Gamma Cygni Nebula IC1318
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Scope: Megrez II  f/3.2 Location: Laguna Mountains, CA   1 July 2005  Camera: Artemis285

Exposure: 5 x 240 sec H-Alpha, 8 x 72 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. There were difficulties with the focal reducer mount and possibly focus in the exposures. As a result, some star repair was performed. Trailed stars were repaired by a "Darken" recombine with a self image offset the direction of the trail. Also AstroPlugins Star Repair was used in Photoshop. These repairs were performed on the Luminance channel.  Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB).  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 1392x1040.

All exposures in this image were guided; North is up in this image. The bright star seen in this image is Gamma Cygni which gives its name to the nebulous area surrounding it. The star is also commonly known as Sadr. Sadr is about 1,524 light years distant. IC 1318 is an emission nebula with a dominate Hydrogen Alpha emission line. This image replaces an earlier image that can be seen in the Archives here.  The Horizontal FOV is 122'.

Image center is located approximately - Equatorial 2000: RA: 20h 24m 48s Dec: +4009'13"

 

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All images and content remain the property of Jim Thommes - copyright 2003, 2011

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