Arp 87

Last updated
NGC 3808A
Arp87full.jpg
A visible light image of NGC 3808A (right) and 3808B (left).
Credit: NASA/HST.
Observation data (J2000 epoch)
Constellation Leo
Right ascension 11h 40m 44.4s [1]
Declination +22° 26′ 16″ [1]
Redshift 0.023726 [1]
Helio radial velocity 7113 km/s [1]
Apparent magnitude  (V)14.1 [1]
Characteristics
Type NGC 3808A: SAB(rs)c? pec [2]
I0? pec [3]
Apparent size  (V)2.5′ × 0.8′ [1]
Other designations
NGC 3808, UGC 6643 [1]
NGC 3808A: MCG+04-28-021, PGC 36227 [2]
NGC 3808B: MCG+04-28-020, PGC 36228 [3]

Arp 87 (also known as NGC 3808) is a pair of two interacting galaxies, NGC 3808A and NGC 3808B. They are situated in the Leo constellation. NGC 3808A, the brighter, is a peculiar spiral galaxy, [2] while NGC 3808B is an irregular galaxy. [3]

Contents

The two galaxies were discovered on 10 April 1785 by William Herschel. The two are located about 330 million light-years (100 megaparsecs) away from the Earth. [4] Arp 87 was observed by the Hubble Telescope in 2007, which revealed massive clouds of gas and dust flowing from one galaxy to another. Additionally, both galaxies appear to have been distorted. [5]

See also

Related Research Articles

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The Atlas of Peculiar Galaxies is a catalog of peculiar galaxies produced by Halton Arp in 1966. A total of 338 galaxies are presented in the atlas, which was originally published in 1966 by the California Institute of Technology. The primary goal of the catalog was to present photographs of examples of the different kinds of peculiar structures found among galaxies.

NGC 9 Spiral galaxy in the constellation Pegasus

NGC 9 is a spiral galaxy about 140 million light years away in the Pegasus constellation. It was discovered on 27 September 1865 by Otto Wilhelm von Struve.

NGC 14 irregular galaxy in the constellation Pegasus

NGC 14 is an irregular galaxy in the Pegasus constellation. It was included in Halton Arp's Atlas of Peculiar Galaxies, under the section "Galaxies with the appearance of fission," since the irregular appearance of this galaxy causes it to look like it is separating apart. It was discovered on September the 18th 1786 by William Herschel.

Arp 273 Pair of interacting galaxies

Arp 273 is a pair of interacting galaxies, 300 million light years away in the constellation Andromeda. It was first described in the Atlas of Peculiar Galaxies, compiled by Halton Arp in 1966. The larger of the spiral galaxies, known as UGC 1810, is about five times more massive than the smaller galaxy. It has a disc that is tidally distorted into a rose-like shape by the gravitational pull of the companion galaxy below it, known as UGC 1813. The smaller galaxy shows distinct signs of active star formation at its nucleus, and "it is thought that the smaller galaxy has actually passed through the larger one."

NGC 6248 is a barred spiral galaxy in the constellation Draco. It was discovered on August 11, 1885 by the American astronomer Lewis A. Swift. The galaxy is located approximately 52 million light years away from earth with an approximate diameter of 47,000 light-years.

NGC 150 Barred spiral galaxy in the constellation of Sculptor

NGC 150 is a barred spiral galaxy in the constellation Sculptor. It is about 70 million light years away from the solar system, and it has a diameter of about 55,000 light years. It was discovered on 20 November 1886, by Lewis A. Swift. The Type II supernova SN 1990K was detected in NGC 150, and was reported to be similar to SN 1987A.

NGC 156 Double star in the constellation Cetus

NGC 156 is a double star located in the Cetus constellation. It was discovered on 1882 by Ernst Wilhelm Leberecht Tempel.

NGC 7028 is the designation of a celestial object in the constellation of Delphinus. The object was supposedly discovered by the German astronomer Albert Marth on 17 September 1863. However, its identification is uncertain, and the object is considered lost. No galaxies or nebulous objects are at the coordinates that he gave.

