Messier Index/M89

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Messier 89[1]
Observation data (w:J2000 epoch)
Constellation Virgo
Right ascension 12h 35m 39.8s[2]
Declination +12° 33′ 23″[2]
Type E[2], w:LINER[2], HIISy2[2]
Apparent magnitude (V) 10.73[2]
Other designations
NGC 4552,[2] UGC 7760,[2] PGC 41968[2]

Messier 89 (M89 for short, also known as NGC 4552) is an w:elliptical galaxy in the constellation Virgo. It was discovered by w:Charles Messier on w:March 18 w:1781. M89 is a member of the Virgo Cluster of galaxies.[3]

Unusual features

Current observations indicate that M89 may be nearly perfectly spherical in shape. This would be unusual as all other known elliptic galaxies are relatively elongated w:ellipsoids.[citation needed] However, it is possible that the galaxy is oriented in such a way that it appears spherical to an observer on Earth but is in fact elliptical.

The galaxy also features a surrounding structure of gas and dust extending up to 150,000 light-years from the galaxy and jets of heated particles that extend 100,000 light-years outwards, indications that it may have once been an active w:quasar or w:radio galaxy.[4]

M89 also has a large population of w:globular clusters as compared to the w:Milky Way's 150-200, a w:2006 survey out to 10′ of its core estimates that there are 2,000 ± 700 globulars within 25′ of M89.[5]

References

  1. J. L. Tonry, A. Dressler, J. P. Blakeslee, E. A. Ajhar, A. B. Fletcher, G. A. Luppino, M. R. Metzger, C. B. Moore (2001). "The SBF Survey of Galaxy Distances. IV. SBF Magnitudes, Colors, and Distances". Astrophysical Journal 546 (2): 681–693. doi:10.1086/318301. http://adsabs.harvard.edu/abs/2001ApJ...546..681T. 
  2. a b c d e f g h i "NASA/IPAC Extragalactic Database". Results for NGC 4552. http://nedwww.ipac.caltech.edu/. Retrieved 2006-10-24. 
  3. Elliptical Galaxy M89 @ SEDS Messier pages
  4. Messier Objects 81-90 @ Sea and Sky
  5. Tamura, Naoyuki; Sharples, Ray M.; Arimoto, Nobuo; Onodera, Masato; Ohta, Kouji; Yamada, Yoshihiko (2006). "A Subaru/Suprime-Cam wide-field survey of globular cluster populations around M87 - I. Observation, data analysis and luminosity function". Monthly Notices of the Royal Astronomical Society Online Early: 588. doi:10.1111/j.1365-2966.2006.11067.x. http://adsabs.harvard.edu/cgi-bin/nph-bib_query?doi=10.1111%2Fj.1365-2966.2006.11067.x.