M52 in Cassiopeia
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Scope: Zenithstar 66 mm APO at f/4.6, Location: Laguna Mountains, CA 2 July 2011 Camera: Artemis285
Exposure: 14 x 3.5 min (1x1 bin) exposure with UV/IR block, 8 x 2 min (2x2 bin) RGB exposures.
Processing: Images were captured with Artemis Capture (as FITs). Aligned/stacked and dark subtracted in Astroart with Sigma Combine. IR / UV Blocking filter and Color channels were scaled and color balanced in Astroart. Channels were co-registered in Astroart. Central gradient removal was performed in Astroart. Luminance channel consisted of the IR/UV blocking filter exposures. Curves and Levels applied in Photoshop to the Luminance channel to optimize star depth. Earlier image data at higher resolution was used for luminance at the star cluster to help better resolve the stars. Final LRGB combine was done in Photoshop. Final Image size is approximately 1800 x 1350.
North is up in this image. The star cluster M52 is located centrally in this image. The red nebula in the lower right is commonly known as the Bubble Nebula (NGC 7635). This star field is located in the constellation of Cassiopeia. This is one of two Messier open clusters in Cassiopeia (along with M103). M52's distance to Earth is not precisely known but generally considered to be about 5,000 light years. This image replaces and earlier image of the object posted here. Horizontal FOV is 100'
Image center is approximately - Equatorial 2000: RA: 23h 24m 12s Dec: +61°35'00"
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