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Scope: C8 at f/3.4, Location: Dos Picos Park, Ramona, CA 13 April 2007, Camera: Artemis285
Exposure: 8 x 360 sec H-Alpha (1x1), 6 x 120 sec RGB Exposures (2x2).
Processing: Images were captured with Artemis Capture (as FITs). Aligned/stacked in Registax 4 and saved as FITS. Luminance, H-Alpha and Color channels were scaled and color balanced in Astroart. Channels were co-registered in Astroart. Central Gradient removal was performed in Astroart. Curves and Levels applied in Photoshop to optimize object features. Luminance construction consisted of the H-Alpha exposure. Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB) - G2V calibration factors were applied. PixInsight SGBNR noise reduction was lightly applied to the background . Selective sharpening was applied to nebula features in Photoshop with a layer mask. Final Image size is approximately 1392x1040.
North is up in this image. This nebula structure is catalogued as NGC 2476 as well as one of the Sharpless objects - Sh2-311. It is located in the constellation of Puppis about 3 degrees southwest of M93. This object lies about 17,000 light years distant from Earth. This image replaces an earlier image of this region and can be seen in the Archives here. The Horizontal FOV is 45'.
Image center is located approximately - Equatorial 2000: RA: 07h 52m 52s Dec: -26°24'32"