NGC 2805
| NGC 2805 | |
|---|---|
NGC 2805 imaged by the Hubble Space Telescope | |
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 09h 20m 20.3551s |
| Declination | +64° 06′ 10.771″ |
| Redshift | 0.005779 |
| Heliocentric radial velocity | 1733 ± 1 km/s |
| Distance | 88.2 ± 6.2 Mly (27.05 ± 1.90 Mpc) |
| Apparent magnitude (V) | 11.0 |
| Characteristics | |
| Type | SAB(rs)d |
| Size | ~90,800 ly (27.84 kpc) (estimated) |
| Apparent size (V) | 6.3′ × 4.8′ |
| Other designations | |
| IRAS 09162+6418, 2MASX J09202040+6406099, UGC 4936, MCG +11-12-003, PGC 26410, CGCG 312-002 | |
NGC 2805 is a intermediate spiral galaxy in the constellation of Ursa Major. Its velocity with respect to the cosmic microwave background is 1834 ± 7 km/s, which corresponds to a Hubble distance of 27.05 ± 1.90 Mpc (~88.2 million light-years). However, 11 non redshift measurements give a distance of 12.76 ± 11.89 Mpc (41.6 million light-years). (Note: this sample of measurements is inconsistent: seven values between 3.03 Mpc and 5.13 Mpc are reported in publications from 1984 to 1985, then four values between 26.8 Mpc and 28.8 Mpc.) The galaxy was discovered by German-British astronomer William Herschel on 2 April 1791.
One supernova has been observed in NGC 2805: SN 2019hsw (type II, mag. 15.4) was discovered by ASAS-SN on 18 June 2019.