Just received CCD Stacks tutorials by Adam Block. Excellent stuff. I was playing around with old data on M16 when blinking I noticed this "star" moving. The motions is not that great over 2 hours total exposure time. 23 x 5 min subs between 22:30 27/09/2008 and 00:30 28/09/2008. See image attached. Larger field is available at
http://www.multiweb.com.au/astro/m16_mov_lg.gif
How can I identify this object based on date/time and location? Thanks for any pointers/links.