Messier 89
| 300px | |
| Messier 89 on DSS2 all sky survey. | |
| Observation data Epoch J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 12h 35m 39.8s[2] |
| Declination | +12° 33′ 23″[2] |
| Apparent dimension (V) | 5.1 × 4.7 moa[2] |
| Apparent magnitude (V) | 10.73[2] |
| Characteristics | |
| Type | E[2], LINER[2], HIISy2[2] |
| Astrometry | |
| Heliocentric radial velocity | 340 ± 4[2] km/s |
| Redshift | 0.001134 ± 0.000014[2] |
| Galactocentric velocity | 290 ± 5[2] km/s |
| Distance | 50 ± 3 Mly (15.33 ± 0.92 Mpc) |
| Other designations | |
| Database references | |
| SIMBAD | Search M89 data
|
| See also: Galaxy, List of galaxies | |
Messier 89 (M89 for short, also known as NGC 4552) is an elliptical galaxy in the constellation Virgo. It was discovered by Charles Messier on March 18 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 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 quasar or radio galaxy.[4]
M89 also has a large population of globular clusters as compared to the Milky Way's 150-200, a 2006 survey out to 10′ of its core estimates that there are 2,000 ± 700 globulars within 25′ of M89.[5]
External links
- Messier 89 on WikiSky: DSS2, SDSS, GALEX, IRAS, Hydrogen α, X-Ray, Astrophoto, Sky Map, Articles and images
References
- ↑ 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.
- ↑ 2.00 2.01 2.02 2.03 2.04 2.05 2.06 2.07 2.08 2.09 2.10 2.11 2.12 Lua error in Module:Citation/CS1 at line 379: attempt to call method 'match' (a nil value).
- ↑ Elliptical Galaxy M89 @ SEDS Messier pages
- ↑ Messier Objects 81-90 @ Sea and Sky
- ↑ 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.
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zh-min-nan:Messier 89 be:Аб'ект Месье M89 bg:M89 ca:Messier 89 cs:Messier 89 co:M89 de:Messier 89 es:Galaxia elíptica M89 eo:M89 fa:مسیه ۸۹ fr:M89 ko:M89 (천체) hr:Messier 89 it:M89 (astronomia) lt:Mesjė 89 hu:Messier 89 nl:Messier 89 ja:M89 pl:Messier 89 ro:Messier 89 ru:Галактика M89 sk:Galaxia M89 fi:Messier 89 sv:M89 uk:NGC 4552 zh:M89 (橢圓星系)