I just wonder if anyone could shed any light on this puzzle.

Two nights ago whilst I was out photographing the Lyrids meteor shower from the UK something else showed up on my images when I checked them the next morning. All images were 30-second exposures at ISO 2000 shot throughout the whole night with the intervalometer. It takes roughly two minutes for a satellite to pass through an image, so that's four images which you can see when viewing the images.

This started just after 01:00 and disappeared from the frame at 01:25.

Upon going through further I have a small speck starting from the top of image which continues through the image for 41 images; doing the maths, that's 20 minutes of something passing through the sky slowly.

It never continued all the way through, just slowly got darker. I was obviously set up towards the star Vega and the Lyra constellation. Any help would be greatly appreciated.

slow moving object over 20 minutes exposure

Cropped and rotated, showing broken trail:

slow moving object over 20 minutes exposure cropped and rotated, showing broken trail

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    $\begingroup$ See heavens-above.com/AllSats.aspx for your location. $\endgroup$
    – Mike G
    Apr 24, 2020 at 17:27
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    $\begingroup$ I've made some small edits please check. It's probably a silly question but are those times the same in UTC? Would you estimate the speed at about 1 degree per minute, or could you come up with a better number? Could you also mention the focal length and aperture of your lens? As mentioned in the other comment there are some slow moving satellites in high orbits but they would have to be quite high to move so slowly and therefore far away and dim. It could also plausibly be a near earth asteroid (since they're larger and potentially brighter but that would be something we'd read about. $\endgroup$
    – uhoh
    Apr 25, 2020 at 4:37
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    $\begingroup$ Also, you posted this question at 2020-04-24 16:35 UTC (Friday) and you say it was "two nights ago". Does that mean that you first recorded the object at about 2020-04-23 01:00 UTC i.e. Wednesday night/Thursday morning? $\endgroup$
    – uhoh
    Apr 25, 2020 at 4:40
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    $\begingroup$ hi there, yes your dates are correct and time.In terms of degrees a minute I am not to sure. I shot on a canon 5dmk 2, so a full frame camera at 24mm and 2.8 f. Last night I made a composite of the 41 images to see the final pass. Whatever it appears to be it does show very visible curvature, im not sure what that would mean, im guessing just that its higher up. On my 24mm image it still only goes through around a third of the image from top to bottom. Its starts from slightly to the left of Zeta Draconis and goes out of sight at next to HR 7187. Hope this can help you and other people $\endgroup$ Apr 25, 2020 at 8:22
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    $\begingroup$ Iv just been trying to find some more research and came across this. Does anyone think this may be what I have caught ? Any suggestions or help would be much appreciated.virtualtelescope.eu/2020/04/24/… $\endgroup$ Apr 25, 2020 at 21:25


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