Thursday, October 22, 2020

sat the council meeting

Attended the Toronto Centre council meeting. Wore the IT hat and the AV hat. Shared my analysis of the membership stats, the report I generated from Power BI. Asked about logistics for the upcoming Annual Meeting.

received SkyNews for Nov/Dec '20

Received SkyNews. The November/December 2020 issue.

SkyNews magazine Nov/Dec 2020
Neat cover with magnetic field lines. Huh. Rather small font at the top. But more space for the image, which I've always wanted.

I look forward to Warren Finlay's article on view 2000 NGC objects.

Lots of great photos, as usual.

Oh, yes, and Arushi's article on her journey in the Explore The Universe.

And beside Sahar Fatima's piece on the Stellina observation station is my sidebar on Electronically-Assisted Astronomy. 

My first official article for the magazine...

received a nice thank-you

Received a nice personal thank-you note from Denise for helping at the Mars Madness event on Oct 11 (and 12 sorta) at the David Dunlap Observatory.

She recognised my collaborative efforts in setting up the 74-inch telescope in the cold dome, work behind the scenes, my knowledge and expertise and words during the live camera views, and asking questions leading up to the event. That was pleasing as I worried I was a bother.

She said it was the event resounding success! She shared it was validating to receive great feedback from attendees. Yeh.

Tuesday, October 20, 2020

started the doubles program

Today we rolled out the RASC Double Star Observing Program.

https://rasc.ca/double-stars

I uploaded the updated files, built the program web page, and added the relevant paragraph to the main observing page.

It's live. It's official.

Wow.

It's kinda weird to see it there, for real, on the national site.

I have worked on this project for over 6 years. The project team web site I built back in October 2015. I hatched the idea some time before that. And joined the Observing Committee in 2014 as it was the right thing to do. That we were ready last year but the team had some concerns was tough. But it's a better product a year later.

Of course, I enjoyed visiting all of the candidate doubles. I'm not sure exactly the number but I probably personally evaluated 200 to 300 doubles (and multi-star systems) so to produce the final list of 110.

I am grateful for the support and contributions of many people across the country including Michael B, Frank D, Lucian G, Katrina IL, Millie R, Paul Ma, Stu M, and Ian W. 

If I remember correctly, it was with Stu that I first shared my idea and he ran it up the flagpole.

Lucian deserves special recognition for vetting many of the candidate doubles.

The current and past members of the national Observing Committee were tremendous, challenging me, pushing me, and cheering. I thank Blair S, Dale A, Chris B, Randy B, Dave C, Charles E, Melody H, Roger H, Bruce M, Murray P, Karol S, Jo V, Bill W, Alan W, and Vikki Z. 

Chris was an early supporter. I thank him for accepting my proposal back in October 2013.

Dave has bolstered my spirits along the way.

I particularly want to thank Melody for enthusiastically embracing the program, asking great questions, the big questions like "Why are you doing this this way?" and "What does this mean?" Keeping me honest. I particularly enjoy when she shares her observations and sketches.

It's exciting. I hope a number of our members will pursue this.

It's immensely satisfying knowing that the Royal Astronomical Society of Canada will official recognise double star observers.

Monday, October 19, 2020

fixed strap

Fixed the custom dew heater. After finding two broken/failed leads during some bench testing...

Powered by a SLA battery, I tested the first configuration I had tried on Friday night. Kendrick 8-inch dew strap for the C8 corrector plate, my home-made eyepiece dew strap, and the Kendrick controller. I felt the 8" wrap getting warm, then hot, and the home medical thermometer read to 41.8°C, and then it conked out. I think over 42° means the patient is dead. 

The DIY eyepiece strap was cool. Oh oh.

Continuity checks revealed the circuit was open. Sheesh.

Rolled back the cover to find the copper backbone power lead had separated. I don't know why but for some reason I never soldered this. Duh. 

"It's always the wire."

But more continuity checks showed that wasn't the only issue! Now what?!

Rolled back the fabric more and spotted broken nichrome. Dag nab it.

I wasn't surprised. This was a weak point. It needed a stable mounting point...

Lost about 1 cm of heater wire. I wondered what impact that might have.

Drilled a hole in the plastic core for an anchor point for the nichrome-to-copper wire interface. This will eliminate flexure of the brittle nichrome. Buttoned that up.

Soldered the other power lead.

Used lots of electrical tape to shore things up.

Tested again. All is well.

Tried with None More Black, my custom controller. Fine.

Thermometer climbed to over 39°. Yes! 

This speaks to version 2 of the strap: it will feature mounting points in the plastic core.

Sunday, October 18, 2020

you can attend

The next RASC Toronto Centre council meeting is on Thursday 22 October. All members are welcome to attend.

Saturday, October 17, 2020

took in Mars and Cetus doubles (Bradford)

It was clear!

But it felt felt humid, damp... 

7:33 PM, Fri 16 October 2020. Completed a very fast setup. Quick polar alignment putting Polaris (just at the roof line) at the centre. Did not do a multi-star alignment; simply picked up a planet, and turned on the sidereal (Cel.) tracking. Started with the baader planetarium aspheric 36mm 2-inch. 

Did not have a table. Grabbed a bunch of lawn chairs.

Saturn was down in the trees. Jupiter hidden. Ecliptic low. 

Saturn was heading to a clear patch...

Instrument: Celestron 8-inch SCT
Mount: Vixen Super Polaris
Method: slewing and tracking with IDEA GoToStar

Rhonda came out. Invited her to have a seat. "Very nice."

Offered to bump the power. Went with the Pentax 20mm XW 1¼-inch. Centred.

7:38 PM. Nice. The shadow on the rings was more pronounced (than earlier this year). Could see the equatorial belt. The Cassini division easily seen on the west; less so on the east. Lots of moons. Seeing was fair.

Rhonda returned. "Oh wow. Can see the stripes." She asked if she was seeing the shadow. You bet.

I wondered how long Jupiter would take to clear the tree.

I took in the whole sky.

7:44. Bright satellite heading due north. Quite bright, actually. Perhaps a minus magnitude?

[ed: Flyover info...
name: CZ-4 R/B
Spacetrack catalog number 29507
COSPAR ID 2006-046-C
Orbit 530 x 600 km, 97.7°
Category unknown
Country/organisation of origin China
Launch date 23 October 2006 
Launch site Taiyuan Space Launch Center, China
From Heavens Above.]

We talked about work, the weather, tonight's conditions, the next few days, winter tires, working from home, office access, eyeglasses, turkey dinner.

7:55. Headed to Jupiter. No GRS. Barges. Decent seeing. Missing one moon.

[ed: Io was behind. Would emerge from eclipse around 10:30...]

We talked about satellite distances or elevation. ISS was 400 kilometeres. Low Earth Orbit (LEO). Thickness of the atmosphere. Average height of passenger aircraft. The Right Stuff. Geostationary satellites are at 1000s of km. The next Dragon crew launch. SpaceX's plans for ferrying 100 humans. 

8:11. Three moons. Where was the other one? I had the netbook nearby but didn't feel like firing it up.

We talked about colonising Mars. The age we grew up in, including the first humans touching around world; what kids today will experience as we go interplanetary. We went to school without the internet. Paper books. The crazy racket at university. Baby blankets. Another racket. DIY. The missing roll of red film.

Observed Cygnus straight up, Lyra past the meridian, Aquila low, Hercules over the house, little Sagitta.

Another bright satellite went south. Rhonda spotted some others...

Rhonda asked if I was getting cold. Yes. Went for a coat.

8:33. Rhonda thought the view "really nice." She asked what was next... She walked west in the yard. Mars was visible over the hedge... But it would be a while before it was attainable. Unless I moved the 'scope. Didn't wanna do that.

Back to Saturn.

We talking about paintings, nurseries, stars, constellations, planetarium software. Découpage. How to deliver effective Zoom presentations. Messy office backgrounds. Rachel Willis not pulling punches.

Wondered if there was dew on the corrector!?

8:53. We agreed to reconvene in an hour...

Turned off the mount. Headed indoors. Goofed around.

