16h05m15s, +17° 44′55″| Hercules Cluster | |
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| Observation data (Epoch J2000) | |
| Constellation(s) | Hercules |
| Right ascension | 16h05m 15.0s[1] |
| Declination | +17° 44′ 55″[1] |
| Brightest member | NGC 6041 |
| Number of galaxies | 300[2] |
| Richness class | 2[3] |
| Bautz–Morgan classification | III[3] |
| Redshift | 0.03660 (10 972 km/s)[1] |
| Distance | 156 Mpc (509 Mly) h−1 0.705 [1] |
| X-ray flux | (15.00 ± 12.5%)×10−12 ergs−1cm−2 (0.1—2.4 keV) [1] |
| Other designations | |
| Abell 2151 | |
| See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters | |
The Hercules Cluster (Abell 2151) is a cluster of about 200 galaxies[4] some 500 million light-years distant in the constellation Hercules. It is rich in spiral galaxies and shows many interacting galaxies.[5] The cluster is part of the larger Hercules Supercluster, which is itself part of the much larger Great Wall super-structure.[6]
The cluster's brightest member is the giant elliptical galaxy NGC 6041.[7]
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