Caldwell 49 RGB+H-Alpha Also known as Caldwell 49 and NGC2237 in RGB and H-Alpha captured over 2 nights on the 22nd October and 14th November 2012 from my backyard observatory in Fremont, Michigan. Visible in this image are NGC2238, NGC2239, and NGC2246 and within the nebula the open star cluster NGC 2244. Total Exposure time 5 hours All exposures un binned (1x1) Luminance 6 x 5 min H-Alpha, 4 x 30 min RGB 5 x 10 min each QHY9M monochrome CCD cooled to -30C www.astrofactors.com Thomas M. Back TMB 92SS F5.5 APO Refractor Paramount GT-1100S German Equatorial Mount (with MKS 4000) Image Aquisition Maxim DL Stacking and Calibrating: CCDStack Registration of images in Registar Post Processing Photoshop CS5