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Contains:  NGC 4944, NGC 4931, NGC 4929, NGC 4921, NGC 4895, NGC 4889, NGC 4874, NGC 4850, NGC 4848, NGC 4841, NGC 4839, NGC 4816
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Abell 1656 (Coma cluster), 





    
        

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Abell 1656 (Coma cluster)

Abell 1656 (Coma cluster)

Technical card

Imaging telescope or lens:GSO 8" f/5 Newton

Imaging camera:Canon 6Da

Mount:EQ8

Guiding telescope or lens:Asahi Super-Multi-Coated TAKUMAR 300mm f/4

Guiding camera:QHY5L-II Mono

Accessory:Baader MPCC Mark III Multi-Purpose Coma Corrector

Resolution: 1824x1170

Dates:April 20, 2015

Frames: 29x300" ISO1600

Integration: 2.4 hours

Avg. Moon age: 1.91 days

Avg. Moon phase: 4.09%

Astrometry.net job: 613863

RA center: 194.888 degrees

DEC center: 27.999 degrees

Orientation: 179.982 degrees

Field radius: 1.157 degrees

Description

The Coma Cluster (Abell 1656) is a large cluster of galaxies that contains over 1,000 identified galaxies. Along with the Leo Cluster (Abell 1367), it is one of the two major clusters comprising the Coma Supercluster. It is located in and takes its name from the constellation Coma Berenices.

The cluster's mean distance from Earth is 99 Mpc (321 million light years). Its ten brightest spiral galaxies have apparent magnitudes of 12–14 that are observable with amateur telescopes larger than 20 cm. The central region is dominated by two supergiant elliptical galaxies: NGC 4874 and NGC 4889.The cluster is within a few degrees of the north galactic pole on the sky. Most of the galaxies that inhabit the central portion of the Coma Cluster are ellipticals. Both dwarf and giant ellipticals are found in abundance in the Coma Cluster.

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Abell 1656 (Coma cluster), 





    
        

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