Peaked outside. Mars was good! Mars was clear of the hedge. w00t! Told Rhonda.

10:09. Returned to the backyard. The Red Planet was very good in the telescope. Northern region flat orange, southern hemisphere dark and mottled. A notch. The South Polar Cap (SPC) did not jump out at me.

Neighbour's light was on. Boo.

Eyepiece fogging. Boo.

Rhonda had a look. "Not bad. Crisp edges" Uh huh. 

She wondered if Jupiter had set. Nope, but low behind the west trees.

Installed the 8-inch and eyepiece dew heaters, driven by the Kendrick controller, powered by the hacked computer PSU.

Mars was so bright. It looked white on top... Clouds? Haze? Weird. "So amazing," I thought. I felt the view was incredible. North was up.

The seeing looked fair. "Let's give it a shot." I installed the Tele Vue Type 6 Nagler 9mm. 

10:27. Got it! Saw the SPC. Tiny!

Rhonda saw the lightness at the top, at the 12:30 or 1:00 position. Yep. North polar hood, likely clouds.

I asked what she thought. She seemed nonplussed. Mind you, she had watched our live video from the 74-inch so the bar had been raised pretty high. And the processed pictures that had been shared were pretty impressive.

We talked about how big Mars could appear. Oppositions versus superior conjunctions, equipment, aperture, resolution. I wondered if I had every seen Mars in my 'scope so big. The 2003 event at York... I reflected back on that. But I had been a little preoccupied. And back then? What eyepieces did I have?! Now I had the 9mm. 

10:41. I did not think I was feeling any heat off my new custom DIY dew heater. Was there a problem? Had it failed?!

10:42. Checked the Sony voice recorder. Only 2½ hours left. Battery level: middle. I considered VOX. Then I shut off continuous recording.

Mars: North Polar Hood (NPH) was quite large. SPC visibile. Dark band through the equator. Looked like Mare Cimmerium... [ed: Yes! To the east. Mare Sirenum to the west.] There was a split. Another dark region to the south. Tremendous size at 222 times magnification. Tried to detect features in the north...

Rhonda retired.

Installed the occulting ocular, the Meade (4000) 32mm Super Wide Angle (SWA) (from Tony dos Santos). Recently painted. That is, the field stop occulting sheet (aluminium duct tape) I had recently paint flat black (with Rhonda's help). [ed: I believe this is a Plössl-type eyepiece with a 67 degree AFOV. Long eye relief.]

11:04. Started field identification of stars...

11:09. A batch of clouds came through. Scuppered for the moment. Checked the Oregon Scientific Instruments portable weather station: 76% relative humidity, pressure dropping, rain tomorrow, 1.0°C air temperature, new Moon phase, October 16, battery level OK. 

Clouds got worse.

Headed inside again!

Toes were cold.

11:14. Back inside. Clouded out. Checked the AWC site. Just at the edge of skirting clouds.

Put on my Baffin Island -100°C boots!

12:01 AM, Saturday 17 October 2020. Popped outside. 100% low cloud! Boo! It was eerily bright, the local light pollution reflection off the low layer.

Killed time.

Peeked out the window. Dark. Stars! OK. Back on the horse.

12:29 AM. Pleiades was up. Mars was really high. No clouds. Good for a while. Also keen to get Cetus targets... Meade was still installed. I wanted to get some moons.

Noted a ring or halo again! Seen before... I had seen this with Vega (back in June). Around Mars. Bright objects. It went out just beyond the nearest star [ed: TYC 00026-0648 1]. I wondered what the diameter was... [ed: It is around 12 arc-minutes.]

Needed more grunt. Installed the Tele Vue PowerMate doubler. The Beast!

12:46. Got the star TYC 00026-0162 1, north of Mars. Magnitude 11.5. Deimos was mag 11.8. The star would not take direct vision. Oh boy...

12:52. Spotted to the north and east Pisces stars that were magnitude 11.5 and 11.7. With the Tele Vue PowerMate 2 and Meade 32.

Should have been possible!

Ugh. Not seeing anything. 

Put the 9mm in.

12:58. Never done before. 2x with the 9mm. So, that's 444 power, right?

Gave up. Could not see moons near to Mars. I was disappointed...

OK. Switched to double star mode. I had a couple of targets in Cetus I wanted to check off. Chose my first.

The body of the sea monster, quadrangle of faint stars, was to the south.

While star hopping from ε (epsilon), I spotted the target in the finder scope (Orion 9x50). A relief as I thought for a while I was going the wrong way. From a semi-urban location. In other words, should be visible in binoculars.

Arrived HD 9336 in Cetus.

1:14. Yellow and blue stars. Very wide in the 36mm. To the east was a big isosceles triangle. Bright star at the edge of the field, to the north-east [ed: HD 9421, a triple!]. Mostly empty field. Faint stars. Up was north-west for me. The pair was oriented (somewhat) east-west. Same brightness? I think? That was the first impression. Yellow to the west; blue to the east. Not Earth shattering. Doable.

I had a really hard time focusing. Poor seeing. The trees breathing? In and out.

Below the triangle, on the west side of the double, there was a line of stars, in a slight arc.

It occurred to me that I did not have the "compensating" magnifier/reducer factor in the SkyTools on the John Repeat Dance computer.... for visual. To re-scale the view, given the focuser. 1.1? Need to add.

Maybe the A (west) star was a touch brighter? Just a hair. [ed: SkyTools says 6.8 and 7.4.]

Seeing went bad. In and out.

Next: HD 2394 aka HJ 1968.

Starhopped from β (beta). Used the field stars using a faint little triangle.

1:27. Didn't see it at first. Primary is obvious; the companion is much fainter. Unequal pair. White and orange, maybe?. Oriented north-east to south-west. Widely separated with the 36mm. But the B star was just borderline visible. SkyTools said B was 9.8. Different by over 2½ magnitudes. 

Noted an inline star, SAO 147293, to the north-east.

A line of stars to the south going east-west.

1:32. Could not spot the C star. 

AB: Yellow and orange. 

I was angled low. I was aimed into light polluted skies from Toronto and Mississauga.

Not a great pair...

The RA motor cover was starting to press on the mount. Did a meridian flip.

One more in Cetus. HD 3125. [ed: The Washington Double Star database designation is D 2.]

Started at ι (iota). Frustrating star hop but worth it. There were a couple of bright stars, a decent star hop, but I got all turned around...

2:00. Oh. I like it! White and orange. Very close. Attractively close! The main pair was oriented south-west to north-east. About a magnitude or two different. 

[A and B are too tight.]

Outlier. The D star was to the south-south-east. 10 times the distance. 

Spotted another star, kind of opposite. North-west. Not related. [ed: ST3P says TYC 04675-0149 1.] 1.5x times the AD distance.

Another star to the north. 2x the AD separation. So a big triad.

Nice. OK. Good. Mission accomplished. Nice to close that chapter...

Returned to Mars.

2:12. 9mm. Now south was up. SPC was easy. The notch was pretty well at the Central Meridian (CM). [ed: The gab between Mare Cimmerium and Mare Tyrrhenum.] Seeing was really good. So big. Lovely colours, pale orange, very uniform in the north. Tried to spot features, like Cerebus. Between the highlands at the equator and to the south, it was somewhat mottled black and grey. 

Was Syrtis Major rounding the bend?

Three days after opposition. Wow. Really nice.

Similar view as the DDO night...

Didn't seem like the dew heaters were not working. I had switched to my custom controller with an active duty cycle on both. And I tried the cup warmer on the eyepiece. So now I was sure it wasn't a problem with my new hand-made unit. I wondered if the computer power supply was not putting out enough amps. I thought I had used it before... Maybe I should always use a SLA battery.

Should I keep observing, I wondered? Will there be other opportunities? Is this as good as it gets? Should I sketch?

Tired...

That's it. 

2:18. Humidity 82%, 1.1°, pressure steady, rain tomorrow.

Did a very rapid tear down, intending to sort in the morning...

Grass was wet.

2:37. Back inside. Finished hauling gear from airlock.

