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Abell 1656 is
located in the constellation Coma Berenices at a distance of 321 million light-years and
contains over 1,000 galaxies. The two giant elliptical galaxies at its center are NGC 4889
(left, magnitude 11.4) and NGC 4874 (magnitude 11.9).
14" LX200R/STL-11000M/Astrodon LRGB filters/Paramount ME
Exposures: Luminance 29 x 20 minutes, binned 2x2
Date: April 9, 10, and 16, 2010
Location: Landers, California, USA
Technical Notes: Individual exposures were obtained using CCDAutoPilot2 and then sigma combined. A high-pass filter of 4 pixels was applied to
selected portions of the image. Reduce Noise was applied to the dim portions with a
Strength of 5 and Preserve Details of 67%.