| NGC 3745 | |
|---|---|
 DECam image of NGC 3745 and the members of the Copeland Septet | |
| Observation data (J2000epoch) | |
| Constellation | Leo |
| Right ascension | 11h 37m 44.434s |
| Declination | +22d 01m 16.64s |
| Redshift | 0.031577 |
| Heliocentric radial velocity | 9,467 km/s |
| Distance | 471Mly (144.4Mpc) |
| Group orcluster | 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 | |
NGC 3745 is alenticular galaxy with a bar structure[1] located in the constellation ofLeo.[2][3] NGC 3745 is located 471 millionlight-years away from theSolar System[4] and was discovered byRalph Copeland on April 5, 1874, but also observed byHermann Kobold,Lawrence Parsons andJohn Louis Emil Dreyer.[5]
NGC 3745 is a member of theCopeland Septet.[6] The other members of the group areNGC 3746,NGC 3748,NGC 3750,NGC 3751,NGC 3753 andNGC 3754.[7]
Halton Arp noticed the group when he published the article in 1966.[8] The group is designated asArp 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 asHickson 57, in which NGC 3745 is designated as HCG 57G.[11]