I enjoyed that. Great views of Mars! I enjoyed soaking in the view. The Martian moons still elude my eyes though. That the dew heaters weren't working is odd but it must be the source. Tracking was pretty amazing for the night. That was especially amazing given I did not to a star alignment and I had put Polaris in the centre.

§

Learned the reason the custom eyepiece heater wasn't putting out power. Two faults actually. The "rail" copper power lead had not been soldered and unwound itself, through flexure. I don't know why I didn't solder it. Easy fix. More seriously, the leg of the nichrome wire broke, near the mechanical fastener. Damn. Knew that was going to happen, with too much flexing. It needs to be stabilised...

After bench testing, found the 8-inch outputting heat. Yeh. It's a trooper!

Friday, October 16, 2020

found red film

Scared myself (again). Thought I had lost the roll of red film.

I had had the Rosco 42 red film at the DDO so to replace the bit for the television connected to the 74-inch finder scope. I remembered packaging it up and putting it in one of my tote bags after the Mars Madness event. Of course, we hauled all our gear from the dome to the circle. That was where I got fuzzy. I don't recall touching it after that. Vague recollection of grabbing the roll and tossing it in the car. Was that going or leaving? Did it fall out of the bag onto the lawn to be discovered by a perplexing dog walker? I was saddened at the thought of having misplaced it...

Found it!

Behind my hallway door.

On a whim.

I had unpacked it from the car!

I was so sleepy that night, it didn't find it's way into short term memory.

considered Mars

Wanted to see Mars, from the backyard, with my gear.

Simple, quiet, not 'cast on the web.

Clouded out on opposition night, sadly.

Clear Sky Chart near me 16 Oct 2020

Tonight's looking good...

§

Set the OTA outside to cool.

Thursday, October 15, 2020

tested polling

Tested Zoom with polls to see if it will work for the RASC Toronto Centre Annual Meeting and voting by members. Looks like it will do what council wants.

Wednesday, October 14, 2020

helped at RAN

Helped backstage at the RASC Recreational Astronomy Night meeting. The presenters were great, adapting to the OBS Ninja environment. Ennio moderated the YouTube and forwarded questions. I just kind of monitored and assisted Andrew. The server hiccupped and crashed but things, in general, went pretty smooth.

§

Learned later Rhonda watched it on her TV via YouTube tethering. We talked about the speakers and the Q&A period.

§

Raw video available on our YouTube channel.

Tuesday, October 13, 2020

top-down

Re-wrote the presenters guide for delivering virtual presentations with the proper emphasis on using OBS Ninja. I had to step away for a few days to reset my brain.

helped at rehearsal

Helped at the RAN rehearsal. Oh oh. A couple of people had not been prepped... Hopefully one won't go too off-piste...

happy opposition

Mars is opposite the Sun.

Mars, Earth, Sun in a line

Clouds over Ontario.

Monday, October 12, 2020

relieved of duty

Denise sent a note. The subject line read: Re: Telescope operators NO GO for Mars Madness tonight. They are going to use the clips from last night and she'll just introduce them as recorded. So we get to relax and enjoy the long weekend. She thanked me and Rhonda for all the hard work!

Unpacked the car.

ran the 74 during Mars Madness (Richmond Hill)

Rhonda and I travelled to the David Dunlap Observatory so to arrive around 7:00 PM. I wanted lots of time to set up. Denise was heading to the dome when we arrived.

I had her help me with dome prep, telescope setup, and camera steps.

We had a scare when I couldn't get the MallinCam Universe camera going. Had I damaged it? Had it been damaged during the previous test run? When Ward and started playing with it on the bench, it started working. He operated the TEC cooling switch. That was weird.

And then we were concerned when my computer would not run the OBS Ninja links. Wasn't just my computer, actually. The RASC laptop didn't respond either. Somehow, more black magic, the links started working. A few minutes before the 9:00 PM go-live. Crikey.

After that, it was pretty smooth sailing.

RASC DDO Mars Madness title card

Focus was off at the beginning but it was hard to improve upon with the low elevation and bad seeing.

Rhonda and I got Mars looking better later in the program.

I did live talking for the Mars Madness program. Four segments in total. Used three of my prepared scripts. Discussed orientation (got it wrong first time). Turned out that south was up. Discussed visible features. Did some flag waving and a plug for MallinCam.

11:30 PM. Wow. It worked with Denise shooting from the hip, Andrew in Calgary, Celia monitoring in the Warm Room, Ward up top with Denise, and Rhonda helping in so many ways (including centring and focusing). Intense evening.

The 'scope worked great.

After the show, I went to Uranus. It was pretty soft. But colourful.

We did a hybrid shutdown assuming a return in less than 24 hours...

Long night. I was exhausted.

§

Another first for me: having the OTA so low in the east, almost to the point of touching the dome walkway. Had to use the tallest ladder to work at the spectrograph.

I understand we had a decent turn out and good interactions in the YouTube chat.

I installed a ring into the MCU cooling grill for tethering.

During a break, I put a new larger piece of red film on the finder scope TV.

Sunday, October 11, 2020

get the facts

Prepared a bunch of Mars facts, in case I might be called upon tonight...

Many of the temporal items are based on 11 Oct 2020 at 2300h EDT.


DISTANCE

  • Earth-Mars Distance or Separation: 0.4 AU (62 million km)
  • in light-time, that's 3.5 minutes
  • when Mars is on the other side of Sun, light-time can be over 20 minutes
  • the Sun is 8 light-minutes away from Earth
  • Moon 1 to 2 light-seconds
  • Mars Distance (average) from Sun: 1.4 AU (212 million km)
  • it's taking the spacecraft from mid- to late-July 2020 to Feb 2021 to reach Mars, i.e. 6 to 7 months
  • currently the NASA Mars 2020 Perseverance probe is travelling at 104 000 km/h
  • that's 1000 times faster than you driving on the highway
When we communicate with landers and rovers, there can be significant delays.


SIZE 

Diameter, true, physical: 6800 km.

Apparent diameter: +0° 00' 22.4"
That's just 1.8" smaller than in 2018.

For comparison, the Moon is 0.5°, 30', or 1800". No, Mars is not as big as the Moon.


Mars Earth Moon
mass x 10^24 kg 64.2 (1/10th) 598 7.4 (1/100th)
diameter km 6800 (half) 12800 3500 (1/4)
rotation period 24.6h i.e. 24h 40m 23.9h 27.3d

Some fun facts emerge here.

The Martian day is longer. This makes for interesting shifts for humans, back on Earth, when monitor probes, landers, and rovers. And when humans work on the surface of Mars, again, it will make for interesting times.

Also note the Moon rotation period or Moon "day" is 27.3 Terran days. Some believe the Moon does not rotate. Yes, it does.


GRAVITY

  • Mars gravity is stronger than Moon 
  • but it's just 0.376 of the Earth standard
  • person who weighs 80 kg on Earth would weigh only 32 kg on Mars


WHERE

  • Azimuth: +132° i.e. south-east
  • Elevation or Altitude: +41°
  • 30° higher in the sky than it was two years ago
  • rise time 7:00 PM
  • set time 7:30 AM
  • in Pisces
  • moving eastward (or to the right) which is called retrograde


OUR AIR

  • our air affects the view
  • Airmass: 1.5
  • 50% more atmosphere than looking straight up
  • 150 km of air
  • Mean extincted magnitude: -2.1
  • we're losing a 1/2 mag to the air
  • the low elevation dims Mars and reddens it and it's already red!


APPARENT

  • Magnitude: -2.6
  • Jupiter right now -2.1
  • Apparent RA: 01h 24m 48.1s
  • Apparent Dec: +05° 33' 11"
  • again, 22" in size


CONDITIONS

It's a bit hostile.


