NGC 3754 | |
---|---|
Observation data | |
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 |
NGC 3754 is a small barred spiral galaxy [1] located in 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]
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]
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]