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Scope: Megrez II f/4.6 Location: Dos Picos Park, Ramona, CA 8 July 2005 Camera: Artemis285
Exposure: 6 x 240 sec H-Alpha, 8 x 90 sec IR Block, 6 x 60 sec RGB Exposures
Processing: Images were captured Artemis Capture (as FITs). Aligned/stacked in Registax 3 and saved as FITS. Luminance, H-Alpha, and Color channels were scaled and rough color balanced in Astroart. Channels were co-registered in Astroart. The H-Alpha exposure was the main exposure for the luminance construction - the IR block exposure was combined with the H-Alpha for star depth with the fainter stars. Some star repair was performed. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB). Heavy dust and scratches HA channel (exposing nebula and eliminating stars) was partially subtracted from the green and blue channels to balance the red in the nebula. Color balancing and final touches were done in Photoshop. SGBNR was used to smooth background noise on the final result. Final Image size is approximately 1372x1022.
All exposures in this image were guided; North is up in this image. This object is Northwest of the star Sadr and the Gamma Cygni Nebula. It is cataloged as IC1318b and is part of the overall Gamma Cygni nebulous region. More information and images of the Gamma Cygni Nebula are here. The Horizontal FOV is 80'.
Image center is located approximately - Equatorial 2000: RA: 20h 17m 05s Dec: +41°49'05"