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Sharpless 2-155, Caldwell 9, The Cave Nebula

Submitted by Planewave Instruments

© Trottier, HowardI shot the Cave for more than 16 hours over four nights between August 26 and September 1 of 2011, but used only the best 10 hours for processing: 300 minutes in luminance (unbinned), and 100 minutes in each of R, G, and B. Ten-minute subframes were taken in all channels.

These images were again taken at my “Cabin in the Sky” observatory, using my PlaneWave Instruments CDK17 telescope, operating with a focal reducer at f4.5, on a Paramount ME, along with an SBIG STL-4020M camera. Image capture was done with TheSkyX, MaxIm DL, and FocusMax. Image processing was done entirely with PixInsight and CCDInspector. The field of view is about 27′ on a side, and the unbinned pixel size is about 0.78″.   Website