Amateur ISS spotting, Amazing details visible thru backyard scopes now |
Amateur ISS spotting, Amazing details visible thru backyard scopes now |
Mar 22 2009, 12:25 PM
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#1
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Been watching the ISS go over the past couple of nights and it's now fantastically bright. Many amateur astronomers are now training their 'scopes on the ISS and photographing it, achieving stunning results like this...
http://spaceweather.com/submissions/large_..._1237676263.jpg Interesting to see how golden and shiny the new panels are in those images... have the others been "dulled" by exposure to the environment of space, or is there some other reason..? -------------------- |
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Mar 22 2009, 01:16 PM
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#2
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Member Group: Members Posts: 753 Joined: 23-October 04 From: Greensboro, NC USA Member No.: 103 |
A quick reply before this topic gets shut down ...
I think the color difference is a result of the angle of reflection - notice that it's only one side of the new panels that are golden, as are the same side of the S5 panels, which have been up there for a while. -------------------- Jonathan Ward
Manning the LCC at http://www.apollolaunchcontrol.com |
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Mar 22 2009, 01:38 PM
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#3
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
I think this topic is pretty safe; I am just talking about visual observations through a telescope, not passing comment on manned spaceflight issues.
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Mar 22 2009, 01:57 PM
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#4
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Member Group: Members Posts: 593 Joined: 20-April 05 Member No.: 279 |
What I've found surprising about the recent - gorgeous! - views, is that it's undeniably different to point-source stars and little satellites, yet human visual acuity suggests 100m at (my latitude's average) 700km range is j-u-s-t below the point at which "size" becomes apparent.
Mind you, that's on a par with crescent Venus, so presumably it's a "large source" partially overcoming "twinkling-atmospheric-turbulence" thing? Andy |
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Mar 22 2009, 02:13 PM
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#5
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Senior Member Group: Moderator Posts: 4279 Joined: 19-April 05 From: .br at .es Member No.: 253 |
I have to agree with Ilbasso that the effect is due to angle of reflection and the first picture is the best example. The second image (actually a composite) is not so overexposed and the different pointing of each individual array wing can be easily seen.
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Mar 22 2009, 02:15 PM
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#6
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The Poet Dude Group: Moderator Posts: 5551 Joined: 15-March 04 From: Kendal, Cumbria, UK Member No.: 60 |
Good explanations. I just wondered.
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Mar 22 2009, 05:52 PM
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#7
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Senior Member Group: Members Posts: 1417 Joined: 26-July 08 Member No.: 4270 |
It's definitely just reflection angle that makes the solar arrays a different colour. Note that colour differences are observed between the 'forward' and 'aft' section of the solar array wings, however for a single solar array wing, both the front and back section has been in space the same length of time.
The colouration of the arrays in the linked images is thus inconsistent of being affected by the length of time they were in space. -------------------- -- Hungry4info (Sirius_Alpha)
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Mar 22 2009, 05:56 PM
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#8
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
Can binoculars see that kind of detail?
Is 30x enough to see some detail? |
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Mar 22 2009, 09:49 PM
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#9
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Member Group: Members Posts: 646 Joined: 23-December 05 From: Forest of Dean Member No.: 617 |
We've had nice clear skies here for the last couple of nights, and I helped my parents see their first ISS passes last night (mag -2.3) and tonight (-2.4.) Tonight Dad came equipped with some rather elderly but good quality 30x binoculars, with which I /think/ I could just about discern an H shape... although it could have been wishful thinking. Both experimental subjects reported their surprise at it's brightness and clarity, and that they found it interesting and enjoyable. (They've spent much of today calling round various friends and family excitedly suggesting they take a look, too. Hey, it's a quiet village!)
It's amazing how simple outreach can be. $heavensabove++ ! I'm starting to have crazy daydreams about trying to get framegrabs from a cheap webcam plus some kind of telescope, and learning how to stack frames. Some of the ground-based images out there are astounding (and of course there are plenty of interesting unmanned s/c to try to get!) Anyone here tried it? [Edit - snip unfortunate evidence of why UMSF does not go with G&T ] -------------------- --
Viva software libre! |
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Mar 22 2009, 11:00 PM
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#10
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
I'd like to say thanks to Stu for the reminders about when to look. I've been looking with x10 binoculars. It moves fast and anything more would make it pretty hard to catch without clever automation. X10 is easily enough to see some shape.
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Mar 23 2009, 03:16 AM
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#11
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Senior Member Group: Members Posts: 1276 Joined: 25-November 04 Member No.: 114 |
I had 2 chances tonight.
It's was to fast for any detail. |
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Mar 23 2009, 08:07 AM
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#12
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Rover Driver Group: Members Posts: 1015 Joined: 4-March 04 Member No.: 47 |
I saw ISS on Friday. It was amazingly bright. Quite a sight.
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Mar 23 2009, 10:05 AM
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#13
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Member Group: Members Posts: 593 Joined: 20-April 05 Member No.: 279 |
A quick google suggests there is definitely "shape" with image-stabilised binoculars of 12 times magnification.
Andy |
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Mar 23 2009, 10:17 AM
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#14
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Member Group: Members Posts: 378 Joined: 21-April 05 From: Portugal Member No.: 347 |
I've tried with 10x50 binoculars on tripod and the station moves too fast through the field of view to see any details.
Using my hands, even with a firm support, I never saw any defined shape. Perhaps my old Hi8 video camera with 10x image stabilized optical zoom might record something :-) Nevertheless the view is tremendous with the naked eye alone... specially if the shuttle is close to the station. Then you get to see both moving through the sky in tandem. Awesome sight. -------------------- _______________________
www.astrosurf.com/nunes |
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Mar 23 2009, 10:48 AM
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#15
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Senior Member Group: Members Posts: 3516 Joined: 4-November 05 From: North Wales Member No.: 542 |
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