MarsEarthMoon
avg temp °C-5513-30
nitrogen %3780
oxygen0.1210
CO2950.030

dust storms are fairly common

It's windy:

  • highest wind speed recorded 144 km/h
  • same as a category 1 hurricane on Earth
  • "Very dangerous winds will produce some damage"
  • that's above the Beaufort wind scale maximum rating

higher levels of radiation at the surface

water is present in vapour, ice, and snow

sunsets are blue


DATES

  • near opposition (Oct 13)
  • near closest approach (Oct 6)
  • next opposition 2+ years from now, 26-27 months... early Dec 2022
  • next closest opposition 2035

FYI

  • 1 year from now
  • 11 Oct 2021
  • Mars will be on the other side of the Sun
  • about as far away as it can get...

one Martian year is 687 days


MOTION

  • Orbital Velocity: 26 km/s
  • apparent hourly motion: 52"


OTHER

moons, two, small

  • Phobos
  • Deimos

Illuminated: 99.9%

Albedo: 0.150

found raw Mars data

Found the Mars Viking Colorized Global Mosaic 232m v2 web page.

It is a global image map of Mars with a resolution of 256 pixels per degree (with a scale of approximately 232 meters per pixel at the equator).

This is from the Astrogeology Science Center of the United States Geological Survey. Part of the AstroPedia, a lunar and planetary cartographic catalogue.

I think the USGS offers data products in a raw form. Then others can manipulate this data as they see fit.

This is the horse's mouth.

Discussions with Chris suggest that Starry Night allows the user to control the data source for Mars rendering. He specifically chose the Viking data.

Wish I could do this in my software apps...

I'll put a pin in this one...

found Gardner's Mars page

Old but good.

I found Bob Gardner's Mars page, from 2001, in my internet web travels. He shared graphics from Sky & Telescope magazine.

I really like the magnitude-diameter chart.

And, even though cylindrical, I like the details in the albedo features map with the 8 globe positions.

Continued my search for an interactive globe-style presentation.

Saturday, October 10, 2020

Mars and a meteor (Bradford)

Popped out, just for a second, to see what I could see. From inside, the southern sky over the trees looked a dark violet. Ah, was it clear, after such a grey day? Yes, stars were visible from the deck, even to my bleached eyes. I moved further away from the house, clearing the upper deck. Bingo! Mars! Bright and orange. I immediately thought of the RASCals down at Long Sault. Good for them. And then, suddenly, a short meteor, near zenith, heading south-east. Boom. Nice little treat. Oh, to be out here now... but I was hazy from tryptophan. And I have a big day tomorrow...

if he can't

Saw the message from Claudio.

Unfortunately I wasn't able to enhance the details in the images because it looked like the camera connected with the 74 inch telescope wasn't capturing high speed video (so only a few FPS = video affected by atmospheric turbulence).

That was irksome. And oddly comforting.

It explains why I struggled trying to stack images from my captured Mars video from the DDO Sep test run. If Claudio can't do it, then I can't.

But it also speaks to something very wrong in the MallinCam Universe software. It's junk.

That's so disappointing. Great hardware and no way to properly exploit it.

Friday, October 09, 2020

painted it black

With Rhonda's help, painted the aluminium duct tape inside the Meade 32mm SWA eyepiece. Painted it black. To cut down reflections. In anticipation of viewing Mars. And hoping to occult the planet so to exposed the little moons!

so much confusion

The media really messes things up with astronomical events...

Super moons are not super.

Blue moons are not blue.

What the heck is a "Super Blue Blood Moon?" Please.

Penumbral lunar eclipses are very difficult to detect.

That newly discovered asteroid near the Earth is not going to kill us. Probably.

The next meteor shower is not the be all and end all. Also, meteor showers require dark skies and a lot of patience. Finally, they generally have a short or narrow window. The peak (and best showing) is for a few hours, usually after midnight. Essentially, one night only.

Mars is not as big as the Moon.

And planet oppositions, in contrast to meteor showers, are not one-night-only events.

inner solar system for October 2020

Mars is great right now. And it will be excellent for weeks. But slowly, over time, as the Earth pulls away, the Red Planet will get smaller and dimmer. 

Closest approach was 6 Oct 2020. Mars opposition will occur one week later.

The point is, Mars is very close to us now, so look while you can. But if you don't get a chance until next week, don't sweat it.

Jeepers. If you don't get any chances at all over the next month or so, fine, no worries. Mars will be back in about 2 years.

Some are saying that "if you miss it, you won't get another chance until 2035." False. Earth-Mars oppositions occur every 26 to 27 months. So the next close approach and opposition is around December 2022.

Earth and Mars close again in Dec 2022

The 2035 reference is that the Earth-Mars separation will be the same or less than now. In the winter of 2022, it won't be as good as what we're currently enjoying, but it will still be pretty awesome.

Half the time, a media piece is written by someone without the scientific background to understand many of the nuances. So, they should know to reach out to the Royal Astronomical Society of Canada. Ask RASC. Or the Canadian Space Agency. Ask a specialist.

The other half of the time, they are just trying to sell more newspapers or drive more hits. So, reader beware.

Madness!

Images made with SolarSystemScope. Not to scale.

Thursday, October 08, 2020

reduced again

Hadn't looked for a long time. On Sep 12, prices seemed to return to the "regular" levels. Plus $20 and Pro $53. But when I checked the SkySafari products in the Google Play store I saw them on sale again. $9.49 and $26.99 respectively.

Why don't they say that? "On sale!" That would drive more traffic, no? Daft.

Huh... My little blurb here might help them. But I'm loathe to do them any favours after their rough handling of my complaint in the summer.

MallinCam hotline

Helped Denise, by remote, while she did testing at the David Dunlap Observatory.

9:15. PM. I pinged her. She was setting the sidereal time.

She asked if I was heading down. Ha! Funny.

10:09. She said she was having trouble getting the exposure right with the MallinCam Universe software.

She emailed a screen snap. Mars was blown out.

I phoned her.

Tried to explain the cruddy MCU software. She, like me, was tripped up by the bad interface design. 

But we got it sorted. She was happy. 

She saved video and streamed with Andrew. Andrew was happy.

I was happy. Two computers were set up with the MCU app. Two DDO 74 operators had successfully captured the Red Planet.

Ready for Mars Madness.

spots available

Still seats available for the RASC Toronto Centre Mars Madness events at the David Dunlap Observatory on Sunday 11 October and Monday 12 October.

Visit the Richmond Hill registration web page to buy your tickets.

Wednesday, October 07, 2020

met with IT chair

Had a meeting with Denis, the new RASC TC Information Technology chair. High-level plans, got him into the web site, some of the interested people. Good to get this portfolio going.

Tuesday, October 06, 2020

simulating Mars

I've been trying to simulate good (that is, accurate) views of Mars.

After the camera test at the DDO, I had a go. Tried to find some online resources. Reviewed my Journal article from June 2018. Had a quick look at my software apps.

Today, I started thinking about it again. Phoned Chris from some ideas.

I collate my findings... 

I set the date and time in all these tools to 11 Oct 2020 at 11:00 PM.

Unless otherwise noted, south is down.


SkyTools 3 Professional

Skyhound. Commercial. The Pro package was around $200, I think. Windows only. Version 3 superseded by 4.

Mars in SkyTools 3 Pro

ST3P is, in general, extremely accurate in its displays. For planets this is also true. The rotation factor is correct meaning the software is showing the correct features for the date and time. It has surface feature labels. I played with the font colour and size to improve from the default appearance. What I don't like is the planet rendering. It is soft, simulating the resolution of a small telescope. Can show direction indicator (N-E) in telescope view.


SkyTools 4 Visual

Skyhound. Commercial. Standard is $100 and Pro is $180. USD. Windows only.

Mars in SkyTools 4 Visual

A little surprised to see no improvement in the planet surface rendering or albedo features. Again, I customised the text display. Looks like the leader line algorithm was changed... Can show direction indicator (N-E) in chart and telescope views.


Physical Mars 1.12

Requio Web Design. Commercial. Less than $3. For Android. Last updated 2014... web site gone...

the red planet in Physical Mars for Android

Does not support all telescopic views (rotate, yes, for Newtonians; mirror, no). Rectangular map shows sunlight and sub-Earth point and adjusts for either real-time or a custom date and time. Labels for craters, monts, mons, or landing sites can be shown on this display, but not at the same time. The globe view is realistic but does not support labels! Argh.


Mars Atlas 2.6

By Julian James. Commercial. Less than $10. Screen grab from iPad. Available at the App Store.

