NGC 3220
Spiral galaxy
From Wikipedia, the free encyclopedia
NGC 3220 is a spiral galaxy located in the constellation Ursa Major. It was discovered by the German-born British astronomer William Herschel on 8 April 1793.[3]
| NGC 3220 | |
|---|---|
The spiral galaxy NGC 3220. | |
| Observation data | |
| Constellation | Ursa Major |
| Right ascension | 10h 23m 44.6s[1] |
| Declination | +57° 01′ 37″[1] |
| Redshift | 0.003875 ± 0.000006[1] |
| Heliocentric radial velocity | 1162 ± 2 km/s[1] |
| Distance | 63.5 ± 4.5 Mly (19.47 ± 1.37 Mpc)[1] |
| Group or cluster | NGC 3264 group |
| Apparent magnitude (V) | 13.1[2] |
| Apparent magnitude (B) | 13.9[2] |
| Surface brightness | 12.63[2] |
| Characteristics | |
| Type | SB(s)cd?[1][2] Sd[3] |
| Apparent size (V) | 1.3′ × 0.5′[2] |
| Other designations | |
| IC 604, UGC 5614, MCG 10-15-73, PGC 30462, CGCG 390-34 | |
The galaxy was also observed by the American astronomer Lewis Swift on 8 August 1890 and was subsequently listed in the Index Catalogue as IC 604.[3]
Characteristics
Its velocity relative to the cosmic microwave background is 1320±11 km/s, corresponding to a Hubble distance of 63.6 ± 4.6 Mly (19.5 ± 1.4 Mpc).[1]
The luminosity class of NGC 3220 is II, and it exhibits a broad H I line.[1]
NGC 3264 Group
NGC 3220 is a galaxy that is bright in X-rays[1] and is a member of the NGC 3264 group, which contains six galaxies. The five other members are NGC 3206, NGC 3264, NGC 3353, UGC 5848, and UGCA 211.[4]
The same group with the same galaxies was also identified in a study published by A. M. Garcia in 1993.[5]
NGC 3206 and NGC 3220 lie in the same region of the sky and, according to a study conducted by Abraham Mahtessian in 1988, they form a galaxy pair.[6]
