IC 657
| Galaxy IC 657 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | lion |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 10 h 57 m 53.57 s |
| declination | -04 ° 54 ′ 17.8 ″ |
| Appearance | |
| Morphological type | SB (rs) a? / Sy2 |
| Brightness (visual) | 15.0 mag |
| Brightness (B-band) | 15.9 mag |
| Angular expansion | 1.20 ′ × 0.5 ′ |
| Position angle | 165 ° |
| Surface brightness | 14.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.032316 ± 0.000027 |
| Radial velocity | 9688 ± 8 km / s |
|
Stroke distance v rad / H 0 |
(426 ± 30) x 10 6 ly (130.7 ± 9.1) Mpc |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | May 18, 1893 |
| Catalog names | |
| IC 657 • PGC 32966 • MCG -01-28-009 • 2MASX J10575355-0454179 • 2MASS J10575357-0454177 • WISEA J105753.57-045417.6 | |
IC 657 is a spiral galaxy of the Hubble type Sa with an active galaxy core in the constellation Leo on the ecliptic . It is an estimated 426 million light years away from the Milky Way and about 155,000 light years in diameter .
The object was discovered by Stéphane Javelle on May 18, 1893 .