Enjoy.
Monday, December 31, 2018
you are here
Today, we're at a certain position in our orbit around the Sun. Tomorrow, we'll be 2.6 million kilometres further along. Between now and then, humans will alter their calendars and clocks and celebrate.
Enjoy.
Enjoy.
Sunday, December 30, 2018
considering 2019 meteors
Here's the meteor outlook for 2019. Inspired by the Sky & Telescope magazine article.
I added the Moon brightness into the table so one can make a quick assessment as to the visibility.
This is tuned for observers in or near Ontario, Canada, factoring in the Sun's position at the shower peak. The dates and times are local too, for Ontario.
where:
"peak" is the shower peak date and time, Eastern time zone;
"ZHR" is the idealised zenithal hourly rate; and,
"Moon" is the Moon's illumination in percentage (%); and,
"Sun" is the Sun's elevation at the moment of the shower peak in degrees (°).
I paint a bleaker picture here than S&T. They show the η Aquarids and δ Aquarids as candidates, given the low Moon brightness, but if you're picky about the peak time, it won't work for viewers in south-western Ontario.
See my annual meteor showers table on the lumpy companion for a longer list of showers, generally ones over 10 per hour.
Also see my graphical presentation of shower curves, emphasising the meteor "seasons" and that the peak date and time is kind of a big deal...
§
Edits! I relied on the Universal Time dates and times in the 2019 RASC Observer's Handbook but just learned that there were some errors. I have adjusted the dates and times from the original post, affecting slightly the Quants, eta Aqr's, delta Aqr's, and Perseids...
I added the Moon brightness into the table so one can make a quick assessment as to the visibility.
This is tuned for observers in or near Ontario, Canada, factoring in the Sun's position at the shower peak. The dates and times are local too, for Ontario.
| shower | peak | ZHR | Moon | Sun |
|---|---|---|---|---|
| Quadrantids | 3 Jan - 9:00 PM | 100 | 4 | -44 |
| Lyrids | 22 Apr - 8:00 PM | 20 | 85 | 1 |
| η (eta) Aquarids | 6 May - 10:00 AM | 60 | 3 | 41 |
| δ (delta) Aquarids | 29 Jul - 12:00 PM | 30 | 9 | 59 |
| Perseids | 13 Aug - 3:00 AM | 90 | 95 | -27 |
| Orionids | 21 Oct - 8:00 PM | 20 | 45 | -18 |
| South Taurids | 5 Nov - 7:00 PM | 20 | 64 | -22 |
| North Taurids | 12 Nov - 6:00 PM | 15 | 100 | -12 |
| Leonids | 18 Nov - 1:00 AM | 20 | 67 | -63 |
| Geminids | 14 Dec - 2:00 PM | 120 | 92 | 19 |
| Ursids | 22 Dec - 10:00 PM | 15 | 11 | -55 |
where:
"peak" is the shower peak date and time, Eastern time zone;
"ZHR" is the idealised zenithal hourly rate; and,
"Moon" is the Moon's illumination in percentage (%); and,
"Sun" is the Sun's elevation at the moment of the shower peak in degrees (°).
I paint a bleaker picture here than S&T. They show the η Aquarids and δ Aquarids as candidates, given the low Moon brightness, but if you're picky about the peak time, it won't work for viewers in south-western Ontario.
See my annual meteor showers table on the lumpy companion for a longer list of showers, generally ones over 10 per hour.
Also see my graphical presentation of shower curves, emphasising the meteor "seasons" and that the peak date and time is kind of a big deal...
§
Edits! I relied on the Universal Time dates and times in the 2019 RASC Observer's Handbook but just learned that there were some errors. I have adjusted the dates and times from the original post, affecting slightly the Quants, eta Aqr's, delta Aqr's, and Perseids...
Saturday, December 29, 2018
enjoyed his report
Frank shared a double star report on the RASC Toronto Centre forums.
I finally got a couple of hours of clear sky and made the following notes about the November list:
I finally got a couple of hours of clear sky and made the following notes about the November list:
- I found 59 AND to be easy to split with nearly similar magnitudes.
- 32 ERI is a nice contrast double at 100x with the orange and blue colours.
- The third pair, STF 180, is gamma ARI (not lambda) and has both stars with similar brightness that appear like a pair of eyes.
- I found both 66 CET and 77 PSC to be a nice contrast in colours and the difference in brightness of each pair.
Sunday, December 23, 2018
imaged HD 25201 for fun (Halifax)
I asked the BGO robot to aim to the multi-star system HD 25201 aka Σ479 (Struve) in the constellation Taurus. Just for fun.
Luminance only, 1 second subexposures, 12 stacked shots. FITS Liberator, Apple Preview. North is up; east is left.
Sissy Haas says the C star is brown-cherry! Well, I'll have to process in colour then for the full effect...
Luminance only, 1 second subexposures, 12 stacked shots. FITS Liberator, Apple Preview. North is up; east is left.
Sissy Haas says the C star is brown-cherry! Well, I'll have to process in colour then for the full effect...
Saturday, December 22, 2018
received starry socks
Santa (my neighbour) gave me some Hot Sox! Ha ha, Starry Night! Inspired by Vincent van Gogh's painting.
He made this painting in June 1889 while in the insane asylum...
He made this painting in June 1889 while in the insane asylum...
Friday, December 21, 2018
received SkyNews Jan/Feb
I'm looking forward to the preview of the year, the Top 10 Sky Sights For 2019. And new product reviews.
assembled Winter Albireo in colour
Assembled the LRGB data for the Winter Albireo, combining the data gathered yesterday. Lovely.
L 1x12, RGB 3x12 each. FITS Liberator, Photoshop. North is up; east is left.
L 1x12, RGB 3x12 each. FITS Liberator, Photoshop. North is up; east is left.
monthly double stars issued
Issued my double star "bulletin" for December. It is a short list of suggested double and multi-star targets. I shared this on the RASC Toronto Centre forums. And I post here for all.
§
Sadly, if you mine the Environment Canada data for this region, you'll find it is generally cloud-free between 0 and 10 percent of the time. Happy winter! At least the nights are long. Good luck with these double stars:
Happy hunting. Let me know if you're able to punch through the clouds.
Blake Nancarrow
astronomy at computer-ease dot com
§
Sadly, if you mine the Environment Canada data for this region, you'll find it is generally cloud-free between 0 and 10 percent of the time. Happy winter! At least the nights are long. Good luck with these double stars:
| star | also known as | alternate catalogue |
|---|---|---|
| HD 15407 Per | Struve 270 | SAO 23389 |
| 6 Tri | TZ or STF 227 | SAO 55347 |
| HR 577 Ari | STF 196 | SAO 75075 |
| HD 5780 Cet | Σ80 | SAO 109577 |
| ο2 (omicron-2) Eri | Keid or Struve 518 | SAO 131063 |
Happy hunting. Let me know if you're able to punch through the clouds.
Blake Nancarrow
astronomy at computer-ease dot com
Thursday, December 20, 2018
acquired Jan Sky and Tel
Rhonda said she was going to be out and about and asked if I needed anything. When we said she'd be near bookstores, I asked if she could keep an eye out for the January 2019 edition of Sky & Telescope. She found it. Yeh!
I particularly wanted the Stargazer's Almanac chart, the interesting hourglass-shaped infographic showing sunset and sunrise times, setting, rising, and transits of the planets, the phase of the Moon, etc. It's a very unique chart, a little challenging to read, but very useful.
I particularly wanted the Stargazer's Almanac chart, the interesting hourglass-shaped infographic showing sunset and sunrise times, setting, rising, and transits of the planets, the phase of the Moon, etc. It's a very unique chart, a little challenging to read, but very useful.
caught winter showcase pair (Halifax)
The Burke-Gaffney Observatory robot imaged double-star HR 2764. aka h 3945 or 145 Canis Majoris. Well known as The Winter Albireo.
Luminance only, 1 second subexposures, 12 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.
First viewed (stumbled upon) this target on 26 Mar '11.
§
Made the colour image on 21 Dec '18.
Luminance only, 1 second subexposures, 12 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.
The image looks pretty good despite poor seeing and a nearly full Moon.
First viewed (stumbled upon) this target on 26 Mar '11.
§
Made the colour image on 21 Dec '18.
Tuesday, December 18, 2018
in the right area (Bradford)
Tried to spot the comet in bins. Nearly overhead. It was 1½ fields north-east of the Pleiades (M45). No luck. I saw the hockey stick of stars with 54 Persei. I saw HR 1390. 46P was supposed to be right there. Panned about. Too much Moon sadly...
Peeked at Messier 42 (M42), ι (iota) Orionis, the belt stars of Orion, σ (sigma) Orionis, and Meissa [ed: er, Collinder 69]. Then some streamers parked right in the area of the comet. OK. I get the message.
Peeked at Messier 42 (M42), ι (iota) Orionis, the belt stars of Orion, σ (sigma) Orionis, and Meissa [ed: er, Collinder 69]. Then some streamers parked right in the area of the comet. OK. I get the message.
Sunday, December 16, 2018
a wash
Gar. I ventured outside several times in hopes of seeing clear skies. I really wanted to view the comet. Alas, low cloud and ground fog stopped me. Scuppered. With the stoopid Moon getting more annoyingly brightly everyone night, I fear I'm out of luck. Maybe in 2 weeks...? So frustrating.
did not see ISS (Bradford)
Tried to image the International Space Station from the backyard but it was too low and too faint. The flyover was from 5:17 PM for about 10 minutes. I did not see anything visually.
Canon 40D, Rokinon 8mm manually focused, ISO 100, f/22, 10 seconds, daylight white balance, barn door tracker, Neewer intervalometer.
Thanks to Steve McKinney for checking my math.
§
David Saint-Jacques is on station for 6 months... So there will be other opportunities.
Canon 40D, Rokinon 8mm manually focused, ISO 100, f/22, 10 seconds, daylight white balance, barn door tracker, Neewer intervalometer.
Thanks to Steve McKinney for checking my math.
§
David Saint-Jacques is on station for 6 months... So there will be other opportunities.
SkyNews at local
First time I think I've ever seen the Canadian astro rag available at my local Shoppers.
Ironically, I was shopping for Sky & Tel.
Ironically, I was shopping for Sky & Tel.
Thursday, December 13, 2018
we hit our milestone
The Royal Astronomical Society of Canada achieved a little milestone today.
With the declaration of three Explore the Universe observing certificates at the Sarnia Centre RASC awarded 27 observing certificates in the year 2018, the most in one year since 2007. This was a threshold the national observing committee was hoping to reach by year’s end. Dave Chapman, the chair, was very happy. He thanked everyone for making this happen.
I was happy too. It is apropos with 2018 being our 150th anniversary.
With the declaration of three Explore the Universe observing certificates at the Sarnia Centre RASC awarded 27 observing certificates in the year 2018, the most in one year since 2007. This was a threshold the national observing committee was hoping to reach by year’s end. Dave Chapman, the chair, was very happy. He thanked everyone for making this happen.
