Not sure what i caught, but looks like a re-entry trail with a cloud remaining for a few minutes.

[ONIKKINEN]

 

Was taking 60s subs of abell 1656, the coma cluster and a bright trail caught my eye. Found it amongst the subs and saw that it left what looks like a trail of some sort that persists for at least 2 frames, but i think the third one still shows a mark of the event. There was a dither in between so possibly visible for more than 3 minutes. Re-entry of a space rock or one of Elon musks toys?

 

 

[MKHACHFE]

Interesting. Good catch mate