Sharpless 187 in Cassiopeia



Scope: Megrez 80  mm at f/5,  Location: Blair Valley, Anza Borrego Desert, CA  9 October,  2010,   Camera: Artemis285

Exposure: 8 x 7 minutes Luminance exposures (1x1), 8x7 minutes H-Alpha (1x1), 7 x 3 minutes RGB Exposures (2x2), 

Processing: Images were captured  with Artemis Capture (as FITs).  Aligned/stacked and dark subtracted in Astroart with Sigma Combine.   Luminance, H-Alpha,  and Color channels were scaled and  color balanced in Astroart.   Channels were co-registered in Astroart.   Luminance construction consisted of the luminance exposures only - H-Alpha exposures did not contain sufficient signal to add anything to the Luminance data.  Curves and Levels applied in Photoshop to the Luminance construction to optimize object features.  A light background noise reduction was applied to the Luminance construction .   Final LRGB combine was done in Photoshop  using Luminance Layering.  Color adjustment performed on the nebula portions of the image after luminance blending.  A light sharpening  was selectively applied to the final image.   Final Image size is approximately 1400x1056. 

 North is up in this image. This is a combination dust obstruction and faint hydrogen emission complex. The red areas are H-Alpha emission. It is  catalogued by as a Sharpless object - SH2-187.  This region is located in the constellation of Cassiopeia.    The Horizontal FOV is 75'.

Image center is located approximately - Equatorial 2000: RA: 01h 23m 07s Dec: +6151'24" 


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