NGC 6045 - The Hercules Galaxy Cluster. (astroeyes)

Celestial hemisphere: Northern · Constellation: Hercules (Her) · Contains: IC 1179 · IC 1182 · IC 1183 · IC 1185 · NGC 6040 · NGC 6041 · NGC 6044 · NGC 6045 · NGC 6047

NGC 6045 - The Hercules Galaxy Cluster., astroeyes

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NGC 6045 - The Hercules Galaxy Cluster.

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NGC 6045 - The Hercules Galaxy Cluster.

Not much chance of any imaging lately - rain, wind, full moon, clouds, etc. Good change to catch up on this one taken in June.

This must be one of the richest galaxy clusters in the sky. Abell 2151, the Hercules Galaxy Cluster, consists of hundreds of galaxies, some large some small, some bright some faint and many interacting examples.

In addition, it happens to contain 4 Arp pecular galaxies, Arps 71, 122, 172 and 272. Arp 71, 122 and 272 are included in my image.

Arp 71 comprises NGC 6045 and NGC 6045b, Spiral with small high surface brightness companion on arm; 6045 is mag.13.9, SB(s)c - 6045b is mag. 17.1, SO. There is another companion attached to the N of 6045.

Arp 122 consists of NGC 6040a and NGC 6040b, Elliptical close to and perturbing spirals; 6040a is mag. 15.1, SAB(s)c - 6040b is mag. 14.9, SAO pec. Note the connection between the 2 galaxies.

Arp 272 consists of NGC 6050 and IC 1179, Galaxies with connected arms; 6050 is mag. 15.4, SA(s)c - IC 1179 is mag. 16.0, SB(rs)cd. To me 6050 appears to also have an attached companion at the end of it's spiral arm.

This is such a rich field it's quite possible that almost every point of light is a galaxy!

My image 30 x 3 minute exposures reveals too many to identify in the time available - I've anotated up a few of the brighter ones and also 2 quasars that I found. The quasar N of Arp 71 is z=0.64, mag. 19, the quasar W of Arp 71 is z=2.99, mag. 19.5. Quite similar apparent brighnesses despite the vast difference in theoretical distance according to their redshifts. The estimated distance to the cluster is 300 or so MLy.

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NGC 6045 - The Hercules Galaxy Cluster.

NGC 6045 - The Hercules Galaxy Cluster.

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NGC 6045 - The Hercules Galaxy Cluster.

NGC 6045 - The Hercules Galaxy Cluster.

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