NGC 4647 Galaxy in the constellation Virgo

NGC 4647 is an intermediate spiral galaxy estimated to be around 63 million light-years away in the constellation of Virgo. It was discovered by astronomer William Herschel on March 15, 1784. NGC 4647 is listed along with Messier 60 as being part of a pair of galaxies called Arp 116; their designation in Halton Arp's Atlas of Peculiar Galaxies. The galaxy is located on the outskirts of the Virgo Cluster.

Arp 256 Interacting galaxy in the constellation Cetus

Arp 256 is a pair of interacting spiral galaxies located in the constellation of Cetus. Arp 256 refers to the southern galaxy; the northern galaxy is Arp 256N.

NGC 5575 Galaxy in the constellation Virgo

NGC 5575 is a lenticular galaxy in the constellation Virgo. The object was discovered on May 8, 1864 by the German astronomer Albert Marth.

NGC 5030 is a barred spiral galaxy in the constellation Virgo. The object was discovered on 17 March 1881 by the American astronomer Edward Singleton Holden.

NGC 1683 Spiral galaxy in Orion

NGC 1683 is a spiral galaxy in the constellation Orion. The object was discovered in 1850 by the Irish astronomer William Parsons.

NGC 4918 is a spiral galaxy in the constellation Virgo. The object was discovered in 1886 by the American astronomer Francis Preserved Leavenworth.

NGC 6975 Galaxy in the constellation Aquarius

NGC 6975, also known as NGC 6976, is a spiral galaxy in the constellation Aquarius. The object was discovered on 12 July 1864 by the German astronomer Albert Marth.

NGC 3402 Elliptical galaxy in the constellation Hydra

NGC 3402, also known as NGC 3411, is an elliptical galaxy in the constellation Hydra. The object was discovered on March 25, 1786 by German-British astronomer William Herschel. NGC 3402 is the largest galaxy in the eponymous NGC 3402 cluster.

NGC 7041B is a spiral or lenticular galaxy in the constellation Indus. The object was discovered on 7 July 1834 by the British astronomer John Herschel.

NGC 191A A lenticular galaxy in the constellation Cetus

NGC 191A is a lenticular galaxy in the constellation Cetus.

NGC 2936 Spiral galaxy in the constellation Hydra

NGC 2936 is an interacting spiral galaxy located at a distance of 326 million light years, in the constellation Hydra. NGC 2936 is interacting with elliptical galaxy NGC 2937, located just beneath it. They were both discovered by Albert Marth on Mar 3, 1864. To some astronomers, the galaxy looks like a penguin or a porpoise. NGC 2936, NGC 2937, and PGC 1237172 are included in the Atlas of Peculiar Galaxies as Arp 142 in the category "Galaxy triplet".

NGC 528 Galaxy in constellation Andromeda

NGC 528 is a lenticular galaxy located in the constellation Andromeda. It is located an estimated 70 million parsecs from the Milky Way. The object was discovered on 22 August 1865 by the German-Danish astronomer Heinrich Ludwig d'Arrest.

References

  1. 1 2 3 4 5 6 7 "NED results for object ARP 187". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing and Analysis Center . Retrieved 21 April 2018.
  2. 1 2 3 "NED results for object NGC 3808A". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing and Analysis Center . Retrieved 21 April 2018.
  3. 1 2 3 "NED results for object NGC 3808B". NASA/IPAC Extragalactic Database. National Aeronautics and Space Administration / Infrared Processing and Analysis Center . Retrieved 21 April 2018.
  4. ↑ Seligman, Courtney. "New General Catalogue objects: NGC 3800 - 3849". cseligman.com. Retrieved 21 March 2018.
  5. ↑ "Arp 87 | ESA/Hubble". www.spacetelescope.org. 2007. Retrieved 21 March 2018.

Coordinates: Jupiter and moon.png 11h 40m 44.2s, +22° 25′ 46″


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