Copeland Septet

Last updated
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 memberNGC 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
See also: Galaxy group, Galaxy cluster, List of galaxy groups and clusters

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.

See also

Related Research Articles

<i>New General Catalogue</i> Astronomical catalogue of deep sky objects

The New General Catalogue of Nebulae and Clusters of Stars is an astronomical catalogue of deep-sky objects compiled by John Louis Emil Dreyer in 1888. The NGC contains 7,840 objects, including galaxies, star clusters and emission nebulae. Dreyer published two supplements to the NGC in 1895 and 1908, known as the Index Catalogues, describing a further 5,386 astronomical objects. Thousands of these objects are best known by their NGC or IC numbers, which remain in widespread use.

<span class="mw-page-title-main">Seyfert's Sextet</span> Group of galaxies in the constellation Serpens

Seyfert's Sextet is a group of galaxies about 190 million light-years away in the constellation Serpens. The group appears to contain six members, but one of the galaxies, NGC 6027d, is a background object and another "galaxy," NGC 6027e, is actually a part of the tail from galaxy NGC 6027. The gravitational interaction among these galaxies should continue for hundreds of millions of years. Ultimately, the galaxies will merge to form a single giant elliptical galaxy.

<span class="mw-page-title-main">Stephan's Quintet</span> Visual grouping of five galaxies

Stephan's Quintet is a visual grouping of five galaxies of which four form the first compact galaxy group ever discovered. The group, visible in the constellation Pegasus, was discovered by Édouard Stephan in 1877 at the Marseille Observatory. The group is the most studied of all the compact galaxy groups. The brightest member of the visual grouping is NGC 7320, which has extensive H II regions, identified as red blobs, where active star formation is occurring.

<span class="mw-page-title-main">NGC 3628</span> Spiral galaxy in the constellation Leo

NGC 3628, also known as the Hamburger Galaxy or Sarah's Galaxy, is an unbarred spiral galaxy about 35 million light-years away in the constellation Leo. It was discovered by William Herschel in 1784. It has an approximately 300,000 light-years long tidal tail. Along with M65 and M66, NGC 3628 forms the Leo Triplet, a small group of galaxies. Its most conspicuous feature is the broad and obscuring band of dust located along the outer edge of its spiral arms, effectively transecting the galaxy to the view from Earth.

<span class="mw-page-title-main">Messier 66</span> Intermediate spiral galaxy in the constellation Leo

Messier 66 or M66, also known as NGC 3627, is an intermediate spiral galaxy in the southern, equatorial half of Leo. It was discovered by French astronomer Charles Messier on 1 March 1780, who described it as "very long and very faint". This galaxy is a member of a small group of galaxies that includes M65 and NGC 3628, known as the Leo Triplet or the M66 Group. M65 and M66 are a common object for amateur astronomic observation, being separated by only 20′.

<span class="mw-page-title-main">Messier 110</span> Satellite galaxy of the Andromeda Galaxy

Messier 110, or M110, also known as NGC 205, is a dwarf elliptical galaxy that is a satellite of the Andromeda Galaxy in the Local Group.

<span class="mw-page-title-main">NGC 7320</span> Spiral Galaxy in the constellation Pegasus

NGC 7320 is a spiral galaxy in Stephan's Quintet. However, it is not an actual member of the galaxy group, but a much closer line-of-sight galaxy at a distance of about 40 million light years, the same as the nearby NGC 7331. Other galaxies of Stephan's Quintet are some 300 million light-years distant.

<span class="mw-page-title-main">Robert's Quartet</span> Compact galaxy group in the constellation of Phoenix

Robert's Quartet is a compact galaxy group approximately 160 million light-years away in the constellation Phoenix. It is a family of four very different galaxies whose proximity to each other has caused the creation of about 200 star-forming regions and pulled out a stream of gas and dust 100,000 light years long. Its members are NGC 87, NGC 88, NGC 89 and NGC 92, discovered by John Herschel on the 30 September 1834.

<span class="mw-page-title-main">NGC 7318</span> Pair of interacting galaxies in the constellation Pegasus

NGC 7318 is a pair of colliding galaxies about 280 million light-years from Earth. They appear in the Constellation Pegasus and are members of Stephan's Quintet.