I was happy too. It is apropos with 2018 being our 150th anniversary.
Monday, December 10, 2018
the long journey to the Sculptor (Stillwater Lake)
The journey to the Sculptor galaxy was long. I'm indebted to Dave Lane.
It all started, of course, with my harebrained idea to image all the RASC Finest NGC objects. This was the project I decided to set myself 'round the time I started learning and using the Burke-Gaffney Observatory in February 2016. I didn't consider however at the outset that some objects might be out of range...
I first encountered this issue in May 2016 when I tried to capture NGC 6520. Despite my efforts, my requests were rejected. I was disappointed but not entirely surprised with the open cluster never rising over 18 degrees above the horizon.
I was using the MINALT setting from the beginning to (indirectly) control how long I wanted the system to wait before imaging a target. I.e. I wanted to image higher vs. lower. Ideally, to shoot targets at an elevation of 45° or above.
On NGC 6520 I used MINALT=15 but didn't fully understand the matter of altitude constraints at the time.
In June 2016, I made a new page in Evernote for targets "too low" for BGO. It was probably around then I made an analogous list in SkyTools (on John Charles). As I transferred more targets to this note, I lamented. I would not able to photograph all the objects in the RASC list.
(A curious example: I initially thought the nebula NGC 6445 would be inaccessible and my fumbles with parameters even though it hovered around 25 degrees preventing lodging a successful request; happily I snared the peculiar planetary in April this year.)
Late in the summer of 2016 I set my sights on the fine galaxy in the Sculptor constellation. On 25 August at 5:43 PM EDT, I asked BGO to listen to me while I submitted the job using "#request object=NGC253 special= LUM,60,10,RED,60,5,GRN,60,5,BLU,60,5 comment=RASCFinest". The 'bot replied "Sorry, NGC253 never rises high enough to be observed at the BGO!"
I can't remember if I tried again at the time but it is likely I just picked other targets, moving on, as I had many candidates still early in the process.
But in December last year it showed on my radar again. A Finest NGC not yet captured. I was better at planning now. I paid more attention to the Year Bar in SkyTools. I paid more attention to the transit or culmination time. It would peak around 7:15 PM AST. Looked good although I knew with was extremely low. So BGO and I had a little chat:
I remarked while imaging The Antenna Galaxies in late December 2017 that I had a "better understanding of the MINALT." Finally I clearly understood the parameter. I learned the default minimum altitude for BGO was 25° yet it could be overridden and forced lower. But only down to 20. That was it. This knowledge helped me bag galaxy NGC 1232 in Eridanus.
Yet it still did not explain why the 253rd NGC wouldn't take.
I resigned myself to getting all but two of the Finest.
Well. With BGO I'd be able to get to all but two. I had optically viewed Sculptor way back on 1 September 2008. So that one was "done" in a sense. Then, happily, I finally viewed NGC 6520 on 12 June 2018. That for me was a milestone: I had seen all the Finest, directly or indirectly. Fun.
Sometime in the fall of 2018 I hatched an idea. I don't remember exactly when or where but the broad strokes were to use another robotic system. That philosophically felt right. Using another robotic system to get the other two NGCs felt right.
During my Burke-Gaffney Observatory presentation at the Ontario Science Centre early October, I mentioned that the Abbey Ridge Observatory "would be open" to RASCals. Dave corrected me: it already was. I think a couple of people joined after seeing my prez. And I started thinking seriously about it.
On 28 October I sent a note to Dave. I said I was entertaining the idea of asking for an account at ARO particularly if it had lower altitude/elevation limits than BGO. I felt it would be neat to image every Finest with a rig accessible via social media.
Not directly related to this endeavour was the use of the new Communicator app created by Dave Lane. I downloaded the Android and Windows apps on November 26 partly to help him test the beta release. For me a most interesting aspect of using the little tool was the instantaneous response. The direct access to the robot meant turnaround time was significantly faster. Dave VIII and I chatted via Facebook Messenger, trying various things in the new app. During the conversation, I asked Dave if he had thought more on my ARO question.
He sent me a snapshot of the obstructed horizon for ARO. The simulation showed the Sculptor galaxy below the tree line at the time of 8 PM. That said, Dave noted the trees were "leafy" so it might work. But it might also require he make a "notch" in the horizon file.
I mimicked the horizon in SkyTools so I could put it into motion. I found NGC 253 would peek over the trees, in the little dip to the south-south-west, in a couple of weeks. Dave told me to touch base shortly before.
That meant I needed to configure for using the Abbey Ridge system. I submitted an ARO request on 27 November but didn't get a response. Later I discovered it was malformed. RTFWP. I composed a properly formatted membership request on 5 December. Dave reminded me to create a password so I could use the Communicator app. Done.
On 9 December, I reached out to Dave. I noted the Sculptor galaxy would culminate around 7:45 PM AST over the next little while. The true altitude would be +20°10'; the altitude above visible horizon would be +20°34' (at least, that's what showed in SkyTools for my BGO SMU profile). The Moon set Monday and Tuesday nights around 8:00 PM. It looked like the Tuesday night weather might cooperate. The CSC for Abbey Ridge looked promising. Clear Outside said both Monday and Tuesday 8-10 PM time slots were fair to good. The Weather Network said both nights would be partly cloud (and really cold)! Astrospheric was not encouraging. I asked if he could help.
On Monday afternoon I checked the weather. It still looked somewhat promising. I pinged Dave on Facebook and apologised for bugging him. He said "no worries" and then sent an email message. "Both observatories will accept ngc253 now even at minalt=25 and its clear NOW!!!! Submit and let me know and I'll bump the priority."
That was very nice of him to help me so.
Wait?! It was clear?! The weather predictions were off. Dave was looking out his window and it was looking good. Oh my Universe! This was great news. I needed to get jobs in queues ASAP.
Hurry! Hurry hard.
I formed an order in Evernote.
Another email arrived. "ARO: The operator has edited your request ID 1373 (NGC253)." I think he set the MINALT even lower.
At 6:16 PM AST, Dave suggested I submit a second time. He provided recommended parameters, "som=w minalt=15 fullsize=yes", noting that "som" would force it to the west side of the meridian.
At 5:38 PM EST, I received a reply from Dave. "A second one, just to give it two tries." And finally the light bulb went off. Get more eggs in more baskets. Ask the observatory to try more than once to cover more bases. To dodge potential clouds. To simply make more attempts as we literally pushed the envelope.
He then updated me: "It is taking forever to get over the 18 degrees I set, but it should run in a few mins..." I was on the edge of my seat.
5:48 PM EST. Told Dave I had added the second request. I asked to bump the priority but he was already on it. "ARO: The operator has edited your request ID 1374 (NGC253)." OK! Good to go.
Two minutes later, Dave said, "Slewing..." Oh, the anticipation. I thanked Dave.
At 6:53 PM AST, Dave forwarded an image. The "sync" image.
Luminance only, 60 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET. North is up; east is left. Gradient on the top of the frame. Satellite at the top-right. S'OK.
6:19 PM EST. I checked my weather resources.
I recorded the Clear Sky Chart values. The predicted numbers were surprisingly poor. Cloud: 70% covered. Transparency: too cloudy. Seeing: 2, poor. The Moon altitude as around 2°. I'm a big fan of the CSC system but it was way off. I snapped the the Clear Outside site: it showed much better conditions. Dave's on-site reports showed that CO's prediction to be better. More current.
Noticed another edit of a queued job. High priority for 1374. Low elevation setting. Ooh. West side.
I continued to monitor the twitter feed but there were not a lot of updates. Then at 7:02 PM EST another email came in. Subject: ARO: #aroreplies I have taken your special observation of NGC253 (ID 1374)! All right. The other side of the meridian. I had followed Dave's good advice and doubled down.
Gradient at the bottom this time—flipped of course.
Happy happy joy joy. Twice the data!
A great feeling. Lots of things came together this evening.
To top it all off, this undertaking marked my first capture with the ARO rig! The robotic Abbey Ridge Observatory is home to a Celestron 14-inch Schmidt Cassegrain Telescope with an SBIG ST-8XME CCD camera. There's a focal reducer that changes the imaging parameters to about 60%.
§
11:28 PM AST. The 'bot relayed the message "ARO: Your observations taken overnight are ready..." I downloaded the ZIP files and opened the luminance frames in FITS Liberator. Good data. Not surprised to see a gradient given the extreme elevation. Converted, opened the TIFS in Paint.NET, and made the JPEGs for this post.
I thanked Dave again. Wow.
§
I learned tonight that NGC 253 is also known as the Silver Coin or Silver Dollar Galaxy. Also, it is in the Caldwell catalogue as entry number 65.
§
Wikipedia link: Sculptor Galaxy.
It all started, of course, with my harebrained idea to image all the RASC Finest NGC objects. This was the project I decided to set myself 'round the time I started learning and using the Burke-Gaffney Observatory in February 2016. I didn't consider however at the outset that some objects might be out of range...
I first encountered this issue in May 2016 when I tried to capture NGC 6520. Despite my efforts, my requests were rejected. I was disappointed but not entirely surprised with the open cluster never rising over 18 degrees above the horizon.
I was using the MINALT setting from the beginning to (indirectly) control how long I wanted the system to wait before imaging a target. I.e. I wanted to image higher vs. lower. Ideally, to shoot targets at an elevation of 45° or above.
On NGC 6520 I used MINALT=15 but didn't fully understand the matter of altitude constraints at the time.
In June 2016, I made a new page in Evernote for targets "too low" for BGO. It was probably around then I made an analogous list in SkyTools (on John Charles). As I transferred more targets to this note, I lamented. I would not able to photograph all the objects in the RASC list.
(A curious example: I initially thought the nebula NGC 6445 would be inaccessible and my fumbles with parameters even though it hovered around 25 degrees preventing lodging a successful request; happily I snared the peculiar planetary in April this year.)
Late in the summer of 2016 I set my sights on the fine galaxy in the Sculptor constellation. On 25 August at 5:43 PM EDT, I asked BGO to listen to me while I submitted the job using "#request object=NGC253 special= LUM,60,10,RED,60,5,GRN,60,5,BLU,60,5 comment=RASCFinest". The 'bot replied "Sorry, NGC253 never rises high enough to be observed at the BGO!"
I can't remember if I tried again at the time but it is likely I just picked other targets, moving on, as I had many candidates still early in the process.
But in December last year it showed on my radar again. A Finest NGC not yet captured. I was better at planning now. I paid more attention to the Year Bar in SkyTools. I paid more attention to the transit or culmination time. It would peak around 7:15 PM AST. Looked good although I knew with was extremely low. So BGO and I had a little chat:
bla: #lookup object=NGC253What? Huh? I was confused. The LOOKUP command suggested it could be added.
robot: Fixed object NGC253 found at position RA=00:47:36.3 DEC=-25d17'58", and it can be requested now
bla: #request object=NGC253 special=LUM,60,10, RED,60,5,GRN,60,5,BLU,60,5 minalt=20 comment=Finest
robot: Sorry, NGC253 never rises high enough to be observed at the BGO!