Mars Atlas on iOS

Date and time is not the same as the others... I used to have this on an iOS device but I deleted it. I recall it was a great app. Surface feature labels, lander locations, gridlines, real-time view option, customisable date and time, simulated sunlight. Supports different telescopic views.


Sky and Telescope

Web site. Free. Uses JavaScript technology in a web browser. Can run standalone without an internet connection. Visit the information page to get started.

the Sky and Tel Mars calculator

Old snap. Not set to Oct 11. Flat rectangular project so a lot of distortion in the corners. Adjustable date and time (note: UTC). Sub-Earth point in the red circle. All the telescopic view options.


SkySafari 6 Basic

Simulation Curriculum. Free version. Screen grab from Android. Visit the SkySafari web page for more info.

SkySafari (free)

Correct rotation, proper features shown. Detailed image, which is great. Gridlines can be toggled. But surface features are not labelled. And the free version does not offer field-of-view orientation controls so up is up and left is left.


SkySafari 5 Plus

Simulation Curriculum. Commercial. In the $30 to 40 range, if I remember correctly. Screen grab from Android, older version. Visit the SkySafari web page for current info.

SkySafari Plus

Like Basic but surface features can be labelled. Automatic density, i.e. when you zoom, more labels appear. FOV controls but they were not set in the screensnap.


Stellarium 0.18.0 for Windows

Free software. Ur, free for Windows, Macintosh, and Linux users. Visit the main web site. There are mobile version but they cost...

Mars with labels in Stellarium PC

Offers full FOV controls. Planet labels or nomenclature supported; unfortunately, there does not appear to be a density control. Too much! I customised the colour. Correct rotation.


Stellarium Web

Web site. Free. Pretty easy to use. Light weight. Jump into the online tool.

Surprisingly detailed view but you cannot rotate or mirror-reverse for telescopic views. No labels. No grids. Is this view right for the date and time...? Doesn't seem like it... That white bit at the top... Is that the north polar cap? Is so, then this presentation is definitely off.


CalSky

Source: Arnold Barmettler, www.calsky.com. Web site. Free/donate-ware. UPDATE: CalSky just shut down! :-(

Mars in CalSky.com

Chris's suggestion. I hadn't thought of it even though I rely on the web site for alerts sent via email. I was surprised by the aperture setting which increases the resolution of the image. Very cool. I set to the largest they have, a 40" or 1.0-metre telescope. Supports gridlines. But I don't see labels for surface features. Too bad.


Mars Trek

From NASA. Web site. Free. Visit the Mars Trek web site.

NASA's Mars Trek

Very resource heavy. Very detailed. I think it supports high resolution of the USGS survey data. Obtuse—so going through the tutorials is recommended. Various projections are supported with rectangular as the default. I struggled with find common albedo labels. I cannot seem to find a way to set the view for a specific date and time. Is that the north polar cap? I dunno... Good luck!


Solar System Simulator

NASA JPL. Web site. Free. Similar to Dial-A-Moon. Access the fill-in form to start.

Mars from JPL Solar System Simulator

The input screen allows you choose your planet, vantage point, date and time (in UTC), field of view size or percentage of target size, and toggle orbits, brightness, and spacecraft. Not bad. In fact, it's very accurate in turns of rotation. Sadly, no albedo features are labelled. And no flipping or mirroring.


Mobile Observatory 3.3.3

Commercial. Around $7. Screenshot from free version. Android only. Hop into the Google Play store to check out the free version from Wolfgang Zima.

Mars in Mobile Observatory

Nice detailed map. Looks accurate in terms of rotation. Shown at maximum zoom level. Supports horizontal and vertical flipping (but not apply for this image). While the app supports labels, there don't appear to be options for planet surface features...


others...

Chris said StarryNight was fair. Required manual adjustment.

Had a go at Eyes On The Solar System. It's really a space-flight simulator...

Telescopius? Nope.

AstroPlanner. Right! Forgot I had AstroPlanner. But it does not show any surface detail or labels for planets.

Tried Software Bisque's TheSkyX. It shows a mottled view of the fourth planet which rotates but other than the south polar cap, I did not see discernible features. There are no planet albedo labels. Can show direction indicator (N-E).

Mars Xplorer. Free. Android. I have tried this app with high hopes more than once: 3D globe, features labelled, current data. But it is bad. I remember this on my previous phone; it does the same thing on the "new" motorola. The panels of the map flash on and off. People with photosensitive epilepsy may want to avoid.

I asked Chris if he knew if the SVS group did anything like Dial-A-Mars. Nope.


closing thoughts

"But I still haven't found what I'm looking for..."

I want:

  • three-dimensional globe rendering
  • medium to high resolution
  • proper lighting angle
  • major surface features accurately rendered or positioned, accurate rotation, accurate axial tilt
  • major features labelled, not too much, or adjustable label density
  • simulated telescopic views for both odd and even numbers of reflections
  • direction indicator e.g. N-E

Nice to have:

  • axes positions, labelled
  • gridlines, optional longitude numbers
  • arbitrary field of view rotation

It is Mars Atlas, really, that I've been thinking of all this time... Arguably the best.

I thought, when I was researched the Journal article, I had found something eerily similar to the S&T product but that showed Mars as a sphere. Was that my imagination?

§

Update.

My buddy Chris V sent over a snap from Starry Night Pro 8.

Mars in Starry Night Pro 8

Labelled. Supports grid lines. I played with SN back in the day and I recall it was fully featured then, so can flip vertically and horizontally, do field rotation, etc. In this case, north is up, east is left. Chris says he "skinned" it with the Viking mosaic as opposed to the default.

viewed Mars (Bradford)

Popped outside a couple of times during the evening. The sky looked fantastic, cloudless, transparent. Mars was obvious, a bright orange, rising high. Later the Moon chased the Red Planet. I stood such that the upper deck blocked the Moon. Better.

Monday, October 05, 2020

let's learn about Mars!

It's Mars madness week... Closest approach is today and tomorrow. And Mars is at opposition around the 13th. Lots is happening this week.

RASC Toronto Centre in particular is conducting multi-media events the evening of Sunday 11 October and Monday 12 October. We're hoping the skies will be clear so we can show live views through the 74-inch telescope.

Visit the Richmond Hill DDO web site for general information. To buy a ticket for either night, head into the bookings page.

Saturday, October 03, 2020

helped with online event

Helped backstage with the diversity panel discussion, an online presentation by the David Dunlap Observatory. Good event, great speakers.

Lots of personal takeaways too. Like, we must always consider:

Who's not in the room?

odd

Feels weird to not be at a work party at the Carr Astronomical Observatory...

Thursday, October 01, 2020

know that the stars belong to everyone

Tune in this Saturday 3 October for a special event hosted by the RASC Toronto Centre associated with the David Dunlap Observatory.

The Stars Belong to Everyone: Fostering Diversity and Inclusion in Astronomy 

The DDO subcommittee, 7:00 pm, will discuss expanding diversity and inclusion in astronomy in Canada with several panelists

  • Science Advisor to the CSA and professor at UWO, Dr. Sarah Gallagher
  • planetary scientist and science communicator, Dr. Sara Mazrouei
  • CBC Senior Science Reporter and editor of the RASC Journal, Nicole Mortillaro
  • astrophysicist and scientist working on the intersection of science, astronomy, and Indigenous knowledge, Dr. Hilding Neilson

This will be webcast live on the RASC TC YouTube channel.

See the card at the RASC web site.

11 hours

I finally finished uploading my Mars videos from the DDO MallinCam test. Sheesh.

funny timing

Submitted my items to the editor of the RASC Journal, for my next column piece, moments before the reminder notice...

Wednesday, September 30, 2020

helped at speaker event

Helped at RASC Toronto Centre Speaker's Night. Alysa Obertas talked about how to destroy a planet. We need her on our side... 

Andrew asked me to be the questioner again.

