Hydra Cluster

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]

Hydra Cluster
A map of Hydra cluster
Observation data (Epoch J2000)
Right ascension09h 18.0m [1]
Declination−12° 05′[1]
Number of galaxies157[2]
Richness class1[3]
Bautz–Morgan classificationIII[3]
Redshift0.0548 (16,452 km/s)[1]
58.3 Mpc (190.1 Mly) h−1
X-ray flux6.1×1011 erg s−1 cm−2 (0.5–2 keV)[1]
Other designations
Abell 1060
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters


  1. ^ a b c d "NASA/IPAC Extragalactic Database". Results for Abell 2151. Retrieved 13 June 2013.
  2. ^ "National Optical Astronomy Observatory". Galaxies. Retrieved 19 July 2007.
  3. ^ 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.
  4. ^ Wehner and Harris, p.1
  5. ^ Nemiroff, R.; Bonnell, J., eds. (16 April 2001). "The Hydra Cluster of Galaxies". Astronomy Picture of the Day. NASA.
  6. ^ The Hydra Supercluster An Atlas of the Universe.com
  7. ^ 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.

Related readingEdit

Coordinates:   10h 36.9m 00s, −27° 32′ 00″