Tuesday, January 26, 2021

updated Stellarium shortcuts!

Well, it's high time that I update the shortcuts guide for Stellarium. I last did this in June 2020 for Stellarium 0.20.2 on Windows 10 and, arguably, not a lot has changed. But a couple of mistakes were uncovered. And I learned a couple of new shortcuts.

Also I wanted to embrace some that I have ignored before, like ones to do with the oculars plug-in and scripting. Plus, driving a mount (assuming one has made the proper connections). This makes this a major update!

I thank Ian Bain for this assistance in general and for specifically testing these on the Macintosh platform. Also, he tested the zoom-to-specific-FOV shortcuts!

This is an update of my keyboard and mouse shortcuts listing. This reference is for Windows and Macintosh computers. Linux users should be able to use the Windows method.

If you're on a laptop without a mouse, using a silly touchpad, you'll want to be comfortable with the supported gestures on the touchpad to simulate an external three-button mouse.

The "notes" column to the far right with numbers are keyed to the footnotes. For example, 1 is used to indicate newly added or recently changed items.

controlling the surroundings

*
show Location window
F6
Fn F64
toggle cardinal compass points   q q
toggle detailed compass marks Shift qShift q1
toggle ground and buildings
g
g
toggle ground fog
f
f
toggle atmosphere or air
a
a
toggle sky glow/building lights
Shift g
Shift g11
ground (mountain) labels
Ctrl Shift g
⌘ Shift g
return to "home" (start-up) view
Ctrl h
(none)2





controlling the sky - deep sky

toggle stars
s
s
toggle star labels
Alt s
Option s
toggle constellation lines
c
c
toggle constellation boundaries
b
b
toggle constellation labels
v
v
toggle constellation artwork
r
r
toggle asterism lines
Alt a
Option a
toggle asterism labels
Alt v
Option v
toggle ray helpers
Alt r
Option r14
toggle DSO/nebula labelsn or d
n or d
nebula background images
i
i
toggle quasars
Ctrl Alt q
⌘ Option q3,5
toggle pulsars
Ctrl Alt p
⌘ Option p1,5
toggle zodiacal light
Ctrl Shift z
⌘ Shift z
toggle Milky Way
m
m
toggle digital sky survey
Ctrl Alt d
⌘ Option d6
exoplanet labels, indicators
Ctrl Alt e
⌘ Option e5
show Sky and Viewing Options
F4
Fn F4





single constellation mode

remove previous constellations
w
w7
show all constellations
Alt w
Option w





the sky - solar system

toggle planets and Moon
p
p
toggle planet and Moon labels
Alt p
Option p
toggle planet markers
Ctrl p
⌘ p
toggle planet orbits
o
o
toggle star-lore planet names
Ctrl Shift n
⌘ Shift n
toggle planet trails
Shift t
Shift t
toggle planet surface labels
Alt n
Option n9
toggle meteor radiants
Ctrl Shift m
⌘ Shift m
toggle meteor radiant labels
Shift m
Shift m
import data from MPC
Ctrl Alt s
⌘ Option s1





controlling lines

toggle altitude/azimuth grid
z
z
toggle equatorial grid
e
e
toggle ecliptic line
, (comma)
, (comma)
toggle celestial equator
. (period)
. (period)
toggle meridian line
;
;
toggle horizon line
h
h





changing image presentation

flip horizontally
Ctrl Shift h
⌘ Shift h
flip vertically
Ctrl Shift v
⌘ Shift v
equatorial or azimuthal mode
Ctrl m
⌘ m
look to east (or n, w, s)
Shift e
Shift e
look up to zenith
Shift z
Shift z
look to NCP
Alt Shift n
Option Shift n
look to SCP
Alt Shift s
Option Shift s





zooming

zoom in
PgUp or
Ctrl Up Arrow

Fn Up Arrow
zoom out
PgDn or
Ctrl Dn Arrow

Fn Down Arrow
zoom in or out slowly
Shift with keys
Shift with keys
quickly zoom in/out
mouse wheel
mouse wheel
zoom close to selected object
/ (slash)
/ (slash)
zoom out fully
\ (backslash)
\ (backslash)
zoom very close to planet
/ twice
/ twice
set field of view (FOV) to 180°
Ctrl Alt 1
⌘ Option 1
set FOV to 90°
Ctrl Alt 2
⌘ Option 2
set FOV to 60° (naturalistic)
Ctrl Alt 3
⌘ Option 3
set FOV to 45°
Ctrl Alt 4
⌘ Option 4
set FOV to 20°
Ctrl Alt 5
⌘ Option 5
set FOV to 10° (binoculars)
Ctrl Alt 6
⌘ Option 6
set FOV to 5° (binoculars)
Ctrl Alt 7
⌘ Option 7
set FOV to 2°
Ctrl Alt 8
⌘ Option 8
set to 1° (lo-power telescopic)
Ctrl Alt 9
⌘ Option 9
to ½° (med-power telescopic)
Ctrl Alt 0 (zero)
⌘ Option 0 (zero)





