NGC 4794
| Galaxy NGC 4794 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Crow |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 55 m 10.5 s |
| declination | -12 ° 36 ′ 30 ″ |
| Appearance | |
| Morphological type | SB (rs) a |
| Brightness (visual) | 13.6 mag |
| Brightness (B-band) | 14.5 mag |
| Angular expansion | 1.7 ′ × 0.7 ′ |
| Position angle | 153 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Redshift | 0.013232 +/- 0.000100 |
| Radial velocity | 3967 +/- 30 km / s |
|
Stroke distance v rad / H 0 |
(172 ± 12) · 10 6 ly (52.8 ± 3.7) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | March 27, 1786 |
| Catalog names | |
| NGC 4794 • PGC 44012 • MCG -02-33-060 • 2MASX J12551051-1236303 • GC 3301 • H III 538 • LDCE 0921 NED046 | |
NGC 4794 is a 13.6 mag bright bar spiral galaxy of the Hubble type SBa in the constellation Raven in the southern sky . It is estimated to be 172 million light years from the Milky Way and about 90,000 light years across .
In the same area of the sky are the galaxies NGC 4782 , NGC 4783 , NGC 4792 , NGC 4802 , among others .
The object was discovered on March 27, 1786 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "eF, S, easily resolvable".