Messier 33, Triangulum Galaxy

Unguided, 203 x 15 second JPEG frames, roughly 51 minutes of exposure, 1600 ASA, with noise reduction enabled.

This was a fairly dim object, even though it is listed at about magnitude 7. Could stand to get twice as many exposures to bring out more detail. Still, a really spectacular face-on spiral galaxy. It has also been referred to as the Pinwheel Galaxy, even though Messier 101 is officially recorded with that name.