NGC 3745
Galaxy in the constellation Leo
From Wikipedia, the free encyclopedia
NGC 3745 is a lenticular galaxy with a bar structure[1] located in the constellation of Leo.[2][3] NGC 3745 is located 471 million light-years away from the Solar System[4] and was discovered by Ralph Copeland on April 5, 1874, but also observed by Hermann Kobold, Lawrence Parsons and John Louis Emil Dreyer.[5]
| NGC 3745 | |
|---|---|
DECam image of NGC 3745 and the members of the Copeland Septet | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 11h 37m 44.434s |
| Declination | +22d 01m 16.64s |
| Redshift | 0.031577 |
| Heliocentric radial velocity | 9,467 km/s |
| Distance | 471 Mly (144.4 Mpc) |
| Group or cluster | Copeland Septet |
| Apparent magnitude (V) | 15.2 |
| Characteristics | |
| Type | SB(s)0, E-S0 |
| Size | 74,500 ly |
| Other designations | |
| PGC 36001, MCG +04-28-004, Copeland Septet NED01, 2MASX J11374443+2201170, SDSS J113744.43+220116.5, HCG 057G, NSA 112840, SSTSL2 J113744.44+220116.6, LEDA 36001 | |
Copeland Septet
NGC 3745 is a member of the Copeland Septet.[6] The other members of the group are NGC 3746, NGC 3748, NGC 3750, NGC 3751, NGC 3753 and NGC 3754.[7]
Halton Arp noticed the group when he published the article in 1966.[8] The group is designated as Arp 320 in which another galaxy PGC 36010, is part of it.[9]
This group was 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 3745 is designated as HCG 57G.[11]