panning

quickly pan celestial sphere
left-drag
drag
pan right
Right Arrow
Right Arrow
pan left
Left Arrow
Left Arrow
pan up
Up Arrow
Up Arrow
pan down
Down Arrow
Down Arrow
pan a small amount slowly
Shift Arrow-key 
Shift Arrow-key1





controlling time flow

set date/time to now
8
8
set time rate to zero
7
7
increase time flow
l (lower case L)
l
decrease time flow
j
j
run time at normal rate
k
k
increase time flow a little
Shift l (that's L)
Shift l
decrease time flow a little
Shift j
Shift j
drag for time
Ctrl drag
Control drag10
flip time direction
0 (zero)
0 (zero)





time with mouse... 

15
increase/decrease by minutes
Ctrl

increase/decrease by hours
Ctrl Shift
⌘ Shift
increase/decrease by days
Ctrl Alt
⌘ Option
increase/decrease by years
Ctrl Alt Shift
(none)





controlling "regular" time

show date/time window
F5
Fn F5
forward 1 hour solar
Ctrl = (equal)
⌘ =
backward 1 hour
Ctrl - (hyphen)
⌘ -
forward 1 day solar
= (equal)
= (equal)
backward 1 day
- (hyphen)
- (hyphen)
forward 1 week solar
]
]
backward 1 week
[
[





controlling sidereal time

forward 1 day sidereal
Alt = (equal)
Option = (equal)
backward 1 day
Alt - (hyphen)
Option - (hyphen)
forward 1 year sidereal
Ctrl Alt Shift ]
⌘ Option Shift ]
backward 1 year
Ctrl Alt Shift [
⌘ Option Shift [





working with objects

select an object
left-click
click
centre on selected object
spacebar
spacebar
toggle tracking of object
t
t
deselect object
right-click or
Ctrl Spacebar

⌘-click1,16
display search dialogue box
Ctrl f or F3
⌘ f or Fn F3
go, i.e. travel, to a planet
Ctrl g
⌘ g
toggle angular measurement
Ctrl a
⌘ a5
copy object info to clipboard
Ctrl Shift c
⌘ Shift c
add custom marker
Shift click
Shift click
remove custom marker
Shift right-click
Control Shift click
remove all custom markers
Alt Shift right-click
Opt. Ctrl. Sh. click





working with satellites

5
configure artificial satellites
Alt z
Option z
toggle satellite display or "hints"
Ctrl z
⌘ z
toggle satellite labels
Alt Shift z
Alt Shift z





using oculars

1,5
toggle ocular view
Ctrl o
⌘ o1
toggle crosshairs
Alt c
Option c1
show Telrad sight
Ctrl b
⌘ b1
rotate reticule clockwise
Alt m
Option m1,13
rotate reticule CCW
Alt Shift m
Option Shift m1,13





controlling the screen

toggle night (red light) mode
Ctrl n
⌘ n
toggle full-screen mode
F11
F118
toggle toolbars/menus, i.e. GUI
Ctrl t
⌘ t
save screenshot to disk
Ctrl s
⌘ s
toggle planet selection marker
Ctrl Shift p
⌘ Shift p
close a window/dialogue box
Esc
Esc





driving a mount

1,5
slew to selected object
Ctrl + number
⌘ + number1,12
slew to middle of screen
Alt + number
Alt + number1,12
show move or slew
telescope window

Ctrl 0 (zero)
⌘ 0 (zero)1
abort slew
Ctrl Alt Shift + ...
⌘ Op. Shift + ...1,12





scripting

show script console window
F12
(none)
pause script
Ctrl d, p
⌘ d, p1
resume script
Ctrl d, r
⌘ d, r1
stop script
Ctrl d, s
⌘ d, s1





controlling the application

show configuration window
F2
Fn F2
show help/about window
F1
Fn F1
keyboard shortcuts window
F7
Fn F7
show Astro. Calc. window
F10
Fn F10
show Bookmarks window
Alt b
Option b
show Exoplanets config window
Alt e
Option e5
show meteor settings window
Ctrl Alt Shift m
⌘ Option Shift m5
show meteor search window
Ctrl Alt m
⌘ Option m5
quit from Stellarium
Ctrl q
⌘ q


