BREAKING NEWS
Cloud Server Hosting For Online Businesses
Inexpensive SEO Services
Benefits of Wanting to play Free Online Slot machines
Copeland Septet

Summary

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.[5][6] The group was discovered by British astronomer Ralph Copeland in 1874. The location of Copeland's Septet is right ascension 11h 37m 50s / declination +21° 59′ (2000.0), about three degrees northwest of third magnitude star 93 Leonis.

A group of galaxies nicknamed the Copeland Septet, in the constellation of Leo.[1]
Observation data (Epoch J2000)
Constellation(s)Leo
Right ascension11h 37m 50.5s[2]
Declination+21° 59′ 06″[2]
Brightest memberNGC 3753[3]
Redshift0.0304[4]
Distance132 Mpc (431 Mly) h−1
67.3[3]
Binding mass(6.1±1.0)×1014 h−1
50.00[4] M☉
X-ray luminosity1041.98 erg·s−1[4]
Other designations
HCG 57
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

See also edit

References edit

  1. ^ "Giant Map of the Sky Sets Stage for Ambitious DESI Survey". Retrieved 3 February 2021.
  2. ^ a b Mahdavi, Andisheh; Geller, Margaret J. (2001). "The LX − σ Relation for Galaxies and Clusters of Galaxies". The Astrophysical Journal. 554 (2): L129–L132. arXiv:astro-ph/0105315. Bibcode:2001ApJ...554L.129M. doi:10.1086/321710. S2CID 118106523.
  3. ^ a b Alatalo, K.; et al. (November 2014). "Strong Far-infrared Cooling Lines, Peculiar CO Kinematics, and Possible Star-formation Suppression in Hickson Compact Group 57". The Astrophysical Journal. 795 (2). arXiv:1409.5482. Bibcode:2014ApJ...795..159A. doi:10.1088/0004-637X/795/2/159. 159.
  4. ^ a b c Fukazawa, Yasushi; et al. (August 2002). "Extended Thermal X-Ray Emission from the Spiral-Dominant Group of Galaxies HCG 57". Publications of the Astronomical Society of Japan. 54 (4): 527–532. arXiv:astro-ph/0207011. Bibcode:2002PASJ...54..527F. doi:10.1093/pasj/54.4.527.
  5. ^ "NAME COPELAND SEPTET". Retrieved 12 October 2018.
  6. ^ Bakich, Michael E. (July 10, 2010). 1,001 Celestial Wonders to See Before You Die: The Best Sky Objects for Star Gazers. Springer Science & Business Media. p. 72. ISBN 9781441917775. Retrieved 12 October 2018.