IC 4
| Galaxy IC 4 |
|
|---|---|
|
|
| SDSS recording | |
| AladinLite | |
| Constellation | Pegasus |
|
Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 13 m 26.9 s |
| declination | + 17 ° 29 ′ 11 ″ |
| Appearance | |
| Morphological type | Sc: |
| Brightness (visual) | 13.1 mag |
| Brightness (B-band) | 13.8 mag |
| Angular expansion | 1 ′ × 0.9 ′ |
| Position angle | 10 ° |
| Surface brightness | 12.9 mag / arcmin² |
| Physical data | |
| Redshift | 0.016692 +/- 0.000033 |
| Radial velocity | 5004 +/- 10 km / s |
|
Stroke distance v rad / H 0 |
(230 ± 16) x 10 6 ly (70.6 ± 4.9) Mpc |
| history | |
| discovery | Frederick Pechüle |
| Discovery date | September 12, 1893 |
| Catalog names | |
| IC 4 • UGC 123 • PGC 897 • CGCG 456-040 • MCG + 03-01-29 • IRAS 00108 + 1712 • KUG 0010 + 172 • 2MASX J00132695 + 1729111 • GALEX ASC J001326.89 + 172911.9 • LDCE 11 NED001 | |
IC 4 is a spiral galaxy of Hubble type Sc in the constellation Pegasus at the northern sky . It is estimated to be 230 million light-years away from the Milky Way and has a diameter of about 65,000 ly
. a. the galaxy NGC 57 .
The object was discovered by Frederick Pechüle on September 12, 1893 .