Notes:

  1. Recently added or changed shortcuts.
  2. On the Mac, the shortcut ⌘ h hides the app. This is an operating system shortcut.
  3. On the Mac, the shortcut ⌘ Shift q causes Stellarium to quit. 
  4. The operation of function keys on both Windows and Mac computers may require the use of a function or Fn key.
  5. Keyboard shortcuts associated with a plug-in. They may not function if the plug-in is not active.
  6. The digital sky survey layering feature refers to the display as a "hierarchical progressive" sky survey.
  7. The "remove" constellation shortcut applies when "single constellation mode" is active, as triggered in Configuration, Tools.
  8. The F11 does not work on iMac 21.5 and 2011 wireless keyboard.
  9. Referred to as surface "nomenclature" labels. This marks detailed surface features on planets, for example, Olympus Mons on Mars.
  10. On the Mac, only works when mouse is dragged horizontally. Only changes seconds.
  11. This is referred to as the "illumination" in a compatible landscape file.
  12. The number used to slew refers to the mount profile in the Telescopes window. If there's only one profile, it is simply Ctrl 1 or ⌘ 1. If a user has four telescope profiles and the fourth is to be used, then the user must press Ctrl 4 or ⌘ 4.
  13. This assumes one is showing the CMG or Meade astrometric eyepiece.
  14. Ray helpers example... "Arc to Arcturus."
  15. On Windows, roll middle mouse wheel up or down with overlay keys. On Macintosh, use overlay keys while performing two-finder swipe up or down on mouse.
  16. On click on nothing, if you can...

Some shortcuts were omitted.

Finally, of course, Mac documentation and keyboard labelling is inconsistent. We note the symbols below:

⌘ (cloverleaf) is the Command key,
      with the apple symbol on very old systems
⌃ (carat) is the Control key
⌥ is the Option (alt) or alternate key
⇧ (up arrow) is the Shift key
⇪ (up arrow with segments) indicates that the Caps Lock is used
fn or Fn is the Function key

Please report errors in the comments below...

§

See my "top" list for a very short collection of most frequently used, most helpful, techniques. Handy if heading into a presentation.

Monday, January 25, 2021

first run intermediate course

Taught my first-ever Stellarium intermediate level 2 course to RASC members. Very exciting. It went fairly well. Everyone showed up. Good questions. I was able to cover most of the content. I really wanted to show a connection to a mount and slewing. And it worked!

posted first doubles list for 2021

Prepared my double star "bulletin," the first official one 2021. It is a short list of suggested targets. I shared this on the RASC Toronto Centre forum. I post here for all.

§

Happy New Orbit!

The Moon’s bright again. Don’t despair; do doubles.

Here’s a short selection of double and multi-star systems from my life list for your observing campaign. I found them interesting.

  • θ1 (theta) Ori aka Trapezium or Σ748 (Struve), SAO 132314, HIP 26220: Can’t believe i never shared this, a seasonal fav. If you use high mag in good seeing, try to dig out 2 more stars.
  • BU 536 (Burnham) or HD 23479, SAO 76169, PPM 92858: Right in the middle of the pot or dipper of the Pleiades. The B star is a 1500 year binary but way too tight for regular telescope; the C and D partners are doable.
  • 17 CMa or H 5 65 (Herschel class V), SAO 172569, HIP 33248: A quad.
  • ψ 5 (psi) Aur or 56 Aur, SHJ 75, SAO 41330, HIP 32480: A pair.
  • σ2 - σ1 (sigma) Tau aka 92 and 91, STFA 11, SAO 94054, HIP 21683: Your naked eye challenge target, tighter than Mizar and Alcor, if you can’t split 'em, just do a little step up with binoculars.

Have a go. See if you can split them and detect colour. I hope you’ll share your discoveries.

Be seeing you.
Blake Nancarrow
astronomy at computer-ease dot com

Sunday, January 24, 2021

tested Ninja again

More testing with the yawning AV team. Shaking down OBS Ninja. Can it replace our meeting software. It is hard to say. It depends on the goals or needs... And, curiously, there seem to be some major performance-speed issues.

chatted about First Light

Had a good chat with Francois. He's very passionate about helping new members. Looks like RASC TC will be able to get the First Light program rejuvenated soon...

