NGC 4556
| Galaxy NGC 4556 |
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|---|---|
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| SDSS recording | |
| AladinLite | |
| Constellation | Berenike's hair |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 35 m 45.8 s |
| declination | + 26 ° 54 ′ 32 ″ |
| Appearance | |
| Morphological type | E2: |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 14.2 mag |
| Angular expansion | 1.2 '× 1.0' |
| Position angle | 80 ° |
| Surface brightness | 13.5 mag / arcmin² |
| Physical data | |
| Redshift | 0.024987 +/- 0.000093 |
| Radial velocity | 7491 +/- 28 km / s |
|
Stroke distance v rad / H 0 |
(335 ± 23) x 10 6 ly (102.6 ± 7.2) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 11, 1785 |
| Catalog names | |
| NGC 4556 • UGC 7765 • PGC 41980 • CGCG 159-022 • MCG + 05-30-027 • 2MASX J12354585 + 2654317 • GC 3100 • H II 380 • h 1351 • LDCE 905 NED001 | |
NGC 4556 is an elliptical galaxy from the Hubble type E2 in the constellation Coma Berenices the northern sky . It is estimated to be 335 million light years away from the Milky Way and has a diameter of around 120,000 ly.
In the same area of the sky are the galaxies NGC 4558 , NGC 4563 , IC 3556 , IC 3561 .
The object was discovered on April 11, 1785 by the German-British astronomer Wilhelm Herschel .