The open cluster Messier 37
Date: March 29, 2013
Constellation: Auriga
Location: Dominion Astrophysical Observatory, Victoria, BC
Optics: TeleVue NP-127is, f/5.2
Mount: Paramount ME, guided using PhD
Camera: Canon EOS 5D Mark III
Exposure: 21 light frames of 180 seconds, ISO 800
Processing: Light frames calibrated with dark and flat frames in ImagesPlus. Light frames normalized and combined using MinMax Excluded. Image cropped.