I remarked while imaging The Antenna Galaxies in late December 2017 that I had a "better understanding of the MINALT." Finally I clearly understood the parameter. I learned the default minimum altitude for BGO was 25° yet it could be overridden and forced lower. But only down to 20. That was it. This knowledge helped me bag galaxy NGC 1232 in Eridanus.
Yet it still did not explain why the 253rd NGC wouldn't take.
I resigned myself to getting all but two of the Finest.
Well. With BGO I'd be able to get to all but two. I had optically viewed Sculptor way back on 1 September 2008. So that one was "done" in a sense. Then, happily, I finally viewed NGC 6520 on 12 June 2018. That for me was a milestone: I had seen all the Finest, directly or indirectly. Fun.
Sometime in the fall of 2018 I hatched an idea. I don't remember exactly when or where but the broad strokes were to use another robotic system. That philosophically felt right. Using another robotic system to get the other two NGCs felt right.
During my Burke-Gaffney Observatory presentation at the Ontario Science Centre early October, I mentioned that the Abbey Ridge Observatory "would be open" to RASCals. Dave corrected me: it already was. I think a couple of people joined after seeing my prez. And I started thinking seriously about it.
On 28 October I sent a note to Dave. I said I was entertaining the idea of asking for an account at ARO particularly if it had lower altitude/elevation limits than BGO. I felt it would be neat to image every Finest with a rig accessible via social media.
Not directly related to this endeavour was the use of the new Communicator app created by Dave Lane. I downloaded the Android and Windows apps on November 26 partly to help him test the beta release. For me a most interesting aspect of using the little tool was the instantaneous response. The direct access to the robot meant turnaround time was significantly faster. Dave VIII and I chatted via Facebook Messenger, trying various things in the new app. During the conversation, I asked Dave if he had thought more on my ARO question.
He sent me a snapshot of the obstructed horizon for ARO. The simulation showed the Sculptor galaxy below the tree line at the time of 8 PM. That said, Dave noted the trees were "leafy" so it might work. But it might also require he make a "notch" in the horizon file.
I mimicked the horizon in SkyTools so I could put it into motion. I found NGC 253 would peek over the trees, in the little dip to the south-south-west, in a couple of weeks. Dave told me to touch base shortly before.
That meant I needed to configure for using the Abbey Ridge system. I submitted an ARO request on 27 November but didn't get a response. Later I discovered it was malformed. RTFWP. I composed a properly formatted membership request on 5 December. Dave reminded me to create a password so I could use the Communicator app. Done.
On 9 December, I reached out to Dave. I noted the Sculptor galaxy would culminate around 7:45 PM AST over the next little while. The true altitude would be +20°10'; the altitude above visible horizon would be +20°34' (at least, that's what showed in SkyTools for my BGO SMU profile). The Moon set Monday and Tuesday nights around 8:00 PM. It looked like the Tuesday night weather might cooperate. The CSC for Abbey Ridge looked promising. Clear Outside said both Monday and Tuesday 8-10 PM time slots were fair to good. The Weather Network said both nights would be partly cloud (and really cold)! Astrospheric was not encouraging. I asked if he could help.
On Monday afternoon I checked the weather. It still looked somewhat promising. I pinged Dave on Facebook and apologised for bugging him. He said "no worries" and then sent an email message. "Both observatories will accept ngc253 now even at minalt=25 and its clear NOW!!!! Submit and let me know and I'll bump the priority."
That was very nice of him to help me so.
Wait?! It was clear?! The weather predictions were off. Dave was looking out his window and it was looking good. Oh my Universe! This was great news. I needed to get jobs in queues ASAP.
Hurry! Hurry hard.
I formed an order in Evernote.
#request object=NGC253 special=LUM,60,10,RED,60,5, GRN,60,5,BLU,60,5 minalt=20 comment=Finest
I submitted it via the Android app to BGO and ARO.
Both failed. The 'ole "never rises high enough" response. Oh boy. Told Dave. "Ack. Stand by... the lookup command worked which puzzles me." Indeed. A long outstanding issue for me.
A few minutes later, Dave replied: "Try ARO now. Don't use exposure longer that 15 minutes per request." He went on to say:
There are 3 constraints, the actual horizon, a minimum altitude regardless of horizon, being "reasonably" observable in the next 30 days, and a lowest dec (this one is just to avoid searching serviceability if its hopeless.
I relayed the good news. My simplified task "#request object=NGC253 special=LUM,60,10 comment=Finest" was accepted and I was assigned job ID 1373.
I sent a "#weather" query at 17:57 AST. ARO said "The sky is CLEAR (temp=-8C, wind=0 km/h)." Look at that.
Started noting emails with the subject "ARO: The operator has edited your request ID 1373 (NGC253)." The human was tuning my request. A couple more came in. I checked Requested Observations pages at ARO. I noted the lower minimum altitude (18°) and the elevated priority. I also saw the FULL SIZE parameter was active. Cool!
Wondered if I was interrupting Dave's dinner when he sent a report.I sent a "#weather" query at 17:57 AST. ARO said "The sky is CLEAR (temp=-8C, wind=0 km/h)." Look at that.
Started noting emails with the subject "ARO: The operator has edited your request ID 1373 (NGC253)." The human was tuning my request. A couple more came in. I checked Requested Observations pages at ARO. I noted the lower minimum altitude (18°) and the elevated priority. I also saw the FULL SIZE parameter was active. Cool!
It is starting up. Some fluffy clouds around so we'll see.
Dome was initially frozen (global warming? its -8C!).
Yes! This was gonna happen! I was excited!
Oh. Sounds like he had to trudge through the snow in the cold to persuade things...
Oh. Sounds like he had to trudge through the snow in the cold to persuade things...
Another email arrived. "ARO: The operator has edited your request ID 1373 (NGC253)." I think he set the MINALT even lower.
I didn't get it, at first. A little fuzzy. In my brain, a fuzzy. I asked if he was suggesting that, his edits notwithstanding, I send a second job. Moments later I thought, what the heck. Sure. Two jobs. I didn't think ordinarily I could do that, be on the same target in the same night, but hey. I submitted another job as per his instructions. It was my first use of the "som" option.
ARO queued the ask at 6:30 PM AST and assigned ID 1374.
I sent an email to the Abbey Ridge machine with the #satellite hash tag.
It did not look great at the moment. But I saw that if the wind was coming from the north-west, the red blotch would move over the observatory west of Halifax. Good.
At 5:38 PM EST, I received a reply from Dave. "A second one, just to give it two tries." And finally the light bulb went off. Get more eggs in more baskets. Ask the observatory to try more than once to cover more bases. To dodge potential clouds. To simply make more attempts as we literally pushed the envelope.
He then updated me: "It is taking forever to get over the 18 degrees I set, but it should run in a few mins..." I was on the edge of my seat.
5:48 PM EST. Told Dave I had added the second request. I asked to bump the priority but he was already on it. "ARO: The operator has edited your request ID 1374 (NGC253)." OK! Good to go.
Two minutes later, Dave said, "Slewing..." Oh, the anticipation. I thanked Dave.
He said, "I might need to go hold some branches aside!" Told him I wanted a picture of that! Super-low I imagined. Just skimming the southern trees of the Stillwater Lake community.
At 6:53 PM AST, Dave forwarded an image. The "sync" image.
There it is! We got it! I was so happy. It looked pretty good too! The thing is huge! I forgot how big NGC 253 was. (And that's why Dave told me to use the full frame.)
It was then I remember the specs for this system. A long focal length given a C14 was being used. It also jostled me that I had yet to build a profile in SkyTools.
6:59 PM AST. Dave forwarded 1 minute raw image. It was fantastic to see the Sculptor galaxy centred.
He shared that it was a "good thing the trees are mostly maples. I must take peek and see what its looking through. Maybe I need summer and winter horizons!" Sounded like even he was surprised. Told him I did some visual observing in the winter and enjoyed pushing lower around deciduous trees. He shared he had trimmed some trees since the horizon was measured.
He shared that it was a "good thing the trees are mostly maples. I must take peek and see what its looking through. Maybe I need summer and winter horizons!" Sounded like even he was surprised. Told him I did some visual observing in the winter and enjoyed pushing lower around deciduous trees. He shared he had trimmed some trees since the horizon was measured.
And then, at 6:07 PM EST, I received an email that I thought, for a long time, that I'd never get. The ARO robot updated me with the missive "ARO: #aroreplies I have taken your special observation of NGC253 (ID 1373)!" w00t!
It was done. I finally had a image of one of the lowest selections from the RASC Finest list. Acquired by remote control (well, initiated by commands I had submitted from Ontario, then fine-tuned by the operator in Nova Scotia). Pretty neat.
Luminance only, 60 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET. North is up; east is left. Gradient on the top of the frame. Satellite at the top-right. S'OK.
6:19 PM EST. I checked my weather resources.
I recorded the Clear Sky Chart values. The predicted numbers were surprisingly poor. Cloud: 70% covered. Transparency: too cloudy. Seeing: 2, poor. The Moon altitude as around 2°. I'm a big fan of the CSC system but it was way off. I snapped the the Clear Outside site: it showed much better conditions. Dave's on-site reports showed that CO's prediction to be better. More current.
Noticed another edit of a queued job. High priority for 1374. Low elevation setting. Ooh. West side.
I continued to monitor the twitter feed but there were not a lot of updates. Then at 7:02 PM EST another email came in. Subject: ARO: #aroreplies I have taken your special observation of NGC253 (ID 1374)! All right. The other side of the meridian. I had followed Dave's good advice and doubled down.
Gradient at the bottom this time—flipped of course.
Happy happy joy joy. Twice the data!
A great feeling. Lots of things came together this evening.
To top it all off, this undertaking marked my first capture with the ARO rig! The robotic Abbey Ridge Observatory is home to a Celestron 14-inch Schmidt Cassegrain Telescope with an SBIG ST-8XME CCD camera. There's a focal reducer that changes the imaging parameters to about 60%.
§
11:28 PM AST. The 'bot relayed the message "ARO: Your observations taken overnight are ready..." I downloaded the ZIP files and opened the luminance frames in FITS Liberator. Good data. Not surprised to see a gradient given the extreme elevation. Converted, opened the TIFS in Paint.NET, and made the JPEGs for this post.
I thanked Dave again. Wow.
§
I learned tonight that NGC 253 is also known as the Silver Coin or Silver Dollar Galaxy. Also, it is in the Caldwell catalogue as entry number 65.
§
Wikipedia link: Sculptor Galaxy.
Saturday, December 08, 2018
there be dragons!
Ha ha. Love this photo from Space Station.
Lots of dragons in low Earth orbit.
I like too how the Canadarm is at the ready.
Lots of dragons in low Earth orbit.
I like too how the Canadarm is at the ready.
stumped
What? Clouds? The north is blotted out. So much for that. I wanted to get an image of the International Space Station with David Saint-Jacques aboard...
Oh my. Clear Outside paints a poor picture.
Maybe my planned 10 PM run won't work...
My walk to and from the drug store suggested the sky was improving.
