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Thread started 06 Aug 2017 (Sunday) 22:50
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ISS passover with green flash

 
andicus
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Aug 06, 2017 22:50 |  #1

I took an untracked, long exposure image of the ISS passing over tonight. I noticed it flashed green as it was fading out.

I'm speculating that it's atmospheric distortion, similar to the effect of the green flash sometimes visible during sunset.

Anyone have any other ideas?

Full image, followed by a 100% crop of the flash.

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andicus
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Aug 08, 2017 21:04 |  #2

No one has any ideas? I thought someone would at least have a guess.


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Alveric
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Aug 08, 2017 21:49 |  #3

Maybe the astronauts were lasing you.  :p


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andicus
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Aug 08, 2017 22:37 |  #4

Funny enough, when googling to try and find out what caused this, there were other suggestions as to it being laser related. Obviously, it wasn't. :)


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Celestron
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Aug 09, 2017 08:14 |  #5

Perhaps its internal reflection ?




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andicus
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Aug 09, 2017 13:16 |  #6

No, this was clearly visible to the naked eye.


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Celestron
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Aug 09, 2017 15:21 |  #7

Well I guess you could contact NASA and send that picture and see if they can explain what it is .




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gjl711
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Aug 09, 2017 15:27 |  #8

I'm guessing that the sun reflected off of the solar arrays just right as they are very reflective.


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andicus
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Aug 10, 2017 00:21 |  #9

There is reflection from the panels, but why did it turn green for an instant?

I have submitted the question to NASA. Hopefully they answer. They don't allow you to submit links on the question form, so I couldn't provide the image.


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RedHeart
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Aug 18, 2017 14:56 |  #10

Don't expect them to reply with the truth. It was a alien vessel powering up their engines before leaving :-P:-P




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saea501
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Aug 18, 2017 15:08 |  #11

I shot it a month or so ago but didn't get any anomalies.

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andicus
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Aug 20, 2017 13:38 |  #12

Still haven't heard anything from NASA. I believe they say it could be 10-15 days for a response.

saea501, one thing that's different between our shots is that mine shows the ISS entering the Earth's shadow. It looks like your exposure stopped before that was the case, as there is no fadeout. My suspicion is that the green flash was due to the the light from the sun passing through the atmosphere, so it would coincide with the fadeout.

Hopefully I'll get an answer, soon.


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andicus
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Sep 14, 2017 10:02 |  #13

Well, after a month I received a disappointing response for NASA. Sounds like they just saw the term ISS and responded with a form letter about it. Why even have an "Ask NASA" section if they're not going to attempt to answer your question?

I'll try asking in one of the Astronomy forums.

Thank you for your email to NASA. Apologies are extended for the delay in responding, as NASA receives thousands of inquiries each week from across the United States and around the world.

For more information about the International Space Station go to: http://[URL]www.nasa.g​ov/mission_pages/stati​on/main/ (external link)

To apply online for an opportunity to speak with a member of the International Space Station crew go to:https://[URL]www.nasa.​gov ...centers/johnson/dow​nlinks (external link)

NASA encourages you to visit www.nasa.gov (external link) to learn about the exciting work NASA is doing. NASA also invites you to consider using one or more of the following easy and convenient communications tools for receiving NASA Updates.

· Subscribe to E-mail Delivery – Simply go to www.nasa.gov (external link), enter your e-mail address, set your delivery preferences, and choose your area(s) of interest.
· Receive Updates by RSS (Really Simple Syndication) – NASA RSS Feeds are available at [URL]http://www.nasa.gov (external link)/rss/index.html.
· Join Twitter at http://twitter.com/NAS​A (external link).

Your interest in NASA is greatly appreciated.

Sincerely,

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troypiggo
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Sep 14, 2017 23:57 |  #14

Are you sure it was the ISS you shot there? It's brightness is very constant as it passes over. More like the example saea501 posted above.

Your shot seems to show it bright then trailing off. Perhaps more like a tumbling type satellite or iridium flare? May also explain the flash of colour?


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andicus
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Sep 15, 2017 00:55 as a reply to troypiggo's post |  #15

Absolutely. I had checked for passes on Heavens-Above.com, so I was setup to shoot it. The only Iridium flare that night was about an hour after this, and was barely visible from my location. This was pretty much directly overhead.

The reason it faded out is that it went into shadow.


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ISS passover with green flash
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