The raw video is available for review on our YouTube channel.

found a tube

In the plumbing section of Home Depot I was thrilled to find a small copper coupling. It was in the bin labelled 1/4-inch but the coupler fits nicely over the shank of of a 3/8" bolt. Yes! A small pleasure. Aside from real Teflon, that might be the last bit needed for the Dobsonian base project. This will serve as a robust bearing, made of metal, in the azimuth pivot between the rocker box and ground plate. 

topics

Had a tele-meeting with my new editor. We discussed potential topics....

Monday, September 28, 2020

learned the link was fixed

I received a follow-up note from James E regarding link in my article in the October RASC Journal. He reported the link was "fixed in both [the high and low resolution] editions and uploaded to the website." Great.

quickly processed Mars

Captured Mars through the David Dunlap Observatory telescope with Andrew's video camera.

Mars captured through 74

South is up, east is left.

74-inch telescope-Cassegrain mode, f/17.3, MallinCam Universe, MCU software 5.0, 200 milliseconds, AutoStakkert 3.1, GIMP.

The southern polar cap is at the top-left, reddened by the smoke in our atmosphere. Sinus Meridiani is the dark region right of centre while Aurorae Sinus is left of centre. Eden is the large light region at the 3 through 5 o'clock position. The prime meridian of Mars is nearly straight on...

posted Oct 2020 doubles

Prepared my double star "bulletin" for October 2020. It is a short list of suggested targets. I will share this on the RASC Toronto Centre forums. And I post here for everyone.

§ 

A few double stars for your observing campaigns.

Some of these double stars have dim elements, down to magnitude 10. So you might need a slightly larger rather than smaller instrument. But I think they are all worth it.

staralso known asalternate catalogue(s)
ψ1 AqrSTFB 12, 91SAO 146598, HIP 114855
HJ 1940 CepGaia 2739178880TYC 04302-0707 1, GSC 04302-00707
10 LacS 813SAO 72575, HIP 111841
PPM 172023 PegSTT 443SAO 126937, TYC 00555-0121 1
ο (omicron) Cygο-1, 31 Cyg, HJ 1495SAO 49337, HIP 99675

A quick note on omicron Cygni. Use every level of magnification you have, started with Mark I eyeball. 

STFB refers to Struve Appendix B.

The Gaia catalogue number is from the second data release (DR2).

Enjoy.

Blake Nancarrow
astronomy at computer-ease dot com

Sunday, September 27, 2020

received gas giants

Received a fun astro-themed card from Aubrey. The Papyrus card is sparkly, shiny, and iridescent.

day of birth card with gas planets

Look at all those gas giant planets!

Does this mean I'm full of gas?

downloaded Oct journal

I downloaded the October 2020 Journal.

Ooh. Lots of comet images!

cover of the October 2020 RASC Journal

There's a piece on the various missions to Mars. That will be neat. There's an article about the biological impact of light pollution. Looking forward to that.

In my Binary Universe column I shared my experiences using the Loss Of the Night (LON) app. It helps you measure your local sky's brightness and transfers data to web sites (one by the LON team as well as Globe At Night) to be aggregated with reports. I tested version 2.1.7 on Android.

Unfortunately the supplied hyperlink in the article was broken, despite me spotting and reporting that during proofing.

§

Link fixed in updated PDF files.

Saturday, September 26, 2020

spotted the Moon (Richmond Hill)

Spotted the gibbous Moon in the south on my way to the David Dunlap Observatory. Good, on one hand. Possibly we'd have clear skies...

received stick figures

Received a funny b-day card from the Horvatin clan. Only a little bit of Moon, thank the Universe.

day of birth card with constellations

Aw, shucks.

Doesn't really show in the photo but the stars are shiny on the Carlton Cards card.

I like the constellation stick figures. Especially the cake.

Thursday, September 24, 2020

received tee and mug

Received a fun bday card and neat gifts from Rhonda. All astro-themed.

space kitty day of birth card

Kitty space cadet card. Ha!


Interesting mug from the Wanakita camp, double walled. Inscribed "But I own the stars and the open sky...", it features a carabiner for a handle. Handy.

i need some space tee shirt

Cool shirt from the Life Is Good people.

I must move along.

Sunday, September 20, 2020

EM spectrum

Hey, humans. Your skin detects infrared radiation. Not your eyes. Think about it.

Wednesday, September 16, 2020

continued collecting SNR data

With BGO, I continued to collect data on the West Veil, so to build up the supernova remnant mosaic. One of the hydrogen-alpha images however was damaged.

helped with RAN

Assisted the A/V team with the RASC Recreational Astronomy Night meeting. I was in charge of questions. Ran long but the talks were great. The rough cut is available for viewing on the RASC YouTube channel...

looking for BAL 1588

I found a "neglected" double star in the Washington Double Star database with only one observation from 1909. BAL 1588 in Aquarius. It is marked with "X" in the notes, the symbol for a "dubious double."

On checking SkyTools 3 Pro, I did not find a corresponding entry. But, using the location data (212509.61+015616.6), I identified GSC 00533-0360 at the same spot.

So I sent BGO Robotic Telescope on a mission.

area near double star BAL 1588

Luminance filter, 2 second subexposures, 12 stacked shots. FITS Liberator, GIMP. North is up; left is east.

A good image despite sketchy conditions (some cloud, below average transparency, poor seeing).

GSC0053300360 is the medium-bright star up and left of centre. 

I do not see an obvious double near the centre of the image.

The WDS record says the position angle is 134 and the separation is 17.2. The star magnitudes are listed as 11.1 and 12.8.

ST3P reports GSC 00533-0360 as mag 11.8 (though poor quality).

The bright star to the right or west is HD 203873. To the right of that, nearly due west, in the dimmer star GSC 00533-0394, which is mag 12.8. That's way too far away...

The dim star to the south-east of GSC 00533-0360, a good distance away, is GSC 00533-0799. It's suspect datum for the magnitude is 13.3. It's nearly on the position angle. But again, not applicable by brightness and distance. 

So, this one remains a mystery...

It's fun that double star HD 203993 aka A 2289 is in the frame, to the north-east. ST3P says, in fact, it is a triple with AB separated by 0.2 seconds of arc. No. So we're seeing the C companion, around 225°. The planning app says they are magnitiudes 7.5 and 11.3 and 15.4" apart. Nice appearance. 

Tuesday, September 15, 2020

tried to spot stars (Bradford)

Brought the laundry in. A little late, I know. No stars... No planets. Smoke.

smoky out east

Spotted the tweet from the Burke-Gaffney Observatory, @smubgobs, Observations are disabled tonight due to SMOKE IN THE SKY from US Forest Fires!

printed the OTA

The printing in 3D of my model went very well! The optical tube assembly of the David Dunlap Observatory looks great! Ward did some maintenance work on his Ender, overcoming issues. The OTA on the right is the result. My redesign from 20 Aug, using subtraction, prints well. I've very happy.

DDO 74-inch scale model of the OTA

That's the hard part (I think). Now we'll try printing all the other bits. The next key milestone is getting the articulation to work so that the OTA can be moved into different positions.

Monday, September 14, 2020

watched RAS news conference

Watched the RAS online news conference via the Astronomy Now web site.

Using Zoom, Philip Diamond, the director of the Royal Astronomical Society, introduced the speakers. They included Professor Jane Greaves, Dr William Bains, and Prof Sara Seager. Dr Anita Richards was also on hand from Atacama. They held a media news conference to share their findings on Venus.

A high amount of phosphine was detected in the atmosphere of Venus by radio astronomy measurements. The compound is produced on Earth primarily by living organisms and industrial processes. This signature may indicate the presence of microbes in the temperate layer of the atmosphere of the second planet in our solar system. See the paper at Nature Astronomy.

learned CSC goes 84 hours

Ah ha. Not my imagination! Not a glitch either. The Clear Sky Charts are wider.

I found this piece on the News page.

2020 September 11: More forecasts

CMC is now forecasting 84 hours into the future. Formerly it forecast only 48 hours into the future. From 3 to 48 hours, there is forecast data every hour (except for seeing). From 51 to 48 hours into the future, there is data every three hours.

There is currently no information as to how accurate the forecasts are for hours over 48. CMC belives their long range forecast is very good compared to other models. However, one should still assume the astronomy forecasts are most accurate for the first 12 hours.

