NGC 4020
| NGC 4020 | |
|---|---|
| Observation data (J2000.0 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 58m 56,8s |
| Declination | +30° 24′ 49″ |
| Redshift | 0.002535 |
| Distance | 40.7 million LY |
| Apparent magnitude (V) | 13.10 |
| Characteristics | |
| Apparent size (V) | 1.90 x 1.0 |
| Other designations | |
| UGC 06971, CGCG 157-072, CGCG 1156.3+3041, MCG +05-28-066 | |
NGC 4020 is a spiral galaxy in the constellation Ursa Major. It's classified as a type SAcd galaxy. The galaxy was first discovered in 1788 by astronomer William Herschel and again in 1831 by John Herschel. It's around 22,500 light years across at its longest diameter.
John Louis Emil Dreyer, compiler of the New General Catalogue, described it as, "pretty bright, pretty large, extended 19.5°, binuclear.”
Its radial velocity, relative to the cosmic microwave background is measured around 1048 ± 20 km/s, and a Hubble distance of around 15.46 ± 1.12 Mpc.