NGC 4840
| Galaxy NGC 4840 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Berenike's hair |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 57 m 32.8 s |
| declination | + 27 ° 36 ′ 37 ″ |
| Appearance | |
| Morphological type | SAB0 / E1 |
| Brightness (visual) | 13.7 mag |
| Brightness (B-band) | 14.7 mag |
| Angular expansion | 0.7 x 0.7 |
| Surface brightness | 13.0 mag / arcmin² |
| Physical data | |
| Affiliation | Abell 1656 |
| Redshift | 0.020304 +/- 0.000031 |
| Radial velocity | 6087 +/- 9 km / s |
|
Stroke distance v rad / H 0 |
(272 ± 19) · 10 6 ly (83.5 ± 5.8) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 11, 1785 |
| Catalog names | |
| NGC 4840 • PGC 44324 • CGCG 160-042 • MCG + 05-31-029 • 2MASX J12573284 + 2736368 • GC 5684 • H II 385 • LDCE 0926 NED032 | |
NGC 4840 is a 13.7 may bright elliptical galaxy from the Hubble type E1 in the constellation hair Berenike . It is estimated to be 272 million light-years from the Milky Way and about 60,000 light years in diameter.
The object was discovered on April 11, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "F, pL".