§

We updated Ian W, head of EPO. He reached out to the First Light planners.

Saturday, January 23, 2021

ran virtual SkyLab

Helped at the first Up In The Sky RASC event, in association with the Richmond Hill David Dunlap Observatory. Overall, things went well. In a Zoom meeting, we shared live telescopic views of celestial objects as well as pre-recorded views. We played Denise's excellent tour of the observatory as well as a video on getting started in astronomy. I ran a brief virtual sky display with Stellarium. It was great to interact with the customers and show them things they were interested in and curious about. 

I used Stellarium bookmarks for the first time!

Friday, January 22, 2021

adventure shared with ASCOM community

Woo hoo!

Looks like I hit the mark. 

Bob Denny on the ASCOM Talk Groups.io listserv released/shared my message, remarked it was quite an "adventure," and then updated the ASCOM mount drive page! The right audience, the right person!

Follow the direct link to the ASCOM group message, if inclined.

The updated ASCOM mount driver page text shows below:

updated text on ASCOM mount driver page

Look at that!

Oh that feels good, giving back.

I thanked Bob.

keep looking up

It occurred to me...

Astronomers have the much needed message for everyone right now:

Look up.

helped at planning meeting

Participated in the DDO planning meeting, for tomorrow's Up In The Sky event. Good session sorting technical issues and assigning roles and nailing down the script. Sounds like we'll have a decent turnout with customers too! Haven't seen Ron in a coon's age.

acknowledged the Journal team

Thanked James for the wood plaque. It is inscribed: "BLAKE NANCARROW In Appreciation for Contributing to the RASC JOURNAL."

Thursday, January 21, 2021

corruption close to home

I've been following this matter for a while. Today, it culminated in the resignation of Julie Payette from the Governor General role.

I'm disappointed that Ms Payette abused her position and power. 

She was something of a hero to me.

Sad day.

§

Learned she also held the role of viceregal with RASC. But she's been relieved of that post too. Very close to home.

a weird hop (Halifax)

Received more test images. The Hα are getting washed out by the moonlight but I'm still experimenting.

Yesterday received the L, HA, and OIII images with the offset 50,0. So left, east, in RA only by 50% from the centre of the Rosette Nebula. They worked fine.

planned vs actual offsets

Tonight I received a set with offset 135,0, once again from the same reference star HIP 31130. They are fine, not perfect, but further to the east, with some overlap.

Then I received the image with offset 50,85. Should have been immediately north of yesterday's image with a 15% overlap. Nope. It is well away with a huge gap!

I don't get it.

Reported it to the hu-mon.

I wonder if the percentage is according to the long edge...

Wednesday, January 20, 2021

received one experimental image request (Halifax)

The BGO worked one of the submitted Rosette experiment requests.

Offset from HIP 31130 in RA only by 50%. The mount moved left, or east, as expected.

The centre of the Rosette is to the right or west...

All, 60 second subexposures, 10 stacked shots, full frame. FITS Liberator, GIMP. North is up; left is east.

Rosette Nebula in luminance

Luminance.

Rosette Nebula in hydrogen alpha

Hydrogen. Wow.

Rosette Nebula in ionised oxygen

Oxygen. Hints...

Hey. They look good in terms of flats. Yeh.

That said, there appears to be some elongated stars. In all the images... Weird.

chatted with editor

My SkyNews editor and I bounced around some topic ideas... Observing during these interesting situations. Possibly for the magazine; maybe for the web site.

worked backstage

Helped sorta, at the RASC Toronto Centre Speaker's Night. I was the designated questioner but when it came my time to relay queries from the YouTube chat to quest professor Bozorgnia, they couldn't get my audio. Sheesh.

old microphone

Turns out the audio problem was at my end. Something in the audio subsystem of my computer failed. That was  disappointing. I had rebooted in the afternoon to freshen the Windows 10 on John Max. I had killed all unnecessary apps. I had chatted early in the Zoom backstage without issue. I had shared by camera in Zoom, then with OBS Ninja, without difficult. But, for some unknown reason, the audio, using the mic in the same TANDBERG camera, failed. After it all, when I crawled under the desk, disconnected and reconnected the camera-mic, it started working...

Fortunately, Dr Elaina Hyde stepped up. I was able to continue relaying questions, now to Hyde. It all worked out in the end but I was irked.

A fascinating talk on Dark Matter. And we had a good turnout with over 80 viewers on the livestream.

The raw recording is on YouTube.

trying vertical offsetting

Submitted another series of experimental image requests for the BGO.