The CSC has thrown me off. It is very optimistic.
OK. I'll leave the Space Station for another day...
Oh my. Clear Outside paints a poor picture.
Maybe my planned 10 PM run won't work...
My walk to and from the drug store suggested the sky was improving.
The CSC has thrown me off. It is very optimistic.
OK. I'll leave the Space Station for another day...
snagged
Frickin' computers!
Had fiddled unnecessarily with Heavens Above. Every time I went to change the location it switched to a Latin language. Gilipollas!
Returned to my desk to find the mouse pointer frozen. Whiskey tango foxtrot. I had recently tested the space USB cable at the John Max Windows computer as I cannot find my regular tether.
Here I was accelerating with the idea of imaging the ISS pass at 5:48.
Don't need this.
Had fiddled unnecessarily with Heavens Above. Every time I went to change the location it switched to a Latin language. Gilipollas!
Returned to my desk to find the mouse pointer frozen. Whiskey tango foxtrot. I had recently tested the space USB cable at the John Max Windows computer as I cannot find my regular tether.
Here I was accelerating with the idea of imaging the ISS pass at 5:48.
Don't need this.
he shot 46P widefield
Enjoyed Malcolm's photo of comet 46P/Wirtanen, from his online photo gallery, shared on Facebook. DSLR shot with a short refractor. I noted his settings and I'll try as soon as I can. Jealous of his dark skies though. Visit Mr Park's SmugMug gallery for stunning photographs. The comet is (currently) in the Recent Pics area.
Friday, December 07, 2018
tried for Pal 1 (Halifax)
Another image that took a while to get was for Palomar 1 in Cepheus. And in the end, was it worth it? I can barely see anything. Hover over the image to get the location of the dim globular. Magnitude 13.6? I dunno.
This was an attempt to improve on the result from about a year ago.
Red filter only, 60 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET. North is up; east is left. Annotated.
Again, it took some effort to get this.
Submitted the first request on Nov 12, centred on the star GSC 04517 01909. But I goofed with very short exposures, at 10 seconds.
Resubmitted, asking for 60 seconds each. Also, I decided to drop the LUM.
I broke Ralph! Something happened. I still don't know what exactly. Mr Lane forwarded the log. "! In script 'sm-proc-request.dtl' (line=202) - Fatal error - uncaught application error." Yikes. Crashed it good.
This morning both were processed! Double data! Curiously, the first set, from 3:37 AM AST, looked better. The second set was captured at 04:16 AST.
Why do I bother? Maybe it's silly going after these with a tiny telescope. The Palomar Sky Survey was completed in the 1950s with a 48-inch instrument. Π r squared so 4 times the light gathering power. In a less light polluted world.
§
Wikipedia link: Palomar 1 and National Geographic Society – Palomar Observatory Sky Survey.
This was an attempt to improve on the result from about a year ago.
Red filter only, 60 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET. North is up; east is left. Annotated.
Again, it took some effort to get this.
Submitted the first request on Nov 12, centred on the star GSC 04517 01909. But I goofed with very short exposures, at 10 seconds.
Resubmitted, asking for 60 seconds each. Also, I decided to drop the LUM.
I broke Ralph! Something happened. I still don't know what exactly. Mr Lane forwarded the log. "! In script 'sm-proc-request.dtl' (line=202) - Fatal error - uncaught application error." Yikes. Crashed it good.
Dave suggested I "try again" so I submitted another job (using the exact same content) which was accepted... Assigned ID number 7013.
Meanwhile job 7007 appeared. Same request. Maybe Dave tried it again.
So I had two asks in the job jar. Normally you can't do that.
Why do I bother? Maybe it's silly going after these with a tiny telescope. The Palomar Sky Survey was completed in the 1950s with a 48-inch instrument. Π r squared so 4 times the light gathering power. In a less light polluted world.
§
Wikipedia link: Palomar 1 and National Geographic Society – Palomar Observatory Sky Survey.
captured colour data for STT 54 (Halifax)
The BGO imaged multi-star system Otto Struve 54 in Cam (aiming to GSC 04074 00075). Seeing was poor but I was after the colours...
The idea of STT 54 aka HD 21476 came from reviewing Haas's double star book. Her colour descriptions were intriguing. I get "pure white." But what's "bluish khaki?"
L 1x12 RGB 3x12 each. FITS Liberator, Photoshop. North is up; east is left.
STT 54 is the triad to the north, near the top of the image. A, the brighter of the close pair, is clearly white. The slightly dimmer partner to the north is... bluish. Yes, blue. It's a triple. Dim C is to the east-south-east. It's white or grey.
When I hear khaki in the context of colour, I think light brown. I have khaki style pants that come in all kinds of colours. The blue ones are dark. I checked artist Ingrid Sundberg's Color Thesaurus. I don't see "khaki" there. I might use "sky" or "sapphire" for the B star's colour.
The other stars in the field are very interesting. To the west, the solo dark orange ember. That's SAO 12785 with a B-V of 1.80.
The triangle to the south is made up of HD 21477 to the west, a K0 star, with a B-V of 1.27; SAO 12795 at the apex, B-V 1.83; and along the eastern shore PPM 14345, B-V 1.75.
§
Readjusted things a bit. I didn't like how dark the first result was. And I was a tad enthusiastic on the saturation.
A little better. I like that more field stars show.
The idea of STT 54 aka HD 21476 came from reviewing Haas's double star book. Her colour descriptions were intriguing. I get "pure white." But what's "bluish khaki?"
L 1x12 RGB 3x12 each. FITS Liberator, Photoshop. North is up; east is left.
STT 54 is the triad to the north, near the top of the image. A, the brighter of the close pair, is clearly white. The slightly dimmer partner to the north is... bluish. Yes, blue. It's a triple. Dim C is to the east-south-east. It's white or grey.
When I hear khaki in the context of colour, I think light brown. I have khaki style pants that come in all kinds of colours. The blue ones are dark. I checked artist Ingrid Sundberg's Color Thesaurus. I don't see "khaki" there. I might use "sky" or "sapphire" for the B star's colour.
The other stars in the field are very interesting. To the west, the solo dark orange ember. That's SAO 12785 with a B-V of 1.80.
The triangle to the south is made up of HD 21477 to the west, a K0 star, with a B-V of 1.27; SAO 12795 at the apex, B-V 1.83; and along the eastern shore PPM 14345, B-V 1.75.
§
Readjusted things a bit. I didn't like how dark the first result was. And I was a tad enthusiastic on the saturation.
A little better. I like that more field stars show.
acquired all U Cam data (Halifax)
Took a while...
For fun, I wanted to image U Camelopardalis. It is a very red star, spectral class N! And a multi-star system to boot.
I first submitted a job on Nov 21, aiming at the nearby star TYC 40660 1091 1. The Burke-Gaffney Observatory robot accepted my request and queued me up. Then two nights later, BGO had a crack at it. But as I noted, it did not gather all the data, and this time I needed all the colour data. Dang. That said, the seeing was poor and the Moon was high.
I resubmitted the request with the exact same settings (I just copied the first message). It was put into the queue again without fanfare. Happily, that evening, the automated 'scope at SMU tried again. But, sadly, I was clouded out for a second time! Brother! Still, it was Moonie.
Sent in another ask. And this time, success! Gathered all the colour data for the carbon star. Not great seeing but no Moon around. I'll take it!
For all, FITS Liberator. North is up; east is left.
Full colour processed image. LRGB. L at 1 second; colours at 3 seconds. Each channel 12 shots stacked. Total 2 minutes exposure time. FITS Liberator, Photoshop.
Look at that colour!
Also, U Cam aka BLL 12 is a double star. A, of course, is the bright orange-red furnace near the centre of the image; the B consort is to the north, above, the dimmer but still bright blue-white star. Well away (209 seconds of arc according to SkyTools). A fascinating contrast.
§
Wikipedia link: U Camelopardalis.
For fun, I wanted to image U Camelopardalis. It is a very red star, spectral class N! And a multi-star system to boot.
I first submitted a job on Nov 21, aiming at the nearby star TYC 40660 1091 1. The Burke-Gaffney Observatory robot accepted my request and queued me up. Then two nights later, BGO had a crack at it. But as I noted, it did not gather all the data, and this time I needed all the colour data. Dang. That said, the seeing was poor and the Moon was high.
I resubmitted the request with the exact same settings (I just copied the first message). It was put into the queue again without fanfare. Happily, that evening, the automated 'scope at SMU tried again. But, sadly, I was clouded out for a second time! Brother! Still, it was Moonie.
Sent in another ask. And this time, success! Gathered all the colour data for the carbon star. Not great seeing but no Moon around. I'll take it!
For all, FITS Liberator. North is up; east is left.
Luminance only, 1 second subexposures, 12 stacked shots. Paint.NET.
Glomed together the data for the red dwarf. Wow.
Full colour processed image. LRGB. L at 1 second; colours at 3 seconds. Each channel 12 shots stacked. Total 2 minutes exposure time. FITS Liberator, Photoshop.
Look at that colour!
Also, U Cam aka BLL 12 is a double star. A, of course, is the bright orange-red furnace near the centre of the image; the B consort is to the north, above, the dimmer but still bright blue-white star. Well away (209 seconds of arc according to SkyTools). A fascinating contrast.
Wikipedia link: U Camelopardalis.
Wednesday, December 05, 2018
did doubles checks
Did some follow up on the double stars from last night.
ARY 8
From the Washington Double Star database, I found two lines, suggesting a triple. Curiously, the first reported discoveries for both were in 1910. Both updated in 2015. I show the latest values.
00108+5846ARY 8
AB 100 39.1 8.13 8.63 B3IV
AC 43 104.3 8.13 8.29 B7V
ARY 8
From the Washington Double Star database, I found two lines, suggesting a triple. Curiously, the first reported discoveries for both were in 1910. Both updated in 2015. I show the latest values.
00108+5846ARY 8
AB 100 39.1 8.13 8.63 B3IV
AC 43 104.3 8.13 8.29 B7V
The plotted position in SkyTools 3 Pro of B to A is 100° and 39". Good.
The plotted position to the other similar star to A was 43° and 104". Well look at that. So I did see the C comrade! OK.
The magnitudes inside ST3P matched too. Equal stars. Same stellar classes too.
The plotted position to the other similar star to A was 43° and 104". Well look at that. So I did see the C comrade! OK.
The magnitudes inside ST3P matched too. Equal stars. Same stellar classes too.
I don't understand why the software didn't show it as a triple.
Struve 196
From the WDS. I was after the magnitude values this time.
01596+2100STF 196
AB 2015 41 1.8 9.36 10.92 G5
AC 2013 146 21.1 9.36 10.18 G5
AD 2015 9 199.7 9.36 6.01 K0III-IV
BC 2016 154 20.9 10.92 10.18
CD 2015 5 217.3 10.18 6.01
So, a quad system with magnitudes:
A 9.4
B 10.9
C 10.2
D 6.0
Interesting. A multi-star system where A is not the brightest. Not the first time I've encountered something like this. But intriguing that the brightest accomplice is the fourth star.
