Moving Object Over M51

[silentrunning]

Can anyone identify the moving object in the animated GIF. I have overlaid some data from M51 from Thursday night with an image of M51 loaded from ESO DSS using Aladin. I believe the DSS image is from 1994 so it's 22 years between exposures. 

I guess it could be a star with a large proper motion?

John

[silentrunning]

Well I noticed the star in the very bottom right was moving to so I did some research and overlayed the Sinbad database on the images which includes proper motion info. This is great. It shows arrows for the proper motion directions and a number of stars have clearly moved in the right direction, strangely though the one I spotted appears to have no proper motion data...

 

[Ruud]

Wow, that's an interesting discovery!

[silentrunning]

I tested the technique on the centre of M45 with an image I obtained a couple of years so about 20 years between my one and the DSS and found stars moving around and reflecting the proper motion data...

 

 

[laudropb]

That's a very interesting capture.