The Coma Cluster or Abell 1656 is a large cluster of galaxies that contains over 1,000 identified galaxies. The cluster's mean distance from Earth is 321 million light years.
The central region is dominated by two supergiant elliptical galaxies: NGC 4874 and NGC 4889.  Most galaxies are elliptical and SO galaxies, with only a few spirals of younger age.. (wiki)
I can add an interesting large spiral galaxy NGC 4921, situated beside the bottom left margin of the above picture.:

Optics:       NoName Newton 192/800
                   +GPU c.c.
Camera:    Atik One 6
Filters:        LRGB Baader
Mount:      SW AZEQ-5
Guider:       Lacerta MGEN
Exposure:  51x5 min. (L)
                    12x5 min. (R, G, B each), bin 2x2
Software: PixInsight, Photoshop

22 4. 2018

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