Sharatan
Huh. A fairly recent discovery with the first entry in 1988.
01546+2049MKT 3
1988 93 0.1
2005 113 0.0
2.6 5.2 A5V
Struve 196
From the WDS. I was after the magnitude values this time.
01596+2100STF 196
AB 2015 41 1.8 9.36 10.92 G5
AC 2013 146 21.1 9.36 10.18 G5
AD 2015 9 199.7 9.36 6.01 K0III-IV
BC 2016 154 20.9 10.92 10.18
CD 2015 5 217.3 10.18 6.01
So, a quad system with magnitudes:
A 9.4
B 10.9
C 10.2
D 6.0
Interesting. A multi-star system where A is not the brightest. Not the first time I've encountered something like this. But intriguing that the brightest accomplice is the fourth star.
Sharatan
Huh. A fairly recent discovery with the first entry in 1988.
01546+2049MKT 3
1988 93 0.1
2005 113 0.0
2.6 5.2 A5V
But the separation values? 0.1 noted 30 years ago down to 0.0 a dozen years ago?! Wow. Nothing like was SkyTools shows. The PA is not bad but it is definitely not 69 arcseconds away.
I also check Stelladoppie for MKT 3. Confirmed it is a very tight pair, spectroscopic really. The rho or separation is never shown more than 0.065".
It is fast! 107 days... But too bad I will never see it.
the wrong comet (Bradford)
The comet photos on Facebook this morning, the Go call by the RASC Toronto Centre observing team for the dark sky session, another comet alert from Clear Sky Alarm Clock, and the rather optimistic Clear Sky Chart prompted me to put together a quick observing session. Let Rhonda know that I would be trying for a comet.
I updated SkyTools 3 Professional with the latest comet data. It showed 46P/Wirtanen would be magnitude 4.3. Wow. But it was 94 arc-minutes in size! Whoa, spread out. Located in Eridanus tonight, culminating between 10 and 11 PM. Some suggested it was a binocular target. The little ETX 'scope would be good.
At 6:32 PM, Tue 4 Dec 2018, I began preparations in earnest. Readied the Sony voice recorder. Noticed it was still on daylight saving time so 1 hour ahead. I compared the recorded time to the Windows 10 computer. The ICD-SX750D DVR voice recorder was about 1 hour and 5 minutes faster than John Max. Verified there was lots of space: 8 hours of time left. Noted the battery level was at the half-way mark.
Grabbed a basket to carry stuff out.
Got the ASUS netbook ready. Made a new SkyTools list with comet 46P as the first entry. Added a bunch of things, including some showpieces for Rhonda, and some doubles from my candidate list. Set the pairs as high priority. Noted a couple of other bright comets, brighter than mag 10. Planned to operate John Repeat Dance from the touchpad so to reduce equipment needed outside. About 8 high priority items.
Installed some AA batteries in the ETX mount. Keeping it simple and fast. No external power. Tested it: whir whir whir.
It was already feeling cold. The air temperature had dropped dramatically from daytime. My desktop Rainmeter applet was showing -6°C. Wow. Fortunately the wind speed was low at 3 km/h. I noted that Astrospheric predicted the ambient temp dropping to -9.
The Clear Sky Chart showed the cloud cover to be low (clear), the transparency fair (below average), and the seeing would be good (4/5 or good). The numbers were specifically for 10 PM. Sounded like a good night for double stars!
I grabbed weather site data. Saved the CSC. Grabbed the Clear Outside report. Wow: Astrospheric showed us in a pocket. The rest of the province was socked in. Clipped it to Evernote too. I played with the Good To Stargaze parameters a bit but in the end it suggested the good times would end around midnight with increasing cloud cover.
It was 7:10 PM and I did some set up for the hand warmers. I started charging the electronic ones. I got out the butane one so it would be ready to fill. I checked the fuel requirements. I had previously noted 20mL I could go higher. OK. I would try that.
OK. At 7:22 I activated the high-contrast mode in Windows 10, something a RASC member had suggested a short time ago. Actually I found it pretty impressive. I wasn't expecting a good result but it acts a lot like what happens when I turn on red light mode in SkyTools. For programs that behave like Notepad and Windows Explorer (the file manager) and even Microsoft Word, they switched to light text on a dark background. Browser pages of course do what they damn well want to do. And Evernote for Windows does not offer dark mode (yet). Still I wouldn't use Windows high contrast mode without red film.
That let me do more work, quick reference card development, and get deeply dark adapted.
8:21. Noted the electronic hand warmers were fully charged. That was quick.
Around 9:30, I suited up. Long johns. Many layers for the torso including RASC vest. Dug out the ole winter coat with hood and the Baffin boots. Damn Pigeon toque.
Filled the butane heater. Used 2½ syringes, 25 mL, this time! I wasn't sure if the new fabric element would work. Couldn't remember if I had used it before. Used a candle to light it. Wasn't sure it was working at first but it seemed to be getting warmer. Did not burn down the kitchen.
Set up in the backyard. Adjustable height chair. Big metal Mamiya tripod with hex plate. ETX. Eyepiece case. Carry-all bag with misc. stuff. Netbook. Red (laser level) wrap-around glasses. Deep red flashlight. I even had the Pocket Sky Atlas in case of emergency.
Neighbours had their Christmas lights up. Dang. It flooded the backyard with light. White LEDs all along their deck railing...
Enjoyed the Seven Sisters naked eye.
Polar aligned the forks. Put the Celestron 26mm Plössl in the telescope. That would produce a magnification of 48 times.
And off we go.
Even 48 times magnification is too much for the Pleiades. Still I enjoyed the tight faint pale orange pair in the centre, two of the stars in CHR 12.
Where are my specs? Returned to the house for old specs, old eyeglasses strap, and simple dew shield. Brought out my telescopic pointer in lieu of a killer laser beam. Should have consulted my backyard checklist... Would have saved me a trip or two.
10:34. Was missing my voice recorder. Thought I left it inside. I'd get it on the next trip...
Sorted my observing list by the Optimum column. First up? Tried for V640.
Using the 3-panel "telescope" view or Visual Sky Simulation in SkyTools, I started my star hop in Cassiopeia. Successfully targeted Caph aka β (beta) Cassiopeiae. Noted double star HD 594, spotted it right away. Near Caph, HD 594 aka ARY 8 was nearly due south. Two equal stars, oriented east-west. They were near another star, similar colour and brightness, making it seem like a triple. I saw 2 other stars, fainter, to the north and west, in fact making it look like a quintuple system. Dim. Soft white or pale white-blue, all. Attractive. Carried on...
[ed: Didn't notice any shimmering!]
10:41. Ugh. With a separation of 1.55", V640 aka STF 3062 would not be splittable. It was on my double star candidate list but needs to be removed. It is a fast mover, it can stay on that list, as I should be able to split it in good conditions with a big 'scope. [ed: Haas says it is "grand."] But it is too hard for a primer programme, I think.
Next up was π (pi) And...
Rhonda returned home. I readied to view the comet. Spotted the Andromeda constellation, Aries. Oh, and Triangulum. Started at the β and γ (gamma) stars of Tri. It was taking a while, a challenging star hop. Told her I'd call when I found it. When I sure I was on the right star, I went to let her know. Coincidentally, she was getting ready to pop out again. I warned her I couldn't see anything. Hawk Eye did not see any fuzziness or aquamarine colour.
She was expecting the big OTA...
Briefly considered the camera on the barn door tracker...
The view through the 'scope was poor and the stars seemed to fade out. She noticed it too. It was the eyepiece fogging. The humidity was high. I had already seen a lot of frost. Gah. So much for a quick setup. Brought out the Kendrick dew heaters to combat the problem. Powered with the small NOCO lithium.
Remember in fact I had brought out the digital audio recorder... Fired it up.
I had another look at 11:25 PM. Confirmed I was in right area. Confirmed ST3P was in real time. Viewed SAO 55051, a mag 8.9 star, right where the comet should be.
I just remembered the transparency was supposed to be poor... Was that a factor? Probably.
[ed: It would help if you choose the correct comet. At the time, I accidentally aimed to 64P in Triangulum, not 46P! Crikey.]
11:27. Decided to move on.
Considered Sharatan aka β Arietis. Fairly close to where I was. Began the star hopping... Should be easy, such a bright star, at the bend in the simple constellation stick figure.
11:37. Stumbled across. HR 577 in Aries. Near Sharatan. Looked like a triangle, a flattened triangle. There was a bright bluish star at the top. Then two tight stars below or to my 7 o'clock, i.e. south. They formed a hockey stick. The two faint ones were much fainter and I thought orange. A quad system according to SkyTools. Sorry, the parent was Struve 196 or SAO 75075. The A and the D were wide, at 196 seconds of arc. Seemed odd. A and B were 1.8". Not possible in this little light bucket. A and C 21.8". Confusing. Where was the A star? It was not the bright one. The faint one at the bend! Weird. Strange designation.
[ed: Checked the the magnitudes in the software.]
Regardless, a neat multi-star system for a small telescope.
[ed: Little surprised this is not in Sissy Haas's book.]
My eyes were watering like crazy. Frustrating. Missed my bifocals.
The butane heater was working great. The old Zippo fuel was OK!
11:42. I finally made it to Sharatan (or Sheratan). I saw a faint diffraction ring. I closely examined the field.
I decided there must be something wrong with SkyTools. There is no equally bright star 69" away. No way. I saw the pair of stars (not a double) to the north east, rather faint stars. That was a yard stick: they were about the same separation as what ST3P said the A and B stars of beta Ari would be. Sharatan would be a bit less. Verified I was in real time mode. Nope, nothing there. I'll have to look stuff up in the WDS...
Noted the skyward lens of the finder scope is dirty. Should be cleaned.
It was interesting to discover that the 8x21 finder diameter is a bit smaller than an old film tube. Huh. Could use one of those to keep the finder covered. Where did I put all those extras?
12:01 AM, Wed 5 Dec 2018. Was getting frustrated with the finder. Nearly useless.
A camera? What about a teenie tiny camera?
12:07 AM. At last, landed on 37 and 39 Tauri. A long hop sequence from the Pleiades, essentially starting at 28 and 27. A long drive to the east, eyepiece hopping. I found two doubles. A double double, actually. Cool. 37 was on the west. Yellow, bright. North was up for me. South of A was a much dimmer star and it was orange. Right or east was 39. Dimmer than 37. Blue or white. Wait! Pale yellow? No blue-white. It's companion was above or north. Orange. 39 A and B were wider than the 37 pair. Cool view. Two in the view. Two for one. SkyTools said 37 aka STT 558 was 134"; 39 or STT 559 was 177". Not on my candidate list. It would be great entry! I had copied this form a binocular list. This would work at low power and high power.
Rhonda popped out before heading to bed. Anything to look at? No comets, sadly. A pretty double double. "Oh, nice! Wow, bright." She liked it. She saw the dew heaters were working. Yeh.
I returned to the ocular. 37 yellow and blue. 39 white and orange. Some other field stars made for an attractive view.
