NGC 861 is a spiral galaxy in the constellation Triangulum. It is estimated to be 360 million light-years from the Milky Way[3] and has a diameter of approximately 165,000 light-years. The object was discovered on September 18, 1865 by Heinrich d'Arrest.[4][5][6]
| NGC 861 | |
|---|---|
 Pan-STARRS image of NGC 861 | |
| Observation data (J2000 epoch) | |
| Constellation | Triangulum |
| Right ascension | 02h 15m 51.146s[1] |
| Declination | +35° 54′ 48.89″[1] |
| Redshift | 0.027249[2] |
| Heliocentric radial velocity | 8058 km/s[2] |
| Distance | 360.7 Mly (110.59 Mpc)[3] |
| Apparent magnitude (B) | 14.8[2] |
| Characteristics | |
| Type | Sb[2] |
| Other designations | |
| UGC 1737, MCG +06-06-003, PGC 8652[2] | |