NGC 6181 | |
---|---|
Observation data (J2000 epoch) | |
Constellation | Hercules |
Right ascension | 16h 32m 20.9s |
Declination | +19° 49′ 36″ |
Redshift | 0.007922±0.000013 |
Heliocentric radial velocity | 2375±4 km/s |
Galactocentric velocity | 2493±6 km/s |
Apparent magnitude (V) | 10.42 |
Absolute magnitude (V) | -22.14 |
Characteristics | |
Type | SB(rs)c |
Size | ~ 79,000 light years |
Apparent size (V) | 2.50′ × 1.1′ |
Other designations | |
UGC 10439, MCG 3-42-20, ZWG 109.31, PGC 58470, IRAS 16301+1955 | |
References: NASA/IPAC extragalactic datatbase, http://spider.seds.org/, http://cseligman.com |
NGC 6181 is a barred spiral galaxy located in the constellation Hercules. It is designated as SB(rs)c in the galaxy morphological classification scheme and was discovered by William Herschel on 28 April 1788. The galaxy is 107 million light years away. [1] [2] [3]
Three supernovae have been observed in NGC 6181: SN 1926B (type unknown, mag. 14.8), [4] [5] SN 1951I (type unknown, mag. 15.7), [6] and SN 2019aai (type II, mag. 17.84). [7]
NGC 3184, the Little Pinwheel Galaxy, is a spiral galaxy approximately 40 million light-years away in the constellation Ursa Major. Its name comes from its resemblance to the Pinwheel Galaxy. It was discovered on 18 March 1787 by German-British astronomer William Herschel. It has two HII regions named NGC 3180 and NGC 3181.
NGC 6745 is an irregular galaxy about 206 million light-years away in the constellation Lyra. It was discovered by French astronomer Édouard Stephan on 24 July 1879.
NGC 1532, also known as Haley's Coronet, is an edge-on barred spiral galaxy located approximately 50 million light-years from the Solar System in the constellation Eridanus. The galaxy was discovered by James Dunlop on 29 October 1826.
NGC 772 is an unbarred spiral galaxy approximately 106 million light-years away in the constellation Aries. It was discovered on 29 November 1785 by German-British astronomer William Herschel.
NGC 4567 and NGC 4568 are a set of unbarred spiral galaxies about 60 million light-years away in the constellation Virgo. They were both discovered by William Herschel in 1784. They are part of the Virgo Cluster of galaxies.
NGC 2535 is an unbarred spiral galaxy in the constellation Cancer. It was discovered on 22 January 1877 by French astronomer Édouard Stephan.
NGC 5161 is a spiral galaxy in the constellation Centaurus. John Herschel discovered it on 3 June 1836.
NGC 383 is a double radio galaxy with a quasar-like appearance located in the constellation Pisces. It is listed in Halton C. Arp's 1966 "The Arp Atlas of Peculiar Galaxies." Recent discoveries by the National Radio Astronomy Observatory in 2006 reveal that NGC 383 is being bisected by high energy relativistic jets traveling at relatively high fractions of the speed of light. The relativistic electrons in the jets are detected as synchrotron radiation in the x-ray and radio wavelengths. The focus of this intense energy is the galactic center of NGC 383. The relativistic electron jets detected as synchrotron radiation extend for several thousand parsecs and then appear to dissipate at the ends in the form of streamers or filaments.
Arp 271 is a pair of similarly sized interacting spiral galaxies, NGC 5426 and NGC 5427, in the constellation of Virgo. It is not certain whether the galaxies are going to eventually collide or not. They will continue interacting for tens of millions of years, creating new stars as a result of the mutual gravitational attraction between the galaxies, a pull seen in the bridge of stars already connecting the two. Located about 130 million light-years away, the Arp 271 pair is about 130,000 light-years across. It was originally discovered in 1785 by William Herschel. It is speculated, that the Milky Way will undergo a similar collision in about five billion years with the neighbouring Andromeda Galaxy, which is currently located about 2.6 million light-years away.
NGC 4527 is a spiral galaxy in the constellation Virgo. It is a member of the M61 Group of galaxies, which is a member of the Virgo II Groups, a series of galaxies and galaxy clusters strung out from the southern edge of the Virgo Supercluster.
NGC 6560 is a spiral galaxy located in the constellation Hercules. It was discovered by Lewis A. Swift on 22 October 1886.
NGC 6104 is a barred spiral galaxy located in the constellation Corona Borealis. It is designated as S(R)Pec in the galaxy morphological classification scheme, though it is clearly a barred spiral, and was discovered by William Herschel on 16 May 1787. The galaxy is approximately 388 million light-years away.
NGC 6221 is a barred spiral galaxy located in the constellation Ara. In de Vaucouleurs' galaxy morphological classification scheme, it is classified as SB(s)bc and was discovered by British astronomer John Herschel on 3 May 1835. NGC 6221 is located at about 69 million light years from Earth.
NGC 908 is an unbarred spiral galaxy in the constellation Cetus. It was discovered on 20 September 1786 by William Herschel. This galaxy is 56 million light years away from Earth. It is the main galaxy in the NGC 908 group, which also includes NGC 899, NGC 907, and IC 223.
NGC 1448 or NGC 1457 is an unbarred spiral galaxy seen nearly edge-on in the constellation Horologium. It is at a distance of 55 million light years from Earth. It was discovered by John Herschel in 1835.
NGC 317 is a pair of interacting galaxies, consisting of a lenticular galaxy NGC 317A and a spiral galaxy NGC 317B, in the constellation Andromeda. It was discovered on October 1, 1885 by Lewis Swift.
NGC 3464 is a barred spiral galaxy in the constellation of Hydra, discovered 14 January 1886 by Ormond Stone.
NGC 7038 is an intermediate spiral galaxy located about 210 million light-years away in the constellation of Indus. Astronomer John Herschel discovered NGC 7038 on September 30, 1834.
NGC 7053 is a spiral galaxy located about 200 million light-years away in the constellation of Pegasus. It was discovered by astronomer Albert Marth on September 2, 1863. It was then rediscovered by astronomer Heinrich d'Arrest on October 8, 1865.
NGC 7083 is an unbarred spiral galaxy located about 134 million light-years away in the constellation of Indus. It is also classified as a flocculent spiral galaxy. NGC 7083 was discovered by astronomer James Dunlop on August 28, 1826.