NGC 3157
| Galaxy NGC 3157 / IC 2555 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | Air pump |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 10 h 11 m 42.4 s |
| declination | -31 ° 38 ′ 34 ″ |
| Appearance | |
| Morphological type | SAB (s) c / HII |
| Brightness (visual) | 13.2 mag |
| Brightness (B-band) | 13.9 likes |
| Angular expansion | 2.50 x 0.5 |
| Position angle | 38 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.009477 ± 0.000010 |
| Radial velocity | 2841 ± 3 km / s |
|
Stroke distance v rad / H 0 |
(117 ± 8) · 10 6 ly (36 ± 2.5) Mpc |
| history | |
| discovery | John Herschel |
| Discovery date | January 28, 1835 |
| Catalog names | |
| NGC 3157 • IC 2555 • PGC 29691 • ESO 435-051 • MCG -05-24-026 • IRAS 10094-3123 • 2MASX J10114242-3138341 • SGC 100928-3123.7 • HIPASS J1011-31 • LDCE 729 NED048 | |
NGC 3157 = IC 2555 is a bar-spiral galaxy with extensive star formation regions of the Hubble type SBc in the constellation Antila in the southern sky . It is estimated to be 117 million light years from the Milky Way and about 90,000 light years in diameter.
The type II supernova candidate ASASSN -15jp was observed here.
The object was discovered by John Herschel on January 28, 1835 . The galaxy was rediscovered on May 1, 1900 by DeLisle Stewart and added to the Index Catalog .