Last Monday I was up all night using my new cable for my Canon DSLR to take long exposure sky shots. I took a 4 minute exposure (telescope is an 11 inch Schmidt Cass) of the Whirlpool Galaxy. In the 10 oclock position, there's a star that seems to be in the Hubble shot, but its far far brighter than in the Hubble, while other stars/nebula seem comparable. Is it a supernova of the brightish star in the Hubble shot? I can't rationalize it to be anything else.