NGC 3733
Galaxy in the constellation Ursa Major
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NGC 3733 is an intermediate spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 1,358±12 km/s, which corresponds to a Hubble distance of 65.3 ± 4.6 Mly (20.03 ± 1.41 Mpc).[1] Additionally, nine non-redshift measurements give a farther mean distance of 73.66 ± 6.46 Mly (22.583 ± 1.981 Mpc).[2] It was discovered by German-British astronomer William Herschel on 14 April 1789.[3][4]
| NGC 3733 | |
|---|---|
NGC 3733 imaged by SDSS. The glare below comes from the nearby star HD 100615. | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 35m 01.6481s[1] |
| Declination | +54° 51′ 02.122″[1] |
| Redshift | 0.003949±0.00000200[1] |
| Heliocentric radial velocity | 1,184±1 km/s[1] |
| Distance | 73.66 ± 6.46 Mly (22.583 ± 1.981 Mpc)[1] |
| Group or cluster | NGC 3898 group (LGG 250) |
| Apparent magnitude (V) | 12.93[1] |
| Characteristics | |
| Type | SAB(s)cd[1] |
| Size | ~107,100 ly (32.85 kpc) (estimated)[1] |
| Apparent size (V) | 4.8′ × 2.2′[1] |
| Other designations | |
| IRAS F11322+5507, 2MASX J11350158+5451018, UGC 6554, MCG +09-19-123, PGC 35797, CGCG 268-055, VV 459[1] | |
NGC 3733 has a possible active galactic nucleus, i.e. it has a compact region at the center of a galaxy that emits a significant amount of energy across the electromagnetic spectrum, with characteristics indicating that this luminosity is not produced by the stars.[5][6]
