NGC 7538 in Cepheus
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Scope: C8 203mm at f/7.3, Location: Laguna Mountains, CA 28 June, 2008, Camera: Artemis285
Exposure: 8 x 8 min H-Alpha (1x1), 8 x 1.5 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. Final LRGB combine was done in Photoshop using Luminance Layering in LAB color Space. A color adjustment made to correct the color at low RGB signal levels. A light background noise reduction was applied in PixInsight LE (SBNR). . Final Image size is approximately 1392x1040.
North is up in this image. The field in this image is from the constellation of Cepheus. The object in this image, NGC 7538, is an emission nebula. This is a smaller object among other nearby emission nebulas - the "Bubble Nebula" and the "Squid Nebula". This image replaces and earlier image that can be seen here. The Horizontal FOV is 21'.
Image center is located approximately - Equatorial 2000: RA: 23h 13m 30s Dec: +61°31'00"
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