NGC 457 - Owl Cluster in Cassiopeia
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Scope: C8 at f/5.8, Location: Del Mar, CA 9 October 2007 Camera: Artemis285
Exposure: 16 x 60 sec Luminance with IR Block Filter (bin 1x1); 8 x 60 sec RGB (1x1 bin)
Processing: Images were captured Artemis Capture (as FITs). Aligned/stacked and dark subtracted in Astroart with Sigma Combine. Luminance and Color channels were scaled and rough color balanced in Astroart. Central Gradient removal was performed in Astroart. Channels were co-registered in Astroart. The 60 sec IR block exposures were used as the main luminance construction with level adjustments and curves to bring out dim stars. Final LRGB combine was done in Photoshop. Final touches were done in Photoshop. Final Image size is approximately 1392x1040.
North is up in this image. NGC 457 is an open cluster located in the constellation of Cassiopeia. It is popularly known as the Owl Cluster and sometimes as the ET Cluster. The cluster is at a distance of about 9,000 light years from Earth. This image replaces an earlier image that can be seen in the Archives here. Horizontal FOV is 26'.
Image center is approximately - Equatorial 2000: RA: 01h 19m 33s Dec: +58°17'27"
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