| Hydra Cluster | |
|---|---|
 Central region of Abell 1060 (Hydra Cluster) with legacy surveys. The bright stars are HD 92036 (middle left) and HD 91964 (bottom) | |
| Observation data (Epoch J2000) | |
| Constellation(s) | Hydra |
| Right ascension | 09h 18.0m [1] |
| Declination | −12° 05′[1] |
| Number of galaxies | 157[2] |
| Richness class | 1[3] |
| Bautz–Morgan classification | III[3] |
| Redshift | 0.0548 (16,452 km/s)[1] |
| Distance | 58.3 Mpc (190.1 Mly) h−1 0.705 |
| X-ray flux | 6.1×10−11 erg s−1 cm−2 (0.5–2 keV)[1] |
| Other designations | |
| Abell 1060 | |
The Hydra Cluster (or Abell 1060) is a galaxy cluster that contains 157 bright galaxies, appearing in the constellation Hydra.[4] The cluster spans about ten million light-years and has an unusually high proportion of dark matter.[5] The cluster is part of the Hydra–Centaurus Supercluster located 158 million light-years from Earth. The cluster's largest galaxies are elliptical galaxies NGC 3309 and NGC 3311 and the spiral galaxy NGC 3312 all having a diameter of about 150,000 light-years.[6] In spite of a nearly circular appearance on the sky, there is evidence in the galaxy velocities for a clumpy, three-dimensional distribution.[7]
- ^ a b c d "NASA/IPAC Extragalactic Database". Results for Abell 2151. Retrieved 13 June 2013.
- ^ "National Optical Astronomy Observatory". Galaxies. Archived from the original on 15 March 2016. Retrieved 19 July 2007.
- ^ a b Abell, George O.; Corwin, Harold G. Jr.; Olowin, Ronald P. (May 1989). "A catalog of rich clusters of galaxies" (PDF). Astrophysical Journal Supplement Series. 70 (May 1989): 1–138. Bibcode:1989ApJS...70....1A. doi:10.1086/191333. ISSN 0067-0049. Retrieved 12 March 2012.
- ^ Wehner and Harris, p.1
- ^ Nemiroff, R.; Bonnell, J., eds. (16 April 2001). "The Hydra Cluster of Galaxies". Astronomy Picture of the Day. NASA.
- ^ The Hydra Supercluster An Atlas of the Universe.com
- ^ Fitchett, Michael; Merritt, David (December 1988). "Dynamics of the Hydra I Galaxy Cluster". The Astrophysical Journal. 335: 18–34. Bibcode:1988ApJ...335...18F. doi:10.1086/166902.