NGC 3754
Galaxy in the constellation Leo
From Wikipedia, the free encyclopedia
NGC 3754 is a small barred spiral galaxy[1] located in the constellation Leo.[2] It is located 447 million light-years away from the Solar System[3] and was discovered on April 5, 1874, by Ralph Copeland.[4]
| NGC 3754 | |
|---|---|
NGC 3754 | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 11h 37m 54.921s |
| Declination | +21d 59m 07.80s |
| Redshift | 0.029952 |
| Heliocentric radial velocity | 8,979 km/s |
| Distance | 447 Mly (137 Mpc) |
| Group or cluster | Copeland Septet |
| Apparent magnitude (V) | 14.3 |
| Characteristics | |
| Type | SBc |
| Size | 58,000 ly |
| Other designations | |
| PGC 36018, CGCG 127-012N, MCG +04-28-011, VV 282b, Copeland Septet NED07, 2MASS J1137549+2159080, SDSS J113754.92+215907.8, HCG 057D, NSA 112842, AGC 210537, NVSS J113754+215910, 2XMM J113755.0+215908, LEDA 36018 | |
The luminosity class of NGC 3754 is II[3] and it is listed as a LINER galaxy by SIMBAD, meaning, a nucleus presenting an emission spectrum characterized by broad lines of weak ionized atoms.[5]
Copeland Septet
NGC 3754 is a member of the Copeland Septet which is made up of 7 galaxies discovered by Copeland in 1874.[6] The other members of the group, are NGC 3745, NGC 3746, NGC 3748, NGC 3750, NGC 3751 and NGC 3753.[7]
Halton Arp noticed the 7 galaxies in an article published in 1966.[8] This group is designated as Arp 320 in which PGC 36010 is part of them.[9]
The 7 galaxies were also observed by Paul Hickson, in which he included them inside his article in 1982.[10] This group is known as Hickson 57, in which NGC 3754 is designated as HCG 57D.[11]