My legs were starting to feel cold.
Keep going!
12:23. Landed at Menkib or ξ (xi) Persei. Sheesh. About a finder field away from my next target. There was a pair nearby (not noted in ST3P).
Nearly at ζ (zeta)...
12:29. Spotted Burnham 540 or HD 24601. I thought it was a pair; it is a triple. A and B very tight at 1.4". Did not split. Not in this little tube. A and C, 57.1" apart. Easy. Mag 8.7 and 9.9. Pretty dim. Right beside my target. A little bit north east. No pronounced colours.
Ho. Noted the tighter fainter pair to the east, HD 281382 aka SEE 33, with mags 9.2 and 10.4. About 26" apart. Angled toward the aforementioned pair. Yes. Saw them. Wow.
Last leg. On my way to ζ Persei now. Another candidate system to test.
12:33. Immediately saw a pair, dim, to the south. Those were the D and E stars. Tried to dig out others. I knew there were others but I was trying to find them without hints from the software. Nothing... nothing obvious.
[ed: Haas has but one entry in double stars for small telescopes, a pair at 12.7". That's the AB pair which I could not see.]
The eyepiece was fogging again. Whiskey tango foxtrot?
Damn! The NOCO battery was off. No lights. What happened? It was dead! Ugh. It went down fast! Well, that means I'm done... [ed: About 1 hour!]
Upped the power with the Tele Vue 9mm (139x), trying to coax out more stars. No joy. The diffraction rings were very pronounced. And I don't think perfectly round. Alas, I could not see additional companions. Still, it was a good test. It works at low power; it'll work at high mag. OK. That's it. Cold and perturbed.
Packed up.
Took in the whole sky to the south. Orion at the meridian. Meissa. Sirius in Canis Major. Canis Minor off to the east. Gemini up high. Oh, yeah, the Winter Football! So big. Hey, and the rabbit ears below Orion's feet.
High cloud in the south, streamers. Rather cold. Saw bright Sirius flicker for a moment but then stop. Right. It was very good seeing tonight.
Hauled the gear inside. Mixed feelings about tonight. Frustrating using the ETX and the ridiculous finder scope. It is so incredibly annoying. I've got to figure out a better way. The controls are challenging to operate especially when viewing near the zenith. The dew was a challenge.
Comedy of errors tonight, forgetting things, sitting in a perfect spot for a street light a block away to shine in my face, the touchpad not working on the computer, bringing outside a corded mouse, and then getting caught in cords, eyeglasses strap not working, still irked I can't find my good ones, the computer mouse falling to the ground repeatedly, battery dying, dying so quickly. It was a little discouraging.
But... But! I knocked down a few more doubles!
Thought of the RASCals down at Long Sault tonight freezing their oculars off.
[ed: Forgot to look for the ISS with Canadian on board... But that was at dusk.]
I didn't trip the motion sensor light once tonight despite all my trips to and fro.
1:06. Inside, warming up, I pulled the current wx data.
From Environment Canada for Newmarket. No Alerts in effect. Clear, -7°C. Observed at: Toronto Buttonville Municipal Airport. Date: 1:00 AM EST Wednesday 5 December 2018. Condition: Clear. Pressure: 101.9 kPa, falling. Temperature: -6.6°C. Dew point: -8.5°C. Humidity: 86%. Wind: N 2 km/h. Wind Chill: -8.
Detailed Forecast issued: 3:30 PM EST Tuesday 4 December 2018. Tonight, Partly cloudy with 30 percent chance of flurries. Wind up to 15 km/h. Low minus 7. Wind chill minus 4 in the evening and minus 10 overnight.
§
Oh oh. Learned my big mistake. Too late... Went to the wrong comet! Brother... Realised this as I transcribed and compiled my notes. Damn it!
§
The butane heater was going strong as I went to bed. So 25 mL of fuel was plenty offering over 6 hours of high heat.
§
Looked into some of the double star issues...
I updated SkyTools 3 Professional with the latest comet data. It showed 46P/Wirtanen would be magnitude 4.3. Wow. But it was 94 arc-minutes in size! Whoa, spread out. Located in Eridanus tonight, culminating between 10 and 11 PM. Some suggested it was a binocular target. The little ETX 'scope would be good.
At 6:32 PM, Tue 4 Dec 2018, I began preparations in earnest. Readied the Sony voice recorder. Noticed it was still on daylight saving time so 1 hour ahead. I compared the recorded time to the Windows 10 computer. The ICD-SX750D DVR voice recorder was about 1 hour and 5 minutes faster than John Max. Verified there was lots of space: 8 hours of time left. Noted the battery level was at the half-way mark.
Grabbed a basket to carry stuff out.
Instrument: Meade ETX-90 Mak
Mount: tripod
Method: star hopping
Switched to red lighting. Powered my LED desk light. Put red film on all the monitors. Forgot I brought home a pre-cut piece for "new" 19-inch i-INC monitors from CAO. It fit perfectly. The Lee Filter red film cut for my old 22-inch Dell monitor worked fine with a little bit of overhang. Put the smartphone into red mode too. Red LED flex USB keyboard light.Mount: tripod
Method: star hopping
Got the ASUS netbook ready. Made a new SkyTools list with comet 46P as the first entry. Added a bunch of things, including some showpieces for Rhonda, and some doubles from my candidate list. Set the pairs as high priority. Noted a couple of other bright comets, brighter than mag 10. Planned to operate John Repeat Dance from the touchpad so to reduce equipment needed outside. About 8 high priority items.
Installed some AA batteries in the ETX mount. Keeping it simple and fast. No external power. Tested it: whir whir whir.
It was already feeling cold. The air temperature had dropped dramatically from daytime. My desktop Rainmeter applet was showing -6°C. Wow. Fortunately the wind speed was low at 3 km/h. I noted that Astrospheric predicted the ambient temp dropping to -9.
The Clear Sky Chart showed the cloud cover to be low (clear), the transparency fair (below average), and the seeing would be good (4/5 or good). The numbers were specifically for 10 PM. Sounded like a good night for double stars!
I grabbed weather site data. Saved the CSC. Grabbed the Clear Outside report. Wow: Astrospheric showed us in a pocket. The rest of the province was socked in. Clipped it to Evernote too. I played with the Good To Stargaze parameters a bit but in the end it suggested the good times would end around midnight with increasing cloud cover.
It was 7:10 PM and I did some set up for the hand warmers. I started charging the electronic ones. I got out the butane one so it would be ready to fill. I checked the fuel requirements. I had previously noted 20mL I could go higher. OK. I would try that.
OK. At 7:22 I activated the high-contrast mode in Windows 10, something a RASC member had suggested a short time ago. Actually I found it pretty impressive. I wasn't expecting a good result but it acts a lot like what happens when I turn on red light mode in SkyTools. For programs that behave like Notepad and Windows Explorer (the file manager) and even Microsoft Word, they switched to light text on a dark background. Browser pages of course do what they damn well want to do. And Evernote for Windows does not offer dark mode (yet). Still I wouldn't use Windows high contrast mode without red film.
That let me do more work, quick reference card development, and get deeply dark adapted.
8:21. Noted the electronic hand warmers were fully charged. That was quick.
Around 9:30, I suited up. Long johns. Many layers for the torso including RASC vest. Dug out the ole winter coat with hood and the Baffin boots. Damn Pigeon toque.
Filled the butane heater. Used 2½ syringes, 25 mL, this time! I wasn't sure if the new fabric element would work. Couldn't remember if I had used it before. Used a candle to light it. Wasn't sure it was working at first but it seemed to be getting warmer. Did not burn down the kitchen.
Set up in the backyard. Adjustable height chair. Big metal Mamiya tripod with hex plate. ETX. Eyepiece case. Carry-all bag with misc. stuff. Netbook. Red (laser level) wrap-around glasses. Deep red flashlight. I even had the Pocket Sky Atlas in case of emergency.
Neighbours had their Christmas lights up. Dang. It flooded the backyard with light. White LEDs all along their deck railing...
Enjoyed the Seven Sisters naked eye.
Polar aligned the forks. Put the Celestron 26mm Plössl in the telescope. That would produce a magnification of 48 times.
And off we go.
Even 48 times magnification is too much for the Pleiades. Still I enjoyed the tight faint pale orange pair in the centre, two of the stars in CHR 12.
Where are my specs? Returned to the house for old specs, old eyeglasses strap, and simple dew shield. Brought out my telescopic pointer in lieu of a killer laser beam. Should have consulted my backyard checklist... Would have saved me a trip or two.
10:34. Was missing my voice recorder. Thought I left it inside. I'd get it on the next trip...
Sorted my observing list by the Optimum column. First up? Tried for V640.
[ed: Didn't notice any shimmering!]
10:41. Ugh. With a separation of 1.55", V640 aka STF 3062 would not be splittable. It was on my double star candidate list but needs to be removed. It is a fast mover, it can stay on that list, as I should be able to split it in good conditions with a big 'scope. [ed: Haas says it is "grand."] But it is too hard for a primer programme, I think.
Next up was π (pi) And...
Rhonda returned home. I readied to view the comet. Spotted the Andromeda constellation, Aries. Oh, and Triangulum. Started at the β and γ (gamma) stars of Tri. It was taking a while, a challenging star hop. Told her I'd call when I found it. When I sure I was on the right star, I went to let her know. Coincidentally, she was getting ready to pop out again. I warned her I couldn't see anything. Hawk Eye did not see any fuzziness or aquamarine colour.
She was expecting the big OTA...
Briefly considered the camera on the barn door tracker...
Remember in fact I had brought out the digital audio recorder... Fired it up.
I had another look at 11:25 PM. Confirmed I was in right area. Confirmed ST3P was in real time. Viewed SAO 55051, a mag 8.9 star, right where the comet should be.
I just remembered the transparency was supposed to be poor... Was that a factor? Probably.
[ed: It would help if you choose the correct comet. At the time, I accidentally aimed to 64P in Triangulum, not 46P! Crikey.]
11:27. Decided to move on.
Considered Sharatan aka β Arietis. Fairly close to where I was. Began the star hopping... Should be easy, such a bright star, at the bend in the simple constellation stick figure.
11:37. Stumbled across. HR 577 in Aries. Near Sharatan. Looked like a triangle, a flattened triangle. There was a bright bluish star at the top. Then two tight stars below or to my 7 o'clock, i.e. south. They formed a hockey stick. The two faint ones were much fainter and I thought orange. A quad system according to SkyTools. Sorry, the parent was Struve 196 or SAO 75075. The A and the D were wide, at 196 seconds of arc. Seemed odd. A and B were 1.8". Not possible in this little light bucket. A and C 21.8". Confusing. Where was the A star? It was not the bright one. The faint one at the bend! Weird. Strange designation.
[ed: Checked the the magnitudes in the software.]
| star | Object Info | chart display | impression |
|---|---|---|---|
| A | 10.84 | 10.8 | dim-same as C |
| B | 12.00 | 10.8 | n/a |
| C | 10.60 | 10.1 | dim-same as A |
| D | 11.94 | 5.9 | bright |
Regardless, a neat multi-star system for a small telescope.
