NGC 4989
| Galaxy NGC 4989 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Virgin |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 13 h 09 m 16.0 s |
| declination | -05 ° 23 ′ 47 ″ |
| Appearance | |
| Morphological type | S0 / a |
| Brightness (visual) | 13.3 mag |
| Brightness (B-band) | 14.3 mag |
| Angular expansion | 1.6 ′ × 0.9 ′ |
| Position angle | 171 ° |
| Surface brightness | 13.6 mag / arcmin² |
| Physical data | |
| Redshift | 0.010391 +/- 0.000057 |
| Radial velocity | 3115 +/- 17 km / s |
|
Stroke distance v rad / H 0 |
(135 ± 9) · 10 6 ly (41.5 ± 2.9) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 17, 1784 |
| Catalog names | |
| NGC 4989 • PGC 45606 • MCG -01-34-005 • 2MASX J13091607-0523469 • GC 3421, 3426 • H II 185 • LDCE 947 NED001 | |
NGC 4989 is a 13.3 mag bright lenticular galaxy of the Hubble type S0 / a in the constellation Virgo on the ecliptic . It is estimated to be 135 million light years away from the Milky Way and has a diameter of around 65,000 ly.
In the same area of the sky are the galaxies NGC 4975 , NGC 4990 , IC 855 , among others .
The object was discovered on April 17, 1784 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as “F, S, iF, near a pretty bright star”.