M101 (also called the Pinwheel Galaxy or NGC 5457) is a spiral galaxy approximately 21 million light-years away. A Type Ia supernova occurred in August, 2011. I took the image of the supernova (see below) on September 22, 2011.

Technical Information
Date:                         April, 2011
Location:                  Green Valley, Arizona
Telescope:                Takahashi TOA 130F
Camera:                    SBIG ST-200XM
Filters:                       Astrodon Gen 1
Mount:                      AstroPhysics 1200
Exposure:                  LRGB = 390:60:60:60 minutes, all unbinned
Software:                   Acquisition: Maxim DL 5, TheSky6
                                   Processing: CCDStack, PhotoShop CS3 with various plugins
The Pinwheel Galaxy (M101)