NGC 991

NGC 991
SDSS image of NGC 991
Observation data (J2000 epoch)
ConstellationCetus
Right ascension02h 35m 32.68341s[1]
Declination−07° 09′ 15.8406″[1]
Redshift0.005126[2]
Heliocentric radial velocity1532.8 km/s[2]
Distance62.9 ± 4.5 Mly (19.28 ± 1.37 Mpc)[3]
Apparent magnitude (B)12.36[2]
Characteristics
TypeSAB(rs)c[3]
Other designations
MCG -01-07-023, PGC 9846[2]

NGC 991 is an intermediate spiral galaxy the constellation Cetus. This galaxy was discovered by astronomer William Herschel in 1785.[4][5][6]

A type Ib supernova designated SN 1984L was discovered in this galaxy in late August 1984 by R. Evans.[7] SN 1984L (type II, mag. 13.5),[8]

References

  1. ^ a b Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051.
  2. ^ a b c d "NGC 991". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-06-03.
  3. ^ a b "Results for object NGC 0991 (NGC 991)". NASA/IPAC Extragalactic Database. California Institute of Technology. Retrieved 2020-06-03.
  4. ^ "Your NED Search Results". ned.ipac.caltech.edu. Retrieved 2020-03-24.
  5. ^ "Revised NGC Data for NGC 991". spider.seds.org. Retrieved 2020-03-24.
  6. ^ Ford, Dominic. "The galaxy NGC 991 - In-The-Sky.org". in-the-sky.org. Retrieved 2020-03-24.
  7. ^ Wheeler, J. C.; Levreault, R. (July 1985). "The peculiar type I supernova in NGC 991". Astrophysical Journal. 294: L17–L20. Bibcode:1985ApJ...294L..17W. doi:10.1086/184500.
  8. ^ Transient Name Server entry for SN 1984L. Retrieved 23 January 2024.
  • Media related to NGC 991 at Wikimedia Commons


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