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Hydra Cluster
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
Declination	−12° 05′
Number of galaxies	157
Richness class	1
Bautz–Morgan classification	III
Redshift	0.0548 (16,452 km/s)
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)
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]

References

^ ^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.