Image is link from Dr. Richard Steinberg’s website at Drexel University. It is the combination of (I think) 52 two-second exposure images of asteroid 2007 TU24. Serendipitously caught in the image are NGC 634 and its most recent supernova, SN2008A. (The cross hairs in this image mark the Supernova). If you click on the image it will take you to an animated gif of the asteroid moving through the sky.
Giant hat type to Derek C Breit who posted this on the AAVSO-Photometry listserv.