NGC 4989
Galaxy NGC 4989 |
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AladinLite | |
Constellation | Virgin |
Position equinox : J2000.0 , epoch : J2000.0 |
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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”.