NGC 4857
| Galaxy NGC 4857 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Dragon |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 57 m 18.3 s |
| declination | + 70 ° 12 ′ 12 ″ |
| Appearance | |
| Morphological type | SABb |
| Brightness (visual) | 13.8 mag |
| Brightness (B-band) | 14.6 mag |
| Angular expansion | 1.3 '× 0.6' |
| Position angle | 110 ° |
| Surface brightness | 13.4 mag / arcmin² |
| Physical data | |
| Redshift | 0.028673 +/- 0.000153 |
| Radial velocity | (8596 +/- 46) km / s |
|
Stroke distance v rad / H 0 |
(390 ± 27) · 10 6 ly (119.6 ± 8.4) Mpc |
| history | |
| discovery | William Herschel |
| Discovery date | April 7, 1793 |
| Catalog names | |
| NGC 4857 • UGC 8077 • PGC 44284 • MCG + 12-12-022 • IRAS 12554 + 7028 • GC 3339 • H III 908 • | |
NGC 4857 is a barred spiral galaxy of the Hubble type SBb in the constellation Dragon in the northern sky . It is an estimated 390 million light years from the Milky Way .
The object was discovered on April 7, 1793 by William Herschel .
Individual evidence