IC 42
| Galaxy IC 42 |
|
|---|---|
|
|
| AladinLite | |
| Constellation | whale |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 00 h 41 m 05.8 s |
| declination | -15 ° 25 ′ 41 ″ |
| Appearance | |
| Morphological type | SBbc / HII |
| Brightness (visual) | 14.8 mag |
| Brightness (B-band) | 15.5 mag |
| Angular expansion | 0.70 '× 0.4' |
| Position angle | 45 ° |
| Surface brightness | 13.3 mag / arcmin² |
| Physical data | |
| Redshift | 0.054745 ± 0.000150 |
| Radial velocity | 16,412 ± 45 km / s |
|
Stroke distance v rad / H 0 |
(735 ± 52) · 10 6 ly (225.3 ± 15.8) Mpc |
| diameter | 145,000 ly |
| history | |
| discovery | Stéphane Javelle |
| Discovery date | August 25, 1892 |
| Catalog names | |
| IC 42 • UGC 448 • PGC 2463/911417 • MCG -03-02-036 • IRAS 396 + 2922 • 2MASX J00410585-1525410 • GALEX ASC J004105.69-152540.5 | |
IC 42 is a barred spiral galaxy with extensive star formation from Hubble type SBc in the constellation Cetus south of the ecliptic . It is estimated to be 735 million light years away from the Milky Way and has a diameter of around 150,000 ly.
In the same area of the sky are the galaxies NGC 187 , IC 36 , IC 37 , IC 38 .
The object was discovered by Stéphane Javelle on August 25, 1892 .