NGC 89

NGC 89
NGC 89 (bottom) surrounded by the other galaxies in Robert's Quartet
Observation data (J2000 epoch)
ConstellationPhoenix
Right ascension00h 21m 24.355s
Declination−48° 39′ 55.28″
Redshift0.011074 ± 0.000067
Distance144 ± 10 Mly (44.1 ± 3.1 Mpc)
Apparent magnitude (V)14.18
Characteristics
TypeSB0/a pec
Apparent size (V)0′.957 × 0′.459
Other designations
PGC 1374, ESO 194-G011

NGC 89 is an unbarred spiral galaxy located approximately 150 million light-years away in the southern constellation of Phoenix. It was discovered on September 30, 1834, by the English astronomer John Herschel.

Physical characteristics

NGC 87 is classified morphologically as a barred or intermediate spiral galaxy with peculiar features induced by tidal perturbation. At its distance of 150 million light-years, its angular diameter corresponds to a physical size of roughly 50,000 light-years across.

The galaxy features an active galactic nucleus (AGN) classified as a Seyfert 2 nucleus. High-resolution imaging reveals a prominent dust lane crossing the central region and asymmetric spiral arms displaying star-forming regions triggered by interaction with its neighbors.

Group membership

NGC 89 is a member of Robert's Quartet, a compact galaxy group located in Phoenix that also includes NGC 87, NGC 88, and NGC 92. The four member galaxies reside within a region spanning roughly 150,000 light-years across and exhibit active gravitational interactions.

See also

References

  1. 1 2 3 Skrutskie, Michael F.; Cutri, Roc M.; Stiening, Rae; Weinberg, Martin D.; Schneider, Stephen E.; Carpenter, John M.; Beichman, Charles A.; Capps, Richard W.; Chester, Thomas; Elias, Jonathan H.; Huchra, John P.; Liebert, James W.; Lonsdale, Carol J.; Monet, David G.; Price, Stephan; Seitzer, Patrick; Jarrett, Thomas H.; Kirkpatrick, J. Davy; Gizis, John E.; Howard, Elizabeth V.; Evans, Tracey E.; Fowler, John W.; Fullmer, Linda; Hurt, Robert L.; Light, Robert M.; Kopan, Eugene L.; Marsh, Kenneth A.; McCallon, Howard L.; Tam, Robert; Van Dyk, Schuyler D.; Wheelock, Sherry L. (1 February 2006). "The Two Micron All Sky Survey (2MASS)". The Astronomical Journal. 131 (2): 1163–1183. Bibcode:2006AJ....131.1163S. doi:10.1086/498708. ISSN 0004-6256. S2CID 18913331.
  2. ↑ Boselli, A.; et al. (October 1996), "The molecular gas content of spiral galaxies in compact groups.", Astronomy and Astrophysics, 314: 738–744, Bibcode:1996A&A...314..738B.
  3. 1 2 "NED results for object NGC 0089". NASA/IPAC Extragalactic Database. Jet Propulsion Laboratory/California Institute of Technology. Retrieved 2015-10-06.
  4. ↑ Presotto, V.; et al. (December 2009), "SCG0018-4854: A young and dynamic compact group", Astronomische Nachrichten, 330 (9–10): 988–990, arXiv:0910.4978, Bibcode:2009AN....330..988P, doi:10.1002/asna.200911275.
  5. ↑ "NASA/IPAC Extragalactic Database Results for NGC 0089". NASA/IPAC. Retrieved August 18, 2026.
  6. ↑ Sinnott, Roger W. (1988). NGC 2000.0: The Complete New General Catalogue and Index Catalogues of Nebulae and Star Clusters by J. L. E. Dreyer. Sky Publishing Corporation. ISBN 978-0-933346-51-2.
  7. 1 2 "Cosmic Portrait of a Perturbed Family". ESO News. European Southern Observatory. November 4, 2005. Retrieved August 18, 2026.