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Crab Nebula M1 in Taurus



Scope:  C8 at f/8, Location: Blair Valley, Anza Borrego Desert, CA   29 December, 2005  Camera: Artemis285

Exposure: 7 x 360 sec H-Alpha (1x1),  10  x 120 sec Luminance (1x1) with  IR/UV Block, 8 x 60 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, and Color channels were scaled and rough color balanced in Astroart. Channels were co-registered in Astroart.  In Photoshop, the H-Alpha exposure was the main exposure for the luminance construction - the  120 sec Luminance was blended with the H-Alpha exposure for filling out the nebula. Curves and Levels were applied in Photoshop to optimize object appearance.  Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB).  Color balancing and final touches were done in Photoshop.  Selective layer sharpening was performed on prominent nebula features. Final Image size is approximately 1412x1027.

All exposures in this image were guided; North is up in this image. The Crab Nebula is the remnant of a supernova that took place in 1054AD (observed by Chinese astronomers). It exists now as an expanding cloud of gas and stellar material from the supernova. Its distance from Earth is approximately 6,300 light years. This image replaces an earlier image that can be seen in the Archives here. The Horizontal FOV is approximately 18'.

Image center is located approximately - Equatorial 2000: RA: 05h 34m 32s Dec: +2200'52"


All images and content remain the property of Jim Thommes - copyright 2003 - 2012

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