[ed: Little surprised this is not in Sissy Haas's book.]
My eyes were watering like crazy. Frustrating. Missed my bifocals.
The butane heater was working great. The old Zippo fuel was OK!
11:42. I finally made it to Sharatan (or Sheratan). I saw a faint diffraction ring. I closely examined the field.
I decided there must be something wrong with SkyTools. There is no equally bright star 69" away. No way. I saw the pair of stars (not a double) to the north east, rather faint stars. That was a yard stick: they were about the same separation as what ST3P said the A and B stars of beta Ari would be. Sharatan would be a bit less. Verified I was in real time mode. Nope, nothing there. I'll have to look stuff up in the WDS...
Noted the skyward lens of the finder scope is dirty. Should be cleaned.
It was interesting to discover that the 8x21 finder diameter is a bit smaller than an old film tube. Huh. Could use one of those to keep the finder covered. Where did I put all those extras?
12:01 AM, Wed 5 Dec 2018. Was getting frustrated with the finder. Nearly useless.
A camera? What about a teenie tiny camera?
12:07 AM. At last, landed on 37 and 39 Tauri. A long hop sequence from the Pleiades, essentially starting at 28 and 27. A long drive to the east, eyepiece hopping. I found two doubles. A double double, actually. Cool. 37 was on the west. Yellow, bright. North was up for me. South of A was a much dimmer star and it was orange. Right or east was 39. Dimmer than 37. Blue or white. Wait! Pale yellow? No blue-white. It's companion was above or north. Orange. 39 A and B were wider than the 37 pair. Cool view. Two in the view. Two for one. SkyTools said 37 aka STT 558 was 134"; 39 or STT 559 was 177". Not on my candidate list. It would be great entry! I had copied this form a binocular list. This would work at low power and high power.
Rhonda popped out before heading to bed. Anything to look at? No comets, sadly. A pretty double double. "Oh, nice! Wow, bright." She liked it. She saw the dew heaters were working. Yeh.
I returned to the ocular. 37 yellow and blue. 39 white and orange. Some other field stars made for an attractive view.
My legs were starting to feel cold.
Keep going!
Nearly at ζ (zeta)...
12:29. Spotted Burnham 540 or HD 24601. I thought it was a pair; it is a triple. A and B very tight at 1.4". Did not split. Not in this little tube. A and C, 57.1" apart. Easy. Mag 8.7 and 9.9. Pretty dim. Right beside my target. A little bit north east. No pronounced colours.
Ho. Noted the tighter fainter pair to the east, HD 281382 aka SEE 33, with mags 9.2 and 10.4. About 26" apart. Angled toward the aforementioned pair. Yes. Saw them. Wow.
Last leg. On my way to ζ Persei now. Another candidate system to test.
12:33. Immediately saw a pair, dim, to the south. Those were the D and E stars. Tried to dig out others. I knew there were others but I was trying to find them without hints from the software. Nothing... nothing obvious.
[ed: Haas has but one entry in double stars for small telescopes, a pair at 12.7". That's the AB pair which I could not see.]
The eyepiece was fogging again. Whiskey tango foxtrot?
Damn! The NOCO battery was off. No lights. What happened? It was dead! Ugh. It went down fast! Well, that means I'm done... [ed: About 1 hour!]
Upped the power with the Tele Vue 9mm (139x), trying to coax out more stars. No joy. The diffraction rings were very pronounced. And I don't think perfectly round. Alas, I could not see additional companions. Still, it was a good test. It works at low power; it'll work at high mag. OK. That's it. Cold and perturbed.
Packed up.
Took in the whole sky to the south. Orion at the meridian. Meissa. Sirius in Canis Major. Canis Minor off to the east. Gemini up high. Oh, yeah, the Winter Football! So big. Hey, and the rabbit ears below Orion's feet.
High cloud in the south, streamers. Rather cold. Saw bright Sirius flicker for a moment but then stop. Right. It was very good seeing tonight.
Hauled the gear inside. Mixed feelings about tonight. Frustrating using the ETX and the ridiculous finder scope. It is so incredibly annoying. I've got to figure out a better way. The controls are challenging to operate especially when viewing near the zenith. The dew was a challenge.
Comedy of errors tonight, forgetting things, sitting in a perfect spot for a street light a block away to shine in my face, the touchpad not working on the computer, bringing outside a corded mouse, and then getting caught in cords, eyeglasses strap not working, still irked I can't find my good ones, the computer mouse falling to the ground repeatedly, battery dying, dying so quickly. It was a little discouraging.
But... But! I knocked down a few more doubles!
[ed: Forgot to look for the ISS with Canadian on board... But that was at dusk.]
I didn't trip the motion sensor light once tonight despite all my trips to and fro.
1:06. Inside, warming up, I pulled the current wx data.
From Environment Canada for Newmarket. No Alerts in effect. Clear, -7°C. Observed at: Toronto Buttonville Municipal Airport. Date: 1:00 AM EST Wednesday 5 December 2018. Condition: Clear. Pressure: 101.9 kPa, falling. Temperature: -6.6°C. Dew point: -8.5°C. Humidity: 86%. Wind: N 2 km/h. Wind Chill: -8.
Detailed Forecast issued: 3:30 PM EST Tuesday 4 December 2018. Tonight, Partly cloudy with 30 percent chance of flurries. Wind up to 15 km/h. Low minus 7. Wind chill minus 4 in the evening and minus 10 overnight.
§
Oh oh. Learned my big mistake. Too late... Went to the wrong comet! Brother... Realised this as I transcribed and compiled my notes. Damn it!
§
The butane heater was going strong as I went to bed. So 25 mL of fuel was plenty offering over 6 hours of high heat.
§
Looked into some of the double star issues...
Monday, December 03, 2018
Monday, November 26, 2018
InSight lands
The NASA InSight probe successfully landed on Mars.
Now waiting for solar panel deploy and a first camera image.
§
An amazing part of this mission was the use of cube sats flying in tandem to relay data.
§
The first image was received at 15:00 EST. Up is up and left is left! ;-)
Now waiting for solar panel deploy and a first camera image.
§
An amazing part of this mission was the use of cube sats flying in tandem to relay data.
§
The first image was received at 15:00 EST. Up is up and left is left! ;-)
Friday, November 23, 2018
tried for U Cam
I had also loaded a request for BGO to capture U Cam, a very red star. Sadly, the job didn't complete, due to stoopid clouds, so I'll have another go later.
§
Collected all colour data on 7 Dec.
§
Collected all colour data on 7 Dec.
aimed at HD 20588 (Halifax)
Fantastic! I had selected this Camelopardalis target from Sissy Haas's book partly for the interesting colour descriptions... "Gloss white, peach white, bluish khaki." OK. She shows the labels OΣ 373 (for AB) and OΣΣ 33 (for AC). For fun I requested HD 20588 and BGO captured the data.
North is up; east is left. Luminance only, 1 second sub, a stack of a dozen shots. FITS Liberator, Paint.NET.
Now SkyTools 3 Professional refers to these stars as STF 373 and STTA 33. Who is right?
Clearly a quadruple system. Haas only notes 3 stars.
A is the brightest element in the centre of the image.
B is the tight companion to the east-south-east. The dimmest of all in the group.
C is the bright star further along, past B.
D is to the south of the partnership, less than A and C in luminance but brighter than B. ST3P shows this star is designated STU 1.
Looking forward to working this in colour...
There are other neat groupings of stars in the field.
§
Checked the Washington Double Star catalogue and found:
North is up; east is left. Luminance only, 1 second sub, a stack of a dozen shots. FITS Liberator, Paint.NET.
Now SkyTools 3 Professional refers to these stars as STF 373 and STTA 33. Who is right?
Clearly a quadruple system. Haas only notes 3 stars.
A is the brightest element in the centre of the image.
B is the tight companion to the east-south-east. The dimmest of all in the group.
C is the bright star further along, past B.
D is to the south of the partnership, less than A and C in luminance but brighter than B. ST3P shows this star is designated STU 1.
Looking forward to working this in colour...
There are other neat groupings of stars in the field.
§
Checked the Washington Double Star catalogue and found:
03221+6244STF 373AB
03221+6244STTA 33AC
03221+6244STU 1AD
So it's a little mistake in the book and ST3P is right.
§
Assembled in colour on 12 Dec '18.
RGB 3x12 each. FITS Liberator, Photoshop.
A is a soft pale orange. B is a touch darker orange. C and D are a dusty pale light blue.
§
Assembled in colour on 12 Dec '18.
RGB 3x12 each. FITS Liberator, Photoshop.
A is a soft pale orange. B is a touch darker orange. C and D are a dusty pale light blue.
imaged Struve 219 (Halifax)
Full Moon. So I asked for a double star. HD 13247 aka STF 219 in Tri. For fun. The BGO returned this:
Luminance only, 1 second subexposure, 12 in the stack. FITS Liberator, Paint.NET. North is up; east is left.
The B companion is slightly dimmer and nearly due south. Interesting field stars...
My SkyTools software shows three tight stars on the chart but that must be an error. I don't see anything between the bright pair. At the same time the planning app says HD 13247 is a double with a mag 8 and 9 star separated by 11 seconds of arc. The software allow shows a colourful star to the south-west. It will be interesting to work this in colour...
Oh, the pair was on my DS candidate list... I'll have to check it visually.
There's a faint pair of equal stars, even tighter, to the north-east. No designation. Neat.
The zig zag of stars to the south, to the edge of the image frame, is intriguing. There are two sets of three stars aligned...
Luminance only, 1 second subexposure, 12 in the stack. FITS Liberator, Paint.NET. North is up; east is left.
The B companion is slightly dimmer and nearly due south. Interesting field stars...
My SkyTools software shows three tight stars on the chart but that must be an error. I don't see anything between the bright pair. At the same time the planning app says HD 13247 is a double with a mag 8 and 9 star separated by 11 seconds of arc. The software allow shows a colourful star to the south-west. It will be interesting to work this in colour...
Oh, the pair was on my DS candidate list... I'll have to check it visually.
There's a faint pair of equal stars, even tighter, to the north-east. No designation. Neat.
The zig zag of stars to the south, to the edge of the image frame, is intriguing. There are two sets of three stars aligned...
Wednesday, November 21, 2018
darkness
Dark mode arrived to Evernote! Woo hoo! Well, for iOS and Android. Still waiting for Windows and the web. A lot of us (including Robert Sawyer) have been asking for this, for years.
This will improve on dark adaptation when I need to check my notes while at the telescope.
Once they deploy this for the other platforms, I can finally transition from using Windows Notepad for live logging...
This will improve on dark adaptation when I need to check my notes while at the telescope.
Once they deploy this for the other platforms, I can finally transition from using Windows Notepad for live logging...
your monthly double stars
Issued my double star "bulletin" for November. It is a short list of suggested double and multi-star targets. I shared this on the RASC Toronto Centre forums. And I post here for all.
