"The Wall" NGC 7000 in Cygnus
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Scope: Megrez II  f/6.25 and C8 f/3.1 Location: Del Mar, CA   25 August and 2 September 2005  Camera: Artemis285

Exposure: 8 x 300 sec H-Alpha (C8), 4 x 240 sec H-Alpha, 8 x 45 sec RGB Exposures

Processing: Images were captured on the two scopes with Artemis Capture (as FITs). The C8 H-Alpha images produce the best detail but corners are distorted. Aligned/stacked in Registax 3 and saved as FITS. Luminance, both H-Alpha,  and Color channels were scaled and rough color balanced in Astroart. Channels were co-registered in Astroart.  The C8 H-Alpha exposure was the main exposure for the luminance construction - the Megrez H-Alpha was used for edge stars since the C8 edges are distorted.  Due to the short RGB times, the HA exposure (with stars removed) was used as a "lighten" combine in the red 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. This object is part of the larger "North American" Nebula (NGC7000). The distinctive feature is the extended emission front running diagonally across the image from upper left to lower right.  The Horizontal FOV is 55'.

Image center is located approximately - Equatorial 2000: RA: 20h 59m 14s Dec: +4337'45"

 

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