Messier 84

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This article is about the galaxy M84. For the Yugoslav tank, see M-84.
Messier 84
Messier 84 nucleus by HST
M84. Credit:NOAO.
Observation data (J2000 epoch)
Constellation Virgo
Right ascension 12h 25m 03.7s[1]
Declination +12° 53′ 13″[1]
Redshift 1060 ± 6 km/s[1]
Distance 60 ± 3 Mly (18.4 ± 0.9 Mpc)[2]
Type E1[1]
Apparent dimensions (V) 6′.5 × 5′.6[1]
Apparent magnitude (V) 10.1[1]
Other designations
NGC 4374,[1] UGC 7494,[1] PGC 40455,[1] VCC 763[1]
See also: Galaxy, List of galaxies

Messier 84 (also known as M84 or NGC 4374) is an elliptical or lenticular galaxy in the constellation Virgo. M84 is situated in the heavily populated inner core of the Virgo Cluster of galaxies.[3]

Radio observations and Hubble Space Telescope images of M84 have revealed two jets of matter shooting out from the galaxy's center as well as a disk of rapidly rotating gas and stars indicating the presence of a 1.5 ×109 M☉[4] supermassive black hole. It also has a few young stars and star clusters, indicating star formation at a very low rate.[5]

History

Charles Messier discovered Messier 84 on 18 March 1781 in a systematic search for "nebulous objects" in the night sky.[6] The object is the 84th in the Messier Catalogue.

Supernovae

Two supernovae have been observed in M84: SN 1957[7] and SN 1991bg.[8] Possibly, a third, SN 1980I is part of M84 or, alternatively, one of its neighboring galaxies, NGC 4387 and M86.[9]

References

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External links

Coordinates: Sky map 12h 25m 03.7s, +12° 53′ 13″

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