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Starlink? Asteroids? Space Junk? What did I capture

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#1 Voska

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Posted 27 February 2021 - 04:57 PM

Ok so my initial thought is this was a starlink train... BUT I have captured a starlink train before and it did NOT look like this.

https://drive.google...iew?usp=sharing

 

That is the link to the video file i created using PixInsight.

things to note here... this is with a WO RedCat51 with an ASI 294MM
there are 4 total frames.
each frame was 5 MINUTES long so a total of 20 minutes for these objects to pass by

this is my green filter imaging the Horsehead/Flame nebula 

2021-01-22 @ 21:50 - 22:07 PM CST (Chicago area)

any thoughts?


Edited by Voska, 27 February 2021 - 05:12 PM.


#2 Cali

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Posted 27 February 2021 - 05:16 PM

Looks like Starlink to me.

 

- Cal



#3 GregsCNAccount

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Posted 27 February 2021 - 05:18 PM

If the objects were moving at a constant speed through your field of view, I would expect them to be elongated streaks in each 5 minute image.  Instead you have a line of dots that jump in position from one frame to the next.  Are you sure you didn't have four short exposures that were spaced 5 minutes apart?



#4 Voska

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Posted 27 February 2021 - 05:42 PM

If the objects were moving at a constant speed through your field of view, I would expect them to be elongated streaks in each 5 minute image.  Instead you have a line of dots that jump in position from one frame to the next.  Are you sure you didn't have four short exposures that were spaced 5 minutes apart?

all images were taken at 300 second exposures. I have other images from that night of a plane as well as a few satellites crossing the image all streaking and going different ways. I am 99.9% confident these exposures were 5 mins each 



#5 ravenhawk82

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Posted 27 February 2021 - 05:49 PM

If the exposures were 5 minutes, that was likely a plane going overhead. The nav lights will blink, so you'll get a series of dots in your long exposure instead of a solid streak. The only other way you'd get that output from a 5 minute exposure is if there were multiple objects hanging perfectly still in a line. Barring an impending alien invasion, this seems unlikely ;) My guess is a plane.

Also, at the focal length you're at, you'd only see one or maybe two Starlink satellites in the frame at a time. Seeing so many dots close together like this makes me think it's one object blinking across the sky.



#6 Voska

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Posted 27 February 2021 - 06:11 PM

for reference here are some images which show a plane, and two different satellites 

Plane

Plane
Satellite 1
Satellite 1
Satellite 2
Satellite 2


#7 GregsCNAccount

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Posted 27 February 2021 - 06:37 PM

In frame 2 I count 14 dots and in frame 3 I count 13.  With 300 second frames that makes the period that the object would have to flash at to be in the the range of about 21-23 seconds.  That's way too slow for an aircraft strobe.  I have observed tumbling satellites that flash brightly once per revolution.  Perhaps that's what this is.



#8 Voska

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Posted 27 February 2021 - 07:10 PM

In frame 2 I count 14 dots and in frame 3 I count 13.  With 300 second frames that makes the period that the object would have to flash at to be in the the range of about 21-23 seconds.  That's way too slow for an aircraft strobe.  I have observed tumbling satellites that flash brightly once per revolution.  Perhaps that's what this is.

I was kind of thinking something like this or space debris. but again with it being over 10 minutes (assuming it came into the image at the end of 1 image and was leaving at the beginning of the 4th image) to cross the field of view. how slow/high of orbit would it have to be to do that? are there any sources i can use to make look up and see what satellites might have passed by the target on that night?

I see in Stellarium that at 22:17  the MUOS-1 satellite passes just in a corner of the frame, but wrong time and wrong location for this particular object in the video.



#9 Phishin_phool

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Posted 27 February 2021 - 07:34 PM

It is probably one of these:

http://stuffin.space/



#10 lkannard

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Posted 28 February 2021 - 08:46 PM

Starlink is the scourge of Astronomy.

We really need a James Bond Laser to blast them out of orbit.
  • acommonsoul likes this

#11 lkannard

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Posted 28 February 2021 - 08:46 PM

Starlink is the scourge of Astronomy.

We really need a James Bond Laser to blast them out of orbit.


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