NGC 991

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

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

Supernova

One supernova has been observed in NGC 991: SN 1984L (Type Ib, mag. 14) was discovered by Robert Evans on 28 August 1984.

See also

References

  1. 1 2 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. 1 2 3 4 "NGC 991". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-06-03.
  3. 1 2 "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. ↑ Waagen, E.; Evans, R.; Cragg, T.; Dunbar, S.; Helin, E.; Barucci, M.; Swanson, S. (1984). "Supernova in NGC 991". International Astronomical Union Circular (3979): 1. Bibcode:1984IAUC.3979....1W.
  8. ↑ "SN 1984L". Transient Name Server. IAU. Retrieved 5 December 2024.
  9. ↑ 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.