SN 1885A

Supernova 1885
The visual band light curve of S Andromedae, adapted from Patchett et al. (1985)[1]
Event typeSupernova, supernova remnant, near-IR source, variable star Edit this on Wikidata
I pec
Date20 August 1885 UTC
ConstellationAndromeda
Right ascension00h 42m 43.11s
Declination+41° 16′ 04.2′′
EpochJ2000.0
Galactic coordinates121.1702 -21.5741
Distance2.6 Mly
RemnantUnknown
HostAndromeda Galaxy
ProgenitorUnknown
Progenitor typeUnknown
Colour (B-V)+1.3 ~ +0.6[2]
Notable featuresFirst and only supernova observed in Andromeda;
first extragalactic supernova observed;
closest type Ia observed
Peak apparent magnitude+6
Other designationsSN 1885A, HR 182, 2MASS J00424312+4116032, BD+40 147a, S And, TIC 438234291, AAVSO 0037+40, EV* M31 V0894
Preceded bySN 1604 (observed), Cassiopeia A (unobserved, c. 1680), G1.9+0.3 (unobserved, c. 1868)
Followed bySN 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".

  1. ^ 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.
  2. ^ Cite error: The named reference devau was invoked but never defined (see the help page).
  3. ^ Frommert, Hartmut; Kronberg, Christine. "S Andromedae: Supernova 1885 in M31". SEDS Messier Database. Retrieved 2017-01-22.