<span class="mw-page-title-main">NGC 3593</span> Lenticular galaxy in the constellation Leo

NGC 3593 is a lenticular galaxy located in the constellation Leo. It has a morphological classification of SA(s)0/a, which indicates it is a lenticular galaxy of the pure spiral type. Despite this, it has a large amount of hydrogen, both in its molecular and atomic (H) form. It is a starburst galaxy, which means it is forming new stars at a high rate. This is occurring in a band of gas surrounding the central nucleus. There is a single arm, which spirals outward from this ring. It is frequently but not consistently identified as a member of the Leo Triplet group.

<span class="mw-page-title-main">NGC 7319</span> Highly distorted spiral galaxy in the constellation Pegasus

NGC 7319 is a highly distorted barred spiral galaxy that is a member of the compact Stephan's Quintet group located in the constellation Pegasus, some 311 megalight-years distant from the Milky Way. The galaxy's arms, dust and gas have been highly disturbed as a result of the interaction with the other members of the Quintet. Nearly all of the neutral hydrogen has been stripped from this galaxy, most likely as a result of a collision with NGC 7320c some 100 million years ago. A pair of long, parallel tidal tails extend southward from NGC 7319 in the direction of NGC 7320c, and is undergoing star formation.

<span class="mw-page-title-main">NGC 7317</span> Elliptical galaxy in the constellation Pegasus

NGC 7317 is an elliptical galaxy that is a member of Stephan's Quintet in the constellation Pegasus. The James Webb Space Telescope photographed it as part of Stephan's Quintet; the image was released on 12 July 2022.

<span class="mw-page-title-main">NGC 7331 Group</span> Visual grouping of galaxies in the constellation Pegasus

NGC 7331 Group is a visual grouping of galaxies in the constellation Pegasus. Spiral galaxy NGC 7331 is a foreground galaxy in the same field as the collection, which is also called the Deer Lick Group. It contains four other members, affectionately referred to as the "fleas": the lenticular or unbarred spirals NGC 7335 and NGC 7336, the barred spiral galaxy NGC 7337 and the elliptical galaxy NGC 7340. These galaxies lie at distances of approximately 332, 365, 348 and 294 million light years, respectively. Although adjacent on the sky, this collection is not a galaxy group, as NGC 7331 itself is not gravitationally associated with the far more distant "fleas"; indeed, even they are separated by far more than the normal distances of a galaxy group.

<span class="mw-page-title-main">NGC 5614</span> Unbarred spiral galaxy in the constellation Boötes

NGC 5614 is an unbarred spiral galaxy in the constellation Boötes. It is the primary member of the Arp 178 triplet of interacting galaxies with NGC 5613 and NGC 5615.

<span class="mw-page-title-main">NGC 6845</span> Four interacting galaxies in the constellation Telescopium

NGC 6845 is an interacting system of four galaxies in the constellation Telescopium. The cluster has certain similarities with Stephan's Quintet. Its distance is estimated to be about 90 Mpc.

<span class="mw-page-title-main">NGC 70</span> Spiral galaxy in the constellation Andromeda

NGC 70 is a spiral galaxy located in the constellation Andromeda. It was discovered on October 7, 1855 by R. J. Mitchell and was also observed on December 19, 1897 by Guillaume Bigourdan from France who described it as "extremely faint, very small, round, between 2 faint stars"

<span class="mw-page-title-main">NGC 85</span> Lenticular galaxy in the constellation Andromeda

NGC 85 is an interacting spiral or lenticular galaxy estimated to be about 200 million light-years away in the constellation of Andromeda. It was discovered by Ralph Copeland in 1873 and its apparent magnitude is 15.7. The galaxy appears to be interacting with the companion spiral IC 1546.

<span class="mw-page-title-main">Wild's Triplet</span> Galaxy group of three small interacting galaxies

Wild's Triplet is a group of three small, interacting spiral galaxies. The galaxies are visible in the constellation Virgo. The triplet has luminous connecting bridges and is located some 200 million light-years away. The aforementioned bridges are probably formed as a result of gravitational tidal interactions among the galaxies. The triplet is named after the British-born and Australia-based astronomer Paul Wild (1923–2008), who studied the trio in the early 1950s.

<span class="mw-page-title-main">Zwicky's Triplet</span> Minor galaxy cluster in the constellation Hercules

Zwicky's Triplet is a group of three galaxies visible in the constellation Hercules.

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.


This page is based on this Wikipedia article
Text is available under the CC BY-SA 4.0 license; additional terms may apply.
Images, videos and audio are available under their respective licenses.