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