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Virgo A

Virgo Galaxy, Smoking Gun Galaxy, M87, NGC 4486

Proper NamesVirgo A, Virgo Galaxy, Smoking Gun Galaxy
Messier NumberM87
NGC/IC NumberNGC 4486
ConstellationVirgo
Right Ascension12h 30m 49s
Declination+12° 23' 28"
Distancec. 53,900,000 light years
c. 16,520,000 parsecs
MagnitudeApparent: +8.67
Absolute: -22.42
DimensionsApparent: 7.1' x 6.7'
Actual diameter: 113,300 light years
Hubble TypeE-E/S0 elliptical (lenticular)
Optimum VisibilityApril

A truly immense Elliptical Galaxy some 53.9 million light years from Earth, lying at the heart of the Virgo Cluster of galaxies. The cluster covers a considerable area of the sky stretching between Virgo and its neighbouring constellation to the north, Coma Berenices, with Virgo A falling just to the south of the border between these constellations, so placing it within Virgo.

The massive elliptical galaxy Virgo A or Messier 87 lies deep within the Virgo Cluster of galaxies. The linear feature seen here extending from the galaxy to the southwest (lower right) is a jet of plasma expelled by the supermassive black hole in the core of the galaxy. Imagery provided by Aladin sky atlas

This is the most massive galaxy within the Virgo Cluster, approximately two hundred times more massive than our own Milky Way Galaxy. As such, it is a dominant gravitational force within the cluster, and is designated the central point of the entire galactic group. It also forms part of major subgroup of galaxies within the main cluster, also designated 'Virgo A'.

The galaxy itself is of elliptical - indeed, almost spherical - shape, with a distinguishing feature being a jet of material emerging from its centre. This jet of plasma is ejected by the supermassive black hole that lies at the core of the galaxy, which is also responsible for making Virgo A an intense radio source (indeed strictly 'Virgo A' properly refers to this radio source, while the galaxy itself is Messier 87).

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