NGC 7635 "Bubble" Nebula
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Scope: C8 203mm at f/4.2, Location: Dos Picos Park, Ramona, CA 2 September, 2007, Camera: Artemis285
Exposure: 8 x 540 sec H-Alpha (1x1), 6 x 90 sec 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 (or LLRGB). Color adjustment made to correct the color shift created by Luminance application. Selective sharpening was applied to nebula features in Photoshop with a layer mask. Final Image size is approximately 1044x1392
North is to the left in this image. This is an object cataloged as NGC 7635 and is popularly known as the Bubble Nebula. It is located in the constellation of Cassiopeia and is at a distance of 7,100 light years distant from Earth. The bubble is formed by a Wolf-Rayet star's high speed stellar wind lighting up the surrounding material. This image replaces an earlier image that can be seen in the Archives here . The Horizontal FOV is 36'.
Image center is located approximately - Equatorial 2000: RA: 23h 20m 42s Dec: +61°12'00"
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