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Scope: WO Megrez II 80 mm APO at f/5.2, Location: Laguna Mountains, CA 16 August 2009 Camera: Artemis285
Exposure: 12 x 8 min H-Alpha (1x1 bin), 6 x 3 min RGB Exposures (2x2 bin)
Processing: Images were captured with Artemis Capture (as FITs). Aligned/stacked and dark subtracted in Astroart with Sigma Combine. H-Alpha and Color channels were scaled and color balanced in Astroart. Channels were co-registered in Astroart. Luminance construction consisted of the H-Alpha exposure. Curves and Levels applied in Photoshop to the Luminance construction to optimize object features. Final LRGB combine was done in Photoshop using Luminance Layering in LAB color Space. Color balance (more red) was applied to nebulosity at low signal levels (where there was luminance data but little to no color data). Final mosaic combine was done in Photoshop. A light sharpening and noise reduction was applied to the final image. Final Image size is approximately 1368 x 1038.
All exposures in this image were guided; North is up in this image. LBN 251 is a region of emission nebulosity in the constellation of Cygnus. This image shows part of an extended region in Cygnus rich with nebulosity containing such renown objects as the Gammi Cigni Nebula and the Crescent Nebula. The Horizontal FOV is 75'.
Image center is located approximately - Equatorial 2000: RA: 20h 16m 57s Dec: +41°49'17"