The large and extremely dim supernova remnant Simeis 147, also known as Sh2-240. East of the supernova remnant is the small and bright emission nebula Sh2-242.
Date: March 2, 2013
Constellations: Taurus and Auriga
Location: Dominion Astrophysical Observatory, Victoria, BC
Optics: Borg 77EDII, f/4.3, with Baader Planetarium Narrowband 7nm H-Alpha filter
Mount: Paramount ME, guided using PhD
Camera: Hutech modified Canon EOS 5D Mark II
Exposure: 10 light frames of 600 seconds, ISO 1600
Processing: Light frames calibrated with dark and flat frames in ImagesPlus. Light frames normalized and combined using MinMax Excluded. Image cropped.