This time I was interested in seeing if the vertical offsetting would work they way I wanted.

The offsetdec option was used. I'm looking for a positive value making the telescope shift position to the north...

I also requested the hydrogen-α and ionised oxygen filters be used. I'm assuming there will be lots of interesting stuff going on in the Rosette Nebula with hydrogen atoms...

And finally, I wanted to see if the image quality with the SBIG camera improved with a new flats run...

made a new plan

Made a new plan with various software tools...

After examining the first experimental images for the Rosette mosaic, I realised I need to redo the plan.

The SBIG camera sensor, in full frame mode, is not square. I had forgotten that assuming I would have equal vertical and horizontal measures like the Apogee camera, also attached to the BGO rig.

And when I see the pointing error of about 10%, I decided to up the overlap to 15.

I had also been thinking that three horizontal frames just wasn't enough.

It's a lot more work but I rejigged the whole plan: 4 horizontal and 5 vertical.

That all required either finding a new target centring star or using the current. I decided to stick with HIP 31130 and simply offset +/- 50% in RA from that.

Tried SkyTools 3 Pro but for some reason it failed. I was able to add the new camera to the telescope profile and it showed it as an option but it just would not select it and redraw the screen.

Things worked fine in SkyTools 4 Imaging.

new mosaic layout for Rosette Nebula

Pulled a full chart image and then camera FOV rectangle only into a PowerPoint file to plan out the mosaic.

flats on deck

Heard from the human overseeing BGO.

Assuming the run does not [hiccup] before morning, these will be re-generated at dawn.

Awesome.

I had asked if we could make new flats for the BGO SBIG camera. There were two big donuts.

§

Lookin' good. No donuts on 20 Jan '21.

asked about ASCOM mount driver description

Posted in the ASCOM groups.io listserv. I asked if an entry could be made in the Vixen SkySensor mount driver section that there was proven support for the IDEA GoToStar system.

Tuesday, January 19, 2021

completed horizontal offset test (Halifax)

I wanted to revisit offsetting with the Burke-Gaffney Observatory so to effectively produce a mosaic for the Rosette Nebula. I had some trouble with a past attempt... I don't think I had my wires crossed; I think the 'scope-mount went in the wrong direction. I wanted to be clear how the offset feature worked.

The documentation says use:

offset=offsetra,offsetdec

where a positive:

  • offsetra positions east, and,
  • offsetdec positions north.

I decided to overlap by 10%.

I chose HIP 31130 for the centre of the mosaic.

All images full size, in luminance, 60 second subexposures, 10 stacked shots. FITS Liberator, GIMP. North is up; left is east.

Of course, the centre image uses offset=0,0. It was captured at 22:38:17 AST.

The right frame was captured with offset=-90,0 on 23:12:46 AST.

And the left panel used offset=90,0, acquired at 23:55:57 AST.

small Rosette mosaic of three images using RA offsetting

It worked!

Well, the horizontal bit is fine. The -90 in the RA offset went west (right) with a decent overlap and the +90 went east.

But... why the heck did the image shift to the south?! Bad pointing? Bad plating solving? I didn't not request this. And it's a lot! If I'm trying to do a mosaic with just 10% overlap, uncalled shifts like this might leave gaps... Ugh.

And why the heck was I getting rectangles?! I looked up the specs of the SBIG camera. Oh... not square. The SBIG STXL-11002 is working at 2004x1336 (binned by 2) in full frame mode. Dang. That will impact the mosaic vertical plan...

It's also lookin' like I'm clipping the east and west edges of the nebula...

I also gathered RGB data.

Bad donuts. We need new flats...

no sync (Halifax)

Received an error message from the 'bot.

Subject:  BGO Robotic Telescope message
Date:  Tue, 19 Jan 2021 21:06:51 -0400
From:  Burke-Gaffney Observatory <bgorobot@ap.smu.ca>

#bgosays Error syncing telescope position while doing a special observation of NGC1023 (ID 13073)!  It will be tried again another night.

No worries.

I'm trying to get more data for the NGC galaxy...

downloaded February Journal

I downloaded the February 2021 Journal published by the Royal Astronomical Society of Canada.

cover for the February 2021 Journal
There are articles on the Order of Canada awards, the impact of lighting on plants and animals, and a retrospective on the Montréal Centre. I was fascinated by the old photos including Geoff Gaherty.

Lots of fantastic astroimages from Canadian photographers.

