NGC 4531
| Galaxy NGC 4531 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Virgin |
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Position equinox : J2000.0 , epoch : J2000.0 |
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| Right ascension | 12 h 34 m 15.9 s |
| declination | + 13 ° 04 ′ 31 ″ |
| Appearance | |
| Morphological type | SB0 +; Sy / LINER |
| Brightness (visual) | 11.7 mag |
| Brightness (B-band) | 12.6 mag |
| Angular expansion | 3.1 ′ × 2 ′ |
| Position angle | 155 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.000650 ± 0.000043 |
| Radial velocity | 195 ± 13 km / s |
|
Stroke distance v rad / H 0 |
(7 ± 1) x 10 6 ly (2.0 ± 0.3) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 17, 1784 |
| Catalog names | |
| NGC 4531 • UGC 7729 • PGC 41806 • CGCG 070-175 • MCG + 02-32-141 • IRAS 12317 + 1321 • VCC 1552 • GC 3081 • H II 175 • h 1333 • LDCE 0904 NED183 | |
NGC 4531 is a lenticular galaxy of the Hubble type SB0-a in the constellation Virgo. It is estimated to be 7 million light years from the Milky Way . The radial speed of NGC 4531 of 195 km / s is too low to provide a reliable indicator of the distance, as particular speeds (without Hubble expansion) could make up a substantial part of the value. In fact, the 7 million light-year distance corresponding to its speed is far less than the redshift-independent distance estimate of around 50 million light-years.
The object was discovered on April 17, 1784 by the astronomer Wilhelm Herschel .