| NGC 3748 | |
| Constellation Name: | Leo |
| Ra: | 11h 37m 49.065s |
| Dec: | +22d 01m 34.14s |
| Z: | 0.029407 |
| H Radial V: | 8,816 km/s |
| Dist Ly: | 440 Mly (135 Mpc) |
| Group Cluster: | Copeland Septet |
| Appmag V: | 14.8 |
| Type: | SB0?, S0, RET |
| Size: | 148,000 ly |
| Names: | PGC 36007, CGCG 127-007, MCG +04-28-007, Copeland Septet NED03, 2MASX J11374903+2201340, NSA 139941, HCG 057E, SDSS J113749.06+2201134.1, WBL 343-002, UZC J113749.1+220134, SSTSL2 J113749.06+220134.2, 2XMM J113749.0+220133, LEDA 36007 |
| Epoch: | J2000 |
NGC 3748 is a lenticular galaxy with a bar[1] located in the Leo constellation.[2] [3] It is located 440 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] Like NGC 3746, NGC 3748 also has a recessed core (RET). It is described as, "moderately bright, fairly small, slightly elongated NW-SE, 0.4'x0.3' with a small bright core".[6]
NGC 3748 is a member of the Copeland Septet which is made up of 7 galaxies which were discovered by Copeland in 1874.[7] The other members are NGC 3745, NGC 3746, NGC 3750, NGC 3751, NGC 3753 and NGC 3754.[8]
Halton Arp noticed the galaxies in this group in an article that was published in 1966.[9] This group is known as Arp 320 along with another galaxy, PGC 36010.[10]
This group was observed by Paul Hickson whom he included in his article in 1982.[11] The group is known as Hickson 57, in which NGC 3748 is designated as HCG 57E.[12]