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Need help identifying what crossed my frame

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#1 ravenhawk82

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Posted 16 April 2021 - 08:59 PM

Hey all,

Yesterday morning I caught something crossing my frame that I'm trying to identify while imaging Markarian's chain. Each frame is 60s, so it took roughly 5 minutes to cross the field of view and pulsed in brightness over a 120s period. The frames are approximately 1*57'x1*20', according to Stellarium (ASI294 chip behind a 560mm scope). The first frame was taken at 02:07:11AM and the last frame at 02:11:17AM, pacific standard time. I checked this time period in Stellarium and didn't see any satellites there, but I'm sure there are better sources that I'm not familiar with. I suspect something tumbling in space as that would explain the shifts in brightness... perhaps a spent rocket stage? These are screencaps of the unprocessed subframes but I can provide the FIT files if those would help.

Thanks in advance! And if there is a better forum I should be asking this in please let me know, I wasn't sure.

Edit- Forgot to mention that these were taken from St Helens, Oregon, USA.

 

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Edited by ravenhawk82, 16 April 2021 - 09:02 PM.


#2 *skyguy*

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Posted 17 April 2021 - 09:54 AM

Looks like you picked up Falcon 9 R/B #42968. As you mentioned ... it's tumbling rocket body (R/B). The attached plot is for St Helens, Oregon on 4/15/2021 starting at 2:07:32 AM.

 

Nice catch ....

 

Falcon_9_R-B.jpg


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#3 tomb18

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Posted 17 April 2021 - 10:43 AM

Hi I saw this a few times this spring, imaging Markarians Chain as well.
I saw this over a couple 5 minute shots.
Tom

#4 ravenhawk82

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Posted 17 April 2021 - 12:12 PM

Looks like you picked up Falcon 9 R/B #42968. As you mentioned ... it's tumbling rocket body (R/B). The attached plot is for St Helens, Oregon on 4/15/2021 starting at 2:07:32 AM.

Wow! Thanks for helping figure that out :D Where did you go to get that plot? That's a pretty handy resource to have



#5 *skyguy*

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Posted 18 April 2021 - 08:22 AM

Wow! Thanks for helping figure that out laugh.gif Where did you go to get that plot? That's a pretty handy resource to have

I use TheSky6 planetarium program to plot out the "Full Catalog" of satellites. rocket bodies and debris (21,000+ entries) which I download from space-track.org. Any planetarium program that handles earth orbiting satellites will have similar plotting capabilities.


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#6 ravenhawk82

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Posted 18 April 2021 - 06:47 PM

I use TheSky6 planetarium program to plot out the "Full Catalog" of satellites. rocket bodies and debris (21,000+ entries) which I download from space-track.org. Any planetarium program that handles earth orbiting satellites will have similar plotting capabilities.

Thanks! I'll look into this. Stellarium shows where a lot of satellites are but doesn't seem to list rockets and debris, so I'll see about getting this for the next time I find something weird :)




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