NGC 89

NGC 89 is a barred spiral or lenticular galaxy, part of Robert's Quartet, a group of four interacting galaxies.

NGC 89
Robert's Quartet galaxy group
NGC 89 (bottom) surrounded by the other galaxies in Robert's Quartet
Observation data (J2000 epoch)
ConstellationPhoenix
Right ascension00h 21m 24.355s[1]
Declination−48° 39′ 55.28″[1]
Redshift0.011074 ± 0.000067[2]
Distance144 ± 10 Mly (44.1 ± 3.1 Mpc)[3]
Apparent magnitude (V)14.18[3]
Characteristics
TypeSB0/a pec[4]
Apparent size (V)0′.957 × 0′.459[1]
Other designations
PGC 1374, ESO 194-G011

This member has a Seyfert 2 nucleus with extra-planar features emitting H-alpha radiation. There are filamentary features on each side of the disk, including a jet-like structure extending about 4 kpc in the NE direction. It may have lost its neutral hydrogen (H1) gas due to interactions with the other members of the clusters—most likely NGC 92.[4]

References
  1. 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. "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.


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