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Galaxy in the constellation Leo From Wikipedia, the free encyclopedia
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]
| NGC 3748 | |
|---|---|
NGC 3748 is located on the top right of the image above NGC 3745 and NGC 3746 which was taken by Mount Lemmon Observatory | |
| Observation data (J2000 epoch) | |
| Constellation | Leo |
| Right ascension | 11h 37m 49.065s |
| Declination | +22d 01m 34.14s |
| Redshift | 0.029407 |
| Heliocentric radial velocity | 8,816 km/s |
| Distance | 440 Mly (135 Mpc) |
| Group or cluster | Copeland Septet |
| Apparent magnitude (V) | 14.8 |
| Characteristics | |
| Type | SB0?, S0, RET |
| Size | 148,000 ly |
| Other designations | |
| 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 | |
Like NGC 3746, NGC 3748 also has a recessed core (RET).[4] 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]
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