Copeland Septet

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Copeland Septet group of galaxies.jpg
A group of galaxies nicknamed the Copeland Septet, in the constellation of Leo. [1]
Observation data (Epoch J2000)
Constellation(s) Leo
Right ascension 11h 37m 50.5s [2]
Declination +21° 59′ 06″ [2]
Brightest member NGC 3753 [3]
Redshift 0.0304 [4]
Distance 132  Mpc (431  Mly) h−1
67.3 [3]
Binding mass (6.1±1.0)×1014h−1
50.00 [4]   M☉
X-ray luminosity 1041.98 erg·s−1 [4]
Other designations
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. [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.

The redshift of the brightest member, NGC 3753 places Copelands Septet as a part of the Coma Supercluster. [7]

See also

Related Research Articles

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<span class="mw-page-title-main">Galaxy group</span> Aggregation of galaxies with 50 or fewer members

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<span class="mw-page-title-main">NGC 4203</span> Galaxy in the constellation Coma Berenices

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<span class="mw-page-title-main">Coma I</span> Galaxy cluster in constellation Coma Berenices

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<span class="mw-page-title-main">NGC 536</span> Galaxy in the constellation Andromeda

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<span class="mw-page-title-main">NGC 4060</span> Lenticular and LINER galaxy in the constellation Coma Berenices

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<span class="mw-page-title-main">NGC 4061</span> Galaxy in the constellation Coma Berenices

NGC 4061 is an elliptical galaxy located 310 light-years away in the constellation Coma Berenices. It was discovered by astronomer William Herschel on April 27, 1785. It was rediscovered by John Herschel on April 29, 1832. It is listed both as NGC 4061 and NGC 4055. NGC 4061 is a member of the NGC 4065 Group and forms an interacting pair with its companion, NGC 4065 as evidenced by distortions in their optical isophotes.

<span class="mw-page-title-main">NGC 4065</span> Galaxy in the constellation Coma Berenices

NGC 4065 is an elliptical galaxy located 300 million light-years away in the constellation Coma Berenices. The galaxy was discovered by astronomer William Herschel on April 27, 1785. It was then rediscovered by John Herschel on April 29, 1832 and was listed as NGC 4057. NGC 4065 is the brightest member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4066</span> Galaxy in the constellation Coma Berenices

NGC 4066 is an elliptical galaxy located 340 million light-years away in the constellation Coma Berenices. The galaxy was discovered by astronomer William Herschel on April 27, 1785. NGC 4066 is a member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4070</span> Galaxy in the constellation Coma Berenices

NGC 4070 is an elliptical galaxy located 340 million light-years away in the constellation Coma Berenices. NGC 4070 was discovered by astronomer William Herschel on April 27, 1785. It was rediscovered by John Herschel on April 29, 1832 and was listed as NGC 4059. The galaxy is a member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4072</span> Galaxy in the constellation Coma Berenices

NGC 4072 is a lenticular galaxy located 300 million light-years away in the constellation Coma Berenices. The galaxy was discovered by astronomer Ralph Copeland on April 3, 1872 and is a member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4076</span> Galaxy in the constellation Coma Berenices

NGC 4076 is a spiral galaxy located 290 million light-years away in the constellation Coma Berenices. The galaxy was discovered by astronomer William Herschel on April 27, 1785 and is a member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4086</span> Galaxy in the constellation Coma Berenices

NGC 4086 is a lenticular galaxy located 330 million light-years away in the constellation Coma Berenices. NGC 4086 was discovered by astronomer Heinrich d'Arrest on May 2, 1864 and is a member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4090</span> Galaxy in the constellation Coma Berenices

NGC 4090 is a spiral galaxy located 340 million light-years away in the constellation Coma Berenices. The galaxy was discovered by astronomer Heinrich d'Arrest on May 2, 1864 and is a member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4092</span> Galaxy in the constellation Coma Berenices

NGC 4092 is a spiral galaxy located 310 million light-years away in the constellation Coma Berenices. It was discovered by astronomer Heinrich d'Arrest on May 2, 1864. NGC 4092 is a member of the NGC 4065 Group and hosts an AGN.

<span class="mw-page-title-main">NGC 4093</span> Galaxy in the constellation Coma Berenices

NGC 4093 is an elliptical galaxy located 340 million light-years away in the constellation Coma Berenices. The galaxy was discovered by astronomer Heinrich d'Arrest on May 4, 1864. NGC 4093 is a member of the NGC 4065 Group and is a radio galaxy with a two sided jet.

<span class="mw-page-title-main">NGC 4098</span> Interacting galaxies in the constellation Coma Berenices

NGC 4098 is an interacting pair of spiral galaxies located 330 million light-years away in the constellation Coma Berenices. NGC 4098 was discovered by astronomer William Herschel on April 26, 1785. It was then rediscovered by Hershel on December 27, 1786 was listed as NGC 4099. NGC 4098 is a member of the NGC 4065 Group.

<span class="mw-page-title-main">NGC 4065 Group</span> Group of galaxies in the constellation of Coma Berenices

The NGC 4065 Group is a group of galaxies located about 330 Mly (100 Mpc) in the constellation Coma Berenices. The group's brightest member is NGC 4065 and located in the Coma Supercluster.

<span class="mw-page-title-main">NGC 3753</span> Galaxy in the constellation Leo

NGC 3753 is a large spiral galaxy with a bar located in the Leo constellation. It is located 435 million light-years away from the Solar System and was discovered on February 9, 1874, by Ralph Copeland.

References

  1. ↑ "Giant Map of the Sky Sets Stage for Ambitious DESI Survey" . Retrieved 3 February 2021.
  2. 1 2 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. 1 2 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. 1 2 3 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.
  7. ↑ 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. doi:10.1086/114001. ISSN   0004-6256.
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