M51 plus Supernova 2011dh

This image of the Whirlpool galaxy M51 and the supernova 2011dh was taken at the Clubhouse after the Friday evening "Introduction to Astronomy DVD class". The 14.5 magnitude supernova was visually observed by many of the members present using the "light buckets" of Joe Henry's 15-inch  and Steve Clougherty's 18-inch Dobsonians. The type IIP supernova was discovered on May 30-31 by Amedee Riou and credit given to Tom Reiland, Amedee Riou, Thomas Griga, and Stephane Lamotte Bailey.

16 images  x 240-seconds subframe, Total= 1 hr. 4 minutes. TMB 92, f/5.5 plus field flattener, Unmodified Canon 20D DSLR, ISO 800, Processing by Images Plus 2.80 and Photoshop, ATMoB Clubhouse, Westford, MA, 3 June 2011