Copeland Septet Explained

Brightest Member:NGC 3753
Redshift:0.0304
Distance:132Mpc
Other Names:HCG 57

The Copeland Septet (also Copeland's Septet, Hickson Compact Group 57) is a group of galaxies in the constellation Leo that includes NGC 3748, NGC 3754, NGC 3750, NGC 3751, NGC 3745, NGC 3753 and NGC 3746.[1] [2] The group was discovered by British astronomer Ralph Copeland in 1874. The location of Copeland's Septet is right ascension / declination (2000.0), about three degrees northwest of third magnitude star 93 Leonis.

The redshift of the brightest member, NGC 3753 places Copelands Septet as a part of the Coma Supercluster.[3]

See also

Notes and References

  1. Web site: NAME COPELAND SEPTET . 12 October 2018.
  2. Book: Bakich . Michael E. . 1,001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers . July 10, 2010 . . 9781441917775 . 72 . 12 October 2018.
  3. Jaffe . W. . Gavazzi . G. . 1986-02-01 . Radio continuum survey of the coma/A1367 supercluster. II. 1.5 GHz observations of 396 CGCG galaxies. . The Astronomical Journal . 91 . 204–216 . 10.1086/114001 . 0004-6256.