My Binary Universe column is entitled “He Who Controls the Spice Controls the Universe.” I review the Cosmographia application version 4.0 on a Windows computer. The SPICE-enabled 64-bit application is also available for Mac OS and Linux. I was pleased by the realistic views but was unable to get SPICE data from NASA or ESA added. Maybe someone else has accomplished this...

§

I understand the Journal is now available to the public. Enjoy!

Monday, January 18, 2021

tried again for NGC 1023 (Halifax)

Asked BGO to reshoot galaxy NGC 1023. A Finest target originally imaged in August 2016, the colour channel data was badly streaked. 

Resubmitted the job a few days back.

It came back with bad data again. Tracking problems in the red; green and blue sync errors. Not to mention donuts.

Was it the poor conditions? The CSC showed cloud: 70% covered; ECMWF: cloud 65%; transparency: too cloudy to forecast; seeing: bad 1/5; with the Moon altitude at 21.9. Hrrm.

received Mac serial device list

Ian B sent me another image, upon request. I had asked for a screen snap of the serial port menu. Holy Universe!

Stellarium mount configuration dialog box with communication menu shown

This shows the various active communication devices (and assumes the USB-serial adapter is connected). Bluetooth, wireless channels, etc. No modem in this case.

And this shot, like the previous, is the first time I've seen the communication menu Stellarium on a Mac. 

So amazing!

The "cu" item must be selected and not the "tty."

With this incredible snapshot, I can speak with confidence and complete my documentation.

§

The "cu" refers to Call Up for "outbound" communications from Stellarium. The "tty" might be used in a server scenario where one is waiting for an incoming call to be answered.

received Mac mount config profile

Ian B helped me confirm settings in Stellarium on a Mac to directly connect (with a USB-serial adapter) to a common telescope mount. Wow. Wow! He made my week!

He shared a screen snapshot. 

I have never seen this before.

mount profile in Stellarium on a Mac

We validated the process.

Note: This was tested on Stelleriam v0.20.3 and v0.20.4.

I was completely confident it would work but I needed to "see it in action" (as much as possible without getting together in the same room). It worked! Look at that...

Yes!

Saturday, January 16, 2021

enrolled people

Started slotting people from the waiting list into the 22 February Stellarium intro course. Felt good.

I suddenly realised a new... issue. There are so many interested RASC people and they are from far and wide, across Canada. I need to arrange courses by time zone! Huh.

now, Up in the Sky

Learned the DDO live telescopes view event coming up for 23 Jan has been rebranded "Up in the Sky." See the RASC Toronto Centre web page for more info including nice graphical card with Pleiades image by Francois.

Friday, January 15, 2021

imaged HR 890 again (Halifax)

Asked the robotic telescope at St Mary's University to image HR 890 again.

I first imaged this double star in Perseus, aka STF 331, February 2018. The files returned showed errors in the green data perhaps due to bad seeing.

Data looks better this time...

I'll try to make a colour image shortly...

shared the pin design

A couple of days back, Melody opened (reopened) the topic of a pin for the new Double Star observing program with RASC. Dave said it may be prudent to see what the uptake is first, before producing pins, as they are expensive. I uploaded my quick design to the shared folder for all the national observing committee members to view. Chris said it was "fantastic." Melody recalled it was "very classy." Bill agreed and thought it a "nice design." Dave shared costs and quantities, a neat trick to reduce costs, and who can next review the design for consistency. He thought it looked "great" and suggested a minor tweak. Randy jumped in, "Looks good!" Blair said he'd check on current quantities...

interested in STF 479 (Halifax)

Bright Moon time. I commanded BGO to image Σ479. This is from Haas. She describes this double star as a "close pair of white stars and a very wide brown-cherry star in an L-shape." Brown? Cherry-brown? Huh.

Aimed at HIP 18748 (or HD 25201) in Taurus.

triple star Struve 479 in luminance

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

A and B are at a 45 degree angle to one another. A is very slightly brighter to the north-west. B would have a PA around 135°. C looks like it is at about 240°. 7 or 8 times the AB separation.

SkyTools 3 Pro says this, from the Object Information box:

  • A is mag 6.5
  • B is mag 7.9, 7.4" at 127°
  • C is mag 9.0, 58.3" at 242°

When I point to the stars in the Interactive Atlas, I get the magnitudes:
  • A 6.5
  • B 7.7
  • C 9.4
Those seem like better numbers.

Shot the colour data channels at 3 times the duration.

I will assemble in colour as soon as possible...

§

Check out all the observing reports on the Spirit of 33 page.