 | |
| Event type | Supernova, supernova remnant, near-IR source, variable star  |
|---|---|
| I pec | |
| Date | 20 August 1885 UTC |
| Constellation | Andromeda |
| Right ascension | 00h 42m 43.11s |
| Declination | +41° 16′ 04.2′′ |
| Epoch | J2000.0 |
| Galactic coordinates | 121.1702 -21.5741 |
| Distance | 2.6 Mly |
| Remnant | Unknown |
| Host | Andromeda Galaxy |
| Progenitor | Unknown |
| Progenitor type | Unknown |
| Colour (B-V) | +1.3 ~ +0.6[2] |
| Notable features | First and only supernova observed in Andromeda; first extragalactic supernova observed; closest type Ia observed |
| Peak apparent magnitude | +6 |
| Other designations | SN 1885A, HR 182, 2MASS J00424312+4116032, BD+40 147a, S And, TIC 438234291, AAVSO 0037+40, EV* M31 V0894 |
| Preceded by | SN 1604 (observed), Cassiopeia A (unobserved, c. 1680), G1.9+0.3 (unobserved, c. 1868) |
| Followed by | SN 1895B |
SN 1885A (also S Andromedae) was a supernova in the Andromeda Galaxy, the only one seen in that galaxy so far by astronomers. It was the first supernova ever seen outside the Milky Way,[3] though it was not appreciated at the time how far away it was. It is also known as "Supernova 1885".
- ^ Patchett, B. E.; Stickland, D. J.; Crilly, D.; Wood, R. (December 1985). "A revised light curve for the 1885 supernova in M 31". The Observatory. 105: 232–238. Bibcode:1985Obs...105..232P.
- ^ Cite error: The named reference
devauwas invoked but never defined (see the help page). - ^ Frommert, Hartmut; Kronberg, Christine. "S Andromedae: Supernova 1885 in M31". SEDS Messier Database. Retrieved 2017-01-22.