§
I don't know why I bother, really. I mean, we're not going to see stars at night until May 2019, right?!
Anyhoo, if you're lucky to get the odd clear night between now and then, pop into the back garden or onto the deck and have a look. Double stars are visible from anywhere, even in the city, and any time, even with a bright Moon.
Here are some suggestions:
Happy hunting. Let me know how you did!
Blake Nancarrow
astronomy at computer-ease dot com
§
Frank shared his observations on the RASC forum on 29 Dec '18.
He also pointed out a mistake in the Mesarthim or Σ180 entry. It should be γ (gamma) not lambda.
While investigating I found I had quoted the SAO number for λ. gamma's alternate catalogue number should be SAO 92681.
§
I don't know why I bother, really. I mean, we're not going to see stars at night until May 2019, right?!
Anyhoo, if you're lucky to get the odd clear night between now and then, pop into the back garden or onto the deck and have a look. Double stars are visible from anywhere, even in the city, and any time, even with a bright Moon.
Here are some suggestions:
| star | also known as | alternate catalogue |
|---|---|---|
| 59 And | Σ222 | SAO 55330 |
| 32 Eri | (Struve) Σ470 | SAO 130806 |
| Mesarthim or Σ180 | SAO | |
| 66 Cet | (STF) Σ231 | SAO 129752 |
| 77 Psc | Σ90 | SAO 109666 |
Happy hunting. Let me know how you did!
Blake Nancarrow
astronomy at computer-ease dot com
§
Frank shared his observations on the RASC forum on 29 Dec '18.
He also pointed out a mistake in the Mesarthim or Σ180 entry. It should be γ (gamma) not lambda.
While investigating I found I had quoted the SAO number for λ. gamma's alternate catalogue number should be SAO 92681.
Wednesday, November 14, 2018
Binary Universe: checking sidereal time
The December 2018 edition of the RASC Journal celebrates our 150 years looking back to its early days and origins to current activities today. I look forward to reading every piece within.
Whoa! A greeting from the only governor general who has flown in space, Her Excellency the Right Honourable Julie Payette! Very cool!
The article by Mr Rosenfeld on art inspired by astronomical things looks fascinating.
Mr MacDonald has returned to masks in photographic image manipulation. I still struggle with this.
In my Binary Universe column, I discuss time, specifically determining sidereal time (as I need to do now when calibrating the DDO's 74-inch mount). I talk about Stellarium, SkySafari, Polar Finder, MySiderealTime, SkyTime, Astro Clock Widget, and Emerald.
The article by Mr Rosenfeld on art inspired by astronomical things looks fascinating.
Mr MacDonald has returned to masks in photographic image manipulation. I still struggle with this.
In my Binary Universe column, I discuss time, specifically determining sidereal time (as I need to do now when calibrating the DDO's 74-inch mount). I talk about Stellarium, SkySafari, Polar Finder, MySiderealTime, SkyTime, Astro Clock Widget, and Emerald.
found the December Journal
Wait a second. If Jeff was thanking me for referring him to the Astro Clock Widget, then that meant he had read the RASC Journal December edition! Oh. It's been released. I hadn't seen a notice anywhere... I surfed into the national web site, logged in, and spotted the latest. OK.
Jeff thanked me re. ACW
Jeff pinged me via email. Thanked me for the tip on the Astro Clock Widget. No worries.
Tuesday, November 13, 2018
a moon, a planet, a star (Bradford)
Spotted the young Moon as I walked from the train station.
Quite far to the left I tagged a tiny but intense orange point. Ah. Mars.
I briefly considered setting up. But it was late. I hadn't had dinner. My stomach was growling. It wasn't perfectly clear...
And then, while northbound on Toronto Street, shimmering Capella.
Bad seeing.
Quite far to the left I tagged a tiny but intense orange point. Ah. Mars.
I briefly considered setting up. But it was late. I hadn't had dinner. My stomach was growling. It wasn't perfectly clear...
And then, while northbound on Toronto Street, shimmering Capella.
Bad seeing.
rockets!
There was a bowl at reception filled with candy from Hallowe'en. "Rockets!" I exclaimed. I was encouraged to take some. I stuffed my pockets!
Did you know that Rockets were made by Eddie Dee? The Ce De Candy Company Limited, now known as Rockets Candy Company, started making Rockets on Queen Street, Toronto in 1963.
Did you know that Rockets were made by Eddie Dee? The Ce De Candy Company Limited, now known as Rockets Candy Company, started making Rockets on Queen Street, Toronto in 1963.
Monday, November 12, 2018
received OH 2019
Woo hoo! Found the RASC Observer's Handbook 2019 in the mailbox!
Rhonda asked what was on the cover. The Flying Bat and the Squid apparently.
Rhonda asked what was on the cover. The Flying Bat and the Squid apparently.
imaged Palomar 1 (Halifax)
I continue to try to "see" the Palomar globular clusters. This is Palomar 1 in Cepheus.
Centering on the star GSC 04517 01909, I commanded the Burke-Gaffney Observatory to gather some photons. Can you see it?
Luminance frame, 10 seconds, 10 subexposures. Apogee camera.
The globular is the small, faint, gathering of dim stars slightly below and right of centre.
These objects are extremely challenging. So I don't know what I was thinking exactly with respect to the exposure settings. 10 seconds?! Will try again with a much longer exposure time.
Centering on the star GSC 04517 01909, I commanded the Burke-Gaffney Observatory to gather some photons. Can you see it?
Luminance frame, 10 seconds, 10 subexposures. Apogee camera.
The globular is the small, faint, gathering of dim stars slightly below and right of centre.
These objects are extremely challenging. So I don't know what I was thinking exactly with respect to the exposure settings. 10 seconds?! Will try again with a much longer exposure time.
Sunday, November 11, 2018
more operator training
We did more training on the 74-inch telescope. There were about a dozen in the session. We spent some time working on our presentation, conveying science information and some history of the David Dunlap Observatory facility. Chilly in the dome!
Saturday, November 10, 2018
helped at musical astronomical evening
Helped at the RASC Toronto Centre special event Beyond the Skies held at the David Dunlap Observatory.
This was an unique evening with jazz music by The Calderons, regular alcoholic beverages along with themed cocktails, and some astronomy. Amazingly, we had clear skies. I wore a few hats. I helped with audio-visual setup and teardown for the band and the speakers Ian W and Bhairavi. With my new Smart Serve certification, I assisted Reanu at the bar. And I helped with general tasks too.
I was surprised to get asked to debug an issue for Denise and Chris with the 74-inch telescope. Busy night, long, but lots of fun.
Peter V shot photos and loaded them up to a Facebook album.
We offered a couple of science-themed beers. In addition to Space Invader and Cosmic and Corona, we had a couple I hadn't heard of: Thrust! An IPA and Lost In Orbit. Thrust! is by Great Lakes Brewery while Lost in Orbit, an IPA session beer, is by Nickel Brook Brewing.
This was an unique evening with jazz music by The Calderons, regular alcoholic beverages along with themed cocktails, and some astronomy. Amazingly, we had clear skies. I wore a few hats. I helped with audio-visual setup and teardown for the band and the speakers Ian W and Bhairavi. With my new Smart Serve certification, I assisted Reanu at the bar. And I helped with general tasks too.
I was surprised to get asked to debug an issue for Denise and Chris with the 74-inch telescope. Busy night, long, but lots of fun.
Peter V shot photos and loaded them up to a Facebook album.
We offered a couple of science-themed beers. In addition to Space Invader and Cosmic and Corona, we had a couple I hadn't heard of: Thrust! An IPA and Lost In Orbit. Thrust! is by Great Lakes Brewery while Lost in Orbit, an IPA session beer, is by Nickel Brook Brewing.
Monday, November 05, 2018
shot Spirograph in narrowband (Halifax)
Along with the LRGB information, I retrieved narrowband data on the Spirograph planetary in the constellation Lepus.
Hydrogen-alpha, 60 seconds subexposures, 10 stacked shots.
Ionised oxygen, 60 seconds subexposures, 10 stacked shots.
For both, FITS Liberator and Paint.NET. North is up; east is left.
Hydrogen-alpha, 60 seconds subexposures, 10 stacked shots.
Ionised oxygen, 60 seconds subexposures, 10 stacked shots.
For both, FITS Liberator and Paint.NET. North is up; east is left.
shot Spirograph in colour (Halifax)
Sort of. I wanted to image the Spirograph Nebula, IC 418, again. I overexposed the small planetary nebula in my first attempt in January 2017. So, shot 4 times faster this time.
Luminance only, 15 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.
I also wanted to get narrowband data.
Won't see this in full colour of course until I do some work in a photo editor...
Luminance only, 15 seconds subexposures, 10 stacked shots. FITS Liberator, Paint.NET. North is up; east is left.
I also wanted to get narrowband data.
Won't see this in full colour of course until I do some work in a photo editor...
Sunday, November 04, 2018
tried NGC 281 again (Halifax)
Shot the Pac-Man Nebula (NGC 281) again, aimed at TYC 36630 06351. I was hoping to avoid gradient and satellites in the colour data...
Luminance frame at 30 seconds and 10 subexposures. FITS Liberator and Paint.NET. North is up and left is right.
Finally got some good LUM data! No nasty gradient at the bottom. No airplanes. No satellites. No tumblers. Pretty good registration. I'll take it.
I had last worked on this object in August 2016.
Luminance frame at 30 seconds and 10 subexposures. FITS Liberator and Paint.NET. North is up and left is right.
Finally got some good LUM data! No nasty gradient at the bottom. No airplanes. No satellites. No tumblers. Pretty good registration. I'll take it.
I had last worked on this object in August 2016.
captured tangled galaxies (Halifax)
For fun, I asked the Burke-Gaffney Observatory to image the two entangled galaxies in Arp 278.
Luminance frame at 60 seconds, 10 subexposures, FITS Liberator, Paint.NET. North is up and east is left.
These are interacting galaxies NGC 7253A and NGC 7253B.
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I tried to visually observe this pair on 24 Sep '17.
Luminance frame at 60 seconds, 10 subexposures, FITS Liberator, Paint.NET. North is up and east is left.
These are interacting galaxies NGC 7253A and NGC 7253B.
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I tried to visually observe this pair on 24 Sep '17.
real not real
As the crew departed the International Space Station in early October, they did a fly-around, something not done since the shuttle missions. They acquired some amazing imagery. But one really struck me, reminding me of one of the iconic images from 2001: A Space Odyssey.
Fiction:
Non-fiction:
Now, admittedly, it's not an apples to apples comparison on a number of levels.
It's the imagery that impressed me, the composition, the similarities in the framing.
Copyrights and credits by the respective parties.
See the whole set at SpaceflightNow.
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NASA made their own comparison a few years back...
Fiction:
Non-fiction:
Now, admittedly, it's not an apples to apples comparison on a number of levels.
It's the imagery that impressed me, the composition, the similarities in the framing.
Copyrights and credits by the respective parties.
See the whole set at SpaceflightNow.
§
NASA made their own comparison a few years back...
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