| Right Ascension | 12 : 29.8 (h:m) |
|---|---|
| Declination | +08 : 00 (deg:m) |
| Distance | 60000 (kly) |
| Visual Brightness | 8.4 (mag) |
| Apparent Dimension | 9x7.5 (arc min) |
| Discovered by | Charles Messier Feb 19th, 1771 |
Elliptical galaxy M49 was the first member of the Virgo cluster of galaxies discovered, by Charles Messier on February 19, 1771. It is also one of the brightest with its mag 8.5, which corresponds to an absolute magnitude of approximately -22.8, regarding its distance of about 60 million light years. It is one of the giant elliptical galaxies in this great cluster (besides M60 and M87), and is of type E4 in Hubble's classification scheme. Its extension of 9x7.5 arc minutes corresponds to an ellipsoid with a projected major axis of nearly 160,000 light years (we don't know the real extension along the line of sight toward us, of course, as we don't know the spatial orientation of the real ellipsoid axes), so it is actually a big ellipsoid. Older estimates have suggested a mass which might be bigger than that of the nearby giant M87, but now it is assumed that M87 is much denser. With its integrated spectral class G7 and color index +0.76, it is yellower than most galaxies in the Virgo cluster. Longer exposures show a system of globular cluster, which however is much less crowded than that of M87 and more comparable to that of M60. According to W.E. Harris' list, this galaxy has a system of 6300 +/- 1900 globulars.
A probable supernova, 1969Q, of mag 13.0 was reported in this galaxy in June, 1969.
Messier observed M49 on February 19th, 1771 " Compared the comet of 1779 with this cluster on 22 and 23 April : the comet and the nebula had the same luminosity." Charles Messier
Close by: M61
Courtesy www.seds.org