NGC 6604 in Serpens
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Scope: MegRez II 80mm at f/4.9, Location: Laguna Mountains, CA 3 May, 2008, Camera: Artemis285
Exposure: 8 x 9 min H-Alpha (1x1), 8 x 1 min RGB Exposures (2x2).
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. Short RGB exposures were used mainly for star color. HA was mixed to red and blue channels with star mask. Final LRGB combine was done in Photoshop using Luminance Layering in LAB Color Space. A light background noise filtering was applied with PixInsight LE (SGBNR). Selective sharpening was applied to nebula features in Photoshop with a layer mask. Final Image size is approximately 1040x1392
North is up in this image. The field in this image is in the constellation of Serpens. NGC 6604 is an Open Star Cluster. It is located near the center of the image. There is a good deal of nebulosity surrounding the cluster consisting mostly of Hydrogen energized to emission. The nebulous regions are cataloged in Lynd's Bright Nebula catalog as LBN 72 (upper) and LBN 71 (lower left). The Horizontal FOV is80'.
Image center is located approximately - Equatorial 2000: RA: 18h 18m 39s Dec: -12°16'48"
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