"M82: Cigar Galaxy in Ursa Major. HaRGB. No Luminance added. 0.46""/pixel image scale.  Astrodon 5nm Ha filter, 13 x 30 minutes, Unbinned 1x1. F/10, 2/17/2013.  Astrodon Red filter, 24 x 5 minutes, Unbinned 1x1. F/10, 3/9/2013.  Astrodon Green filter, 24 x 5 minutes, Unbinned 1x1. F/10, 3/9/2013.  Astrodon Blue filter, 27 x 5 minutes, Unbinned 1x1. F/10, 3/9/2013.   Celestron 8"" EdgeHD with Astro-Physics Mach1GTO GEM. Atik 460EX mono. Hutech OAG. Lodestar.   Captured with Nebulosity. Processed with PixInsight. PHD settings: RA Aggressiveness: 60, RA Hysteresis: 10, Max Dec Duration: 75, Min Motion: 0.70, Calibration Steps: 125msec, Auto/Resist Switching, Extreme dithering and Settled at < 0.5, 3 sec guiding exposure."