Weird object near NGC5792

[cometcatcher]

Caught a mystery object last night. I was shooting galaxy NGC5792 (left) and found a glow around a mag 10 yellow star. Over a period of 27 minutes it drifted very slowly to the NW. Too slow for a cloud. I'm thinking rocket burn? Any launches last night?

Full field at Astrobin. http://astrob.in/185261/0/

[hobbit]

there was a soyuz launch on the 5th. don't know if it would still be visible last night though

[LewisM]

Looks like VERY thin ice cloud to me - these can move VERY VERY slowly.

[cometcatcher]

It would have moved only a couple of arc minutes over a duration of 27 minutes. It was taken around 8pm so would have been at the right angle for the Sun to illuminate from space.