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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
approximately - Equatorial 2000: RA: 13h 00m 08s Dec: +27°58'35"