NGC 4957
| Galaxy NGC 4957 |
|
|---|---|
|
|
| SDSS | |
| AladinLite | |
| Constellation | Berenike's hair |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 13 h 05 m 12.4 s |
| declination | + 27 ° 34 ′ 11 ″ |
| Appearance | |
| Morphological type | E3 / HII |
| Brightness (visual) | 13.0 likes |
| Brightness (B-band) | 14.0 mag |
| Angular expansion | 1.2 ′ × 1.0 ′ |
| Position angle | 100 ° |
| Surface brightness | 13.2 mag / arcmin² |
| Physical data | |
| Affiliation |
Abell 1656 Coma-Cluster WBL 426-148 |
| Redshift | 0.023046 ± 0.000050 |
| Radial velocity | 6909 ± 15 km / s |
|
Stroke distance v rad / H 0 |
(310 ± 22) x 10 6 ly (94.9 ± 6.6) Mpc |
| history | |
| discovery | Wilhelm Herschel |
| Discovery date | April 11, 1785 |
| Catalog names | |
| NGC 4957 • UGC 8178 • PGC 45253 • CGCG 160-130 • MCG + 05-31-124 • 2MASX J13051235 + 2734113 • GC 3396 • H II 397 • h 1526 • GALEX ASC J130512.48 + 273412.1 • LDCE 926 NED074 | |
NGC 4957 is a 13.0 likes bright elliptical galaxy with extensive star formation from Hubble type E3 in the constellation Coma Berenices the northern sky . It is an estimated 310 million light years away from the Milky Way and has a diameter of about 110,000 ly. The galaxy is considered a member of the Coma galaxy cluster .
In the same area of the sky are u. a. the galaxies NGC 4934 , NGC 4943 , NGC 4960 , IC 4133 .
The object was discovered on April 11, 1785 by Wilhelm Herschel with an 18.7-inch reflector telescope, who described it as "F, S".