Astrodvorek Kamenne Zehrovice

Hercules galaxy cluster Abell 2151 ,  Arp 272,  71,  122  a  172

Abell 2151, galaxy cluster in Hercules 

 

Abell 2151 The Hercules Cluster (Abell 2151) is a cluster of about 200 galaxies some 500 million light-years distant in the constellation Hercules. It is rich in spiral galaxies and shows many interacting galaxies. The cluster is part of the larger Hercules Supercluster, which is itself part of the much larger Great Wall super-structure. (wiki)
In the picture above you see the Abell 2151 wide field (north is to the left) and for interest I have here also marked (above Arp 71) rather bright quasar with redshift z=3 (light travel time > 11.5 billion light-years).

And yet other view on the cluster core with marked (and  well resolved) Arp's 272, 71 and 122 (from the Arp's Atlas of Peculiar Galaxies. The last one, Arp. 172, is the close pair of galaxies in the bottom right corner of the upper picture.

 

Abell 2151 Arps 

Exposure data:

                               Optics:       NoName Newton 192/800
                   +GPU c.c.
Camera:    Atik One 6
     Filters:        LRGB Baader
  Mount:      SW AZEQ-5
       Guider:       Lacerta MGEN
    Exposure:  53x5 min. (L)
                       16x5 min. (R, G, B each), bin 2x2
                     Software:  PixInsight, Photoshop
21. 5. 2018

 

  

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Memory: I can yet show you my first picture of this cluster from June 2014 (my first photo of any Abell cluster ever).
Nothing special, but the galaxies are (over half billon light-years) already well recognizable.
Data: APM Apo 107/700 and Canon 50D mod, 21x6 minutes at ISO 800.