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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: +61°51'24"