[They are] migrating the clear sky charts to use the new data from 51 hours to 84 hours. It will take a few days. Expect not all charts to show the new data, and a few bugs until then.

Very good. It'll be nice to see a bit further out. Yes, the more we go into the future, the less reliable the data becomes. Still, I'm happy about this.

Having said that, it has mucked up a few of my weather resource pages, as the graphical elements are wider. And I imagine that will be happening to others too.

Sunday, September 13, 2020

completed plate solving

With astrometry.net, I plate-solved all the Vulpecula double star images from the evening sessions on Thu 18 Jun and Fri 19 Jun. Consistent pixel scale numbers. But, as I suspected, the camera moved on Friday night, 2 degrees near the beginning, and 1 more degree half-way. Dang. I am still planning to analyse the drift images I took but I think I won't be able to use them.

Saturday, September 12, 2020

prices doubled

Oh. I see. They had had SkySafari on sale for a couple of months. Back on the 5th, Plus was $9.49 and Pro $26.99. Now they were $20 and $53 respectively.

They just don't do this is a reasonable way, I think.

quickly proofed

Received a late request to proof my Journal column.

Friday, September 11, 2020

mostly clear (Bradford)

Some wispy clouds but fairly clear. Jupiter, Saturn, Summer Triangle, Arcturus. Visited some friends in town. They gave me some hockey pucks for my telescope project. We talked about comet 2020 F3 (NEOWISE). I answered some astronomy questions and, with my phone app, showed where Venus would be in the morning.

kp flat-lined

Don't recall ever seeing the kp-index so low and so flat. Nearly no activity. And here I thought we were coming out of the solar minimum.

found NAN

While looking up the discoverer code for "SEI" double stars, I found an entry for "NAN." That means I'm in the WDS! Wow. That's crazy.

Tuesday, September 08, 2020

split T Cyg (Halifax)

On the evening of 13 Jun '20, from the backyard, with the C8, I tried to split T Cygni (BU 677). I did not successful see the allies of the triple. This seemed odd as they were not overly tight to the primary nor were they terribly dim. Used every ocular in the arsenal.

Sounds like a job for BGO!

Centring on TYC 02695-3170 1, I collected photons of T Cyg. And there they are...

double star T Cygni in luminance

Luminance filter, 1 second subexposures, 12 stacked shots. FITS Liberator, GIMP. North is up; left is east.

The B star is close in, at the 8 o'clock position, or south-east.

The C star, slightly dimmer, is at 5 o'clock. That's south-west.

Pretty easy... I wonder why I wasn't able to tag them with my rig? Was I tired? Bad seeing? Cloud? Too much contrast? Was I on the right star?!

Huh. There's another star! About the same separation as C, but on the diffraction spike to the west, so with a position angle of 270. It's really dim though.

Left of centre, to the east, there is the obvious, tight, faint pair, oriented nearly north-south. I had identified that before with the WDS as ES 249.

Once again, there are a ton of doubles and triples in the area...

caught up with Phil

Caught up with my buddy Phil. It's been a while. We chatted about various astronomy matters and had a good laugh of the salacious SkyNews. I miss camping together. Miss chillin' at the CAO.

corrected direction errors

Melody, while observing HR 8281, found some confusing notes in the double star supplemental table I had built. Indeed. Due to an error in my original observation. I corrected that mistake. I proof-read the entire table. And I added more helpful direction indicators, for the multi-star systems.

received LON acknowledgement

Oh. Surprised by an email from Potsdam. An acknowledgement of my "recent observation" with the Loss of the Night app.

That was not exactly recent: August 11.

Must be a bit of a backlog.

Or the team output is impacted by a crazy global pandemic.

Regardless, they talked about the purpose of the email, encouraged the use of the mailing list for the most active updates, described how to see my measurements, recommended submitting often, and (again) reminded me to be safe while observing.

I was pleased, in the end. It's good to know something happened.

That said, I still do not see my measurements shown on the public map site...

Monday, September 07, 2020

looked for Moon and Mars (Bradford)

Grabbed my specs and headed to the backyard, avoiding the light sensor. Ooh. Clouds as I turned the corner, looking south. Right, I had seen rain forecast in the evening. Windy too. In the yard, on the shoofing grass, bunnies watching me no doubt, I did not see the Moon or Mars. Oop. There they are. Over the east hedge. Moved a best west. Wow. Clear patch of sky. The Moon is waning. Mars was bright. Seemed to have some dimension. Is that possible? Measured the separation of the two celestial bodies: one fist. Ten degrees.

returned to SEI 1371 (Halifax)

Asked BGO to image SEI 1371 (centred on SAO 70802). I first imaged this "neglected double" on 22 Sep '19. I did not receive a great image so I decided to redo.

neglected double SEI 1371

Luminance filter, 2 seconds subexposures, 12 stacked shots. FITS Liberator, GIMP. North is up; left is east.

Looks a bit better... the image.

But there's no tight slightly dimmer B companion to the south-east...

tried for SEI 1197 (Halifax)

I suspected some space would be available in the queue with the... Moon. So I looked up some "old" double stars, previously known as "neglected doubles."

Found SEI 1197 from 1895 near GSC 03153-0148. A pair of mag 11 stars with a PA of 174 and sep of 14.7 with precise coordinate value of 203755.47+380520.1.

neglected double SEI 1197

Luminance filter, 2 seconds subexposures, 12 stacked shots. FITS Liberator, GIMP. North is up; left is east.

With a position angle of 174, that would be nearly vertical in the image.

GSC 03153-0148, at the centre of the image, is mag 11.8, according to SkyTools.

The J2000 coordinates of the GSC star are 20h37m59.2s and +38°05'20". The Washington Double Star database coordinate would be very slightly right of the GSC star. Where there's nothing...

Those two equal horizontally oriented stars at 32 arc-seconds apart. So, looking for something about half that...

TYC 03153-0574 1 is intriguing. It's the medium bright star to the the south-east, 7 o'clock, with the fainter companion directly above. Magnitudes are wrong, position is wrong, but the separation looks right.

I do not see a pair of tight vertically arranged mag 11 stars anywhere...

I should pull up a proper motion chart...

§

Hold the phone! When I zoom into the image, I see a star below and left of GSC 03153-0148! Is that it?!

It's 15" away.

The position angle is 151°.

But it's MUCH dimmer.

SkyTools shows J203759.8+380506 at this location at magnitide 16.3.

Which corresponds to other mag 16 stars in the area...

Is that it?

Begs the question, how low does SEI go?

Could it be that Scheiner, J. saw the mag 16 star but accidentally marked it with the mag value of the primary?

§

OK. Ran a query on the 18-24 segment of the WDS and searched for the "max" mag on the secondary: 15.3! So he does go pretty low.

imaged 19 Cyg (Halifax)

Here we go. First of a few double star images courtesy the Burke-Gaffney Observatory.

Centred on TYC 3137-0475-1. I wanted to visit 19 Cygni (aka HJ 603), to get C and E stars. I attempted this target in my Ontario backyard on 16 Jun '20 with my C8 and picked off the B and D sparklers.

19 Cyg A is the obvious bright star.

double star 19 Cygni and friends

Luminance filter, 2 seconds subexposures, 12 stacked shots. FITS Liberator, GIMP. North is up; left is east.

Well, C and E are certainly visible, according to SkyTools 3 Professional. But it begs the question: how would one distinguish these from the many field stars?!

B is the brightest nearby star at the 8 o'clock position, a modest distance from the primary. If I had to guess the position angle, maybe 110 to 115°? Easily spotted in the small rendition of the image, zoomed out. ST3P says: PA 112°, separation 56.0", magnitudes 5.2 and 10.4.

The C (natch, see below) companion is north of B, almost perfectly due north. Much fainter. Barely visible zoomed out. Almost on the east diffraction spike. The AB pair PA and sep guesses: 91° and 51". ST3P says the pair information as BC: PA 13°, sep 21.0", mag 10.4 and 11.1. Gonna have to do my SAS triangle calculations for the AB numbers. I think it is much dimmer than 11. It seems closer to mag 13 or 14.

