Coma Cluster of Galaxies in Coma Berenices



Scope: C8 f/3.3; Location: Laguna Mountains, CA; 19 May, 2007; Camera: Artemis285

Exposure: 8 x 300 sec  Luminance exposures with IR Block Filter (bin 1x1); 5 x 150 sec RGB (bin 2x2) 

Processing: Images were captured in Artemis Capture (as FITs). Aligned/stacked in Registax 4 and saved as FITS. Luminance and Color channels were numerically scaled and  color balanced in Astroart.  Channels were co-registered in Astroart.  Central Gradient removal was performed on the L,R,G,B stacked masters. The IR Block exposure was used as the luminance channel. Curves and Levels applied in Photoshop to optimize object features.  Final LRGB combine was done in Photoshop using Luminance Layering (or LLRGB).  Light noise reduction was performed using PixInsight LE. Final touches were done in Photoshop.  Final Image size is approximately 1392x1040.

 North is up in this image. The Coma Cluster of Galaxies is in the Constellation of Coma Berenices. Most of the objects in the central part of the image are galaxies. As is typical for a galaxy cluster of this richness, most of the galaxies are ellipticals with few spiral galaxies. The two prominent elliptical galaxies toward the center are cataloged NGC 4889 (left) and NGC 4874 (right). The prominent galaxy in the lower left is NGC 4921.  The cluster's distance from Earth ranges from 320 to 370  million light years.  Horizontal FOV is about 46'

Image Center approximately - Equatorial 2000: RA: 13h 00m 08s Dec: +2758'35"


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