Arp 273
Pair of interacting galaxies in the constellation Andromeda
From Wikipedia, the free encyclopedia
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.[5] The larger of the spiral galaxies, known as UGC 1810, is about five times more massive than the smaller galaxy.[6] 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,[7] and "it is thought that the smaller galaxy has actually passed through the larger one."[8]
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| Arp 273 | |
|---|---|
| |
| Observation data (J2000 epoch) | |
| Constellation | Andromeda |
| Right ascension | 02h 21m 28.703s[1] |
| Declination | +39° 22′ 32.65″[1] |
| Distance | 300 million ly |
| Apparent magnitude (V) | 13.7[2] |
| Characteristics | |
| Type | SA(s)b pec[3] + SB(s)a pec[4] |
| Other designations | |
| Z 523-28, Z 0218.4+3909, CGPG 0218.4+3909, ZW V 223, KPG 64a, UZC J022128.6+392231, 2MASX J02212870+3922326, Arp 273, UGC 1810, MCG +06-06-023, PGC 8961, VV 323, VV 323a[1] | |
One supernova has been observed in UGC 1810: SN 1962R (type unknown, mag. 15.9) was discovered on plates taken at the Lick Observatory in December 1962, and presumed to be of Type II.[9][10][11]