Attendant D is well away, opposite B. It is slightly dimmer than B at 3 to 4 times the distances. ST3P: 312°, 168.6", 5.2, 11.8. Indeed, if D is close to mag 12, C is below that...

The E (blurg, see below) star is the dimmest of all. I have to squint to see it in the zoomed out image. It's obvious zoomed in, between A and D, almost perfectly in-line, but is dimmer than C. The planning software says this about AE: 322°, 102.8", 5.2, 12.6.

Some of those numbers in SkyTools are wonky.

From Stella Doppie. All data no older than 2014.

AB: 115, 56.8, 5.38, 10.54
AC: 318, 96.6, 5.38, 12.60
AD: 309, 163.8, 5.38, 11.90
BC: 309, 150.5, 10.54, 12.60 (a curious cross-check)
BE: 11, 20.8, 10.54, 13.50

Oh, oh. The labels are different. SD says B and E are to the south-east and C and D are NW. That's a flip of C and E...

Weird. They say E is the dimmest. Nope.

stars around 19 Cyg plotted

The E star (new) is nearly 90°. I had guessed 91. My SAS calculation says 93° with a derived separation of 55.6".

So this was a good imaging task. It plucked out the C and E stars, revealing they are very faint. Near the magnitude limit of the 8" Schmidt. I don't recall the conditions but they'd need to be pretty good to get these comrades. But, again, it might prove challenging, without the aid of good software, to know the associates from surrounding field stars.

The "undesignated" pair I noted 3 months ago is obvious, to the north-east, oriented north-south, same separation as BE. In fact, the same position angle as BE.

One could easily argue there are many double stars here.

Sunday, September 06, 2020

imaged HD 202073 (Halifax)

Ordered the BGO bot to image double star HD 202073 aka BU 270 / S 781. In the backyard in with the C8 on 16 Jun '20 I had tried to spot the companions. Saw D but not C. In the image, A is dead centre with D below, south, equally bright.

double star HD 202073

Luminance stacked image was corrupted. This is the red filtered stack. 6 seconds, 12 exposures. FITS Liberator, GIMP. North is up; left is east.

C is obvious, zoomed in, barely visible zoomed out. It is at the 11 o'clock position to A, quite close. Very dim. SkyTools says it is magnitude 12.7. I think it looks as bright as mag 13 and 14 stars in the field... [ed: Stella Doppie says the C element is 14.1! Explains why I didn't see it...]

There's a B star in the mix, a fast-period binary, in this Equuleus multi-star system. But at 0.5", it is too close to A to split.

Lots of faint doubles in the 'hood...

caught some of the West Veil (Halifax)

Wasn't expecting that!

While the skies were clear on the east coast and I was anticipating double star image requests to be completed, the BGO Robotic Telescope sent a message about TYC 2687-0782-1. It was actually the ID job number, 11874, that caught my eye. It was from my Veil project. Ah. The Moon had not yet risen enough to exceed my "maxmoon" constraint. All right then!

Part of the West Veil aka NGC 6960. Southern portion.

southern portion of Western Veil

Hydrogen-alpha, 60 seconds subexposures, 10 stacked shots. FITS Liberator, GIMP. North is up; left is east.

Oh my. Look at those tendrils drifting down. Looks like I need to add another row to the image mosaic...

saw Saturn and Jupiter (Bradford)

I chose mint ice cream. 

Someone took our bench! We had to sit at the rock in the parking lot! Gosh! So I couldn't see Jupiter and Saturn unless I stood up. Geez!

Checked SkySafari. Mars wasn't up yet...

solar flower power (Cookstown)

Visited Laura's Farm Stand north of Cookstown. The maze sunflowers were past their prime (but not ready for harvesting). Deeper in there were some extraordinarily tall plants.

Witness, solar energy at work.  

flower made by with solar power

Canon 40D, 18-55, ISO 1000, f/14, 1/160 second. Digital Photo Pro, white balance, crop, saturation.

Now I really wanna grow some next year...

more Dob progress

Got off my lazy butt and did some more work on the Dobsonian base for the Edmund Scientific.

In fact, the first thing I did was a quick test fit and eyeballing of the cradle against the 6-inch reflector (with the 7½" optical tube assembly). As I expected, I'll have to cut down the inner braces a bit, chamfer them a little. Whew! I did not goof up on my dimensions for the cradle.

Did some test fitting of the laminate to the altitude bearing on the cradle. Gonna be good!

Put the found scrap pieces of 1x4 in the rocker box at the foot of the front plate. Cut down the last good piece of 1x4 for the foot of the rocket box, back, the open end. Corrected a small mistake. Can't tell from an airplane.

Finally, after making a template, I affixed the circular base plate to the rocker box. All but done the rocker.

viewed Mars and Moon (Bradford)

Popped out to the deck for a moment. "What's that? Wait? What?" Rhonda asked. It looked better than I was expecting, bright orange Mars one lunar diameter away from the gibbous Moon. A spectacular view!

Saturday, September 05, 2020

learned labels work

Oh! They do work! Tags or labels in the blogger back-end seem fine! Even though the interface no longer shows the check list and (initially) says "No matching suggestions," the tags still work! 

If you type into the text box above, they appear. Whew. Still there, still work, don't have to recreate them.

It's still flawed because you don't seem them listed which is disconcerting. And you don't know how they're spelled so you have to go from memory.

Once you enter one, the prompt or message changes to "Include more letters to see label suggestions."

Pfft.

reading paper on triple with planet

I've been reading about the triple star system in Orion with a possible planet!

spinning bowls and plates

I first learned about this in Neatorama, of all places. An astronomy piece by Miss Cellania.

They referred to an article at the LiveScience web site. The article there is entitled Rarest planet in the universe may be lurking in Orion's nose by Brandon Specktor.

That article has links to a paper at Science (published Sep 3) and at the Astrophysical Journal Letters (from May 21). The first appears to be behind a pay wall but the second offers the full paper.

The paper is entitled GW Ori: Interactions between a Triple-star System and Its Circumtriple Disk in Action lead by Jiaqing Bi. From the abstract, the authors state "GW Ori is a hierarchical triple system with a rare circumtriple disk."

There appear to be three dust rings surrounding an AB-C binary where each disc is at different inclination angle from the others due to a tearing effect. This could be explained by a planet in the system.

If all this proves true, it'll be pretty neat. And again shows that there is infinite variety out there. 

This stuff has been the domain of science fiction...

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Spotted a post at AstronomyNow on the subject.

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I just had a thought. Are we seeing the normal formation of a proto-solar system wherein comets are allowed?

Friday, September 04, 2020

tag weirdness

Things were going pretty good with the blogger back-end.

But a few days ago they did something to the labels. Now when I add or edit an article, the labels section says "No matching suggestions." Are these tags lost? Will I have to recreate them?

It's not obvious how to add tags to new posts. Old posts appear to hold their tags but I dare not edit them. 

The label cloud, from the front end, seems fine. So for the viewer all seems well.

let's settle this

OK. I think I've had enough of this...

Recently, I've heard a few people say that large aperture telescopes cannot render good views because they are susceptible to bad seeing conditions. A larger aperture means the tunnel of air you're looking through is bigger.

I am not convinced. A bigger 'scope means better resolution. I'll take resolution thank you. And greater light gathering capability.

Any telescope on the ground will be affected by seeing conditions. So be it.

That's what's so great about Environment Canada's weather tools: it predicts seeing quality.

Yes, the biggest telescopes on the planet use lasers and adaptive optical systems to correct for the air.

Anyway, I'm going to research this... I'm going to see if I can find empirical studies on this. I think most people are speaking from anecdotal experience.

Stumbled across an interesting statement by "TOMDEY" in Cloudy Nights.

What [people don't] take into account are the ~moments~ of good, great, excellent seeing.  So, if you dwell on a target long enough, patiently enough, with a giant scope at higher mag...  you will see far more than the little ones can ever see.

Bingo. That's good.

And that speaks to the entire visual system, the telescope, eye, and brain (arguably the most important part).

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Now, let's find scientific papers on the subject... If you know of any, share in a comment.