Sh2-54 Region in Serpens



Scope: Megrez II  at f/5.1,  Location: Blair Valley, Anza Borrego Desert, CA   16 September 2006,   Camera: Artemis285

Exposure: 7 x 420 sec H-Alpha (1x1),  5 x 180 sec IR/UV Block Filter (1x1), 6 x 120 sec RGB Exposures (2x2). 

Processing: Images were captured  with Artemis Capture (as FITs).  Aligned/stacked in Registax 3 and saved as FITS. Luminance,  H-Alpha, IR/UV Block,  and Color channels were scaled and  color balanced in Astroart. Channels were co-registered in Astroart.  Curves and Levels applied in Photoshop to optimize object features. Luminance construction consisted of the H-Alpha exposure mixed with the IR/UV Block exposure. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB) - G2V calibration factors and Atmospheric Extinction factors were applied. I also applied hue restoration to correct any shift introduced in the LRGB. Sharpening was applied to nebula features in Photoshop with a layer mask.  Noel's Astronomy tools Deep space NR applied 50% to the final image.  Final Image size is approximately 1392x1040.

All exposures in this image were guided; North is up in this image. This region is dominated by an emission cloud in this region. The region is in Lynd's catalog (LBN72) and Sharpless' catalog (Sh2-54). The cluster of stars on the lower edge (center)  is NGC 6604. This region is in the constellation of Serpens just north of M16.  The Horizontal FOV is 78'.

Image center is located approximately - Equatorial 2000: RA: 18h 18m 09s Dec: -1147'56"


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