IC 3639
| Galaxy IC 3639 |
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|---|---|
![IC 3639 [1]](https://de.wikipedia.org/wiki/Datei:PIA21087_-_Galaxy_IC_3639_with_Obscured_Active_Galactic_Nucleus.jpg)
|
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| IC 3639 | |
| AladinLite | |
| Constellation | centaur |
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Position equinox : J2000.0 , epoch : J2000.0 |
|
| Right ascension | 12 h 40 m 52.852 s |
| declination | -36 ° 45 ′ 21.11 ″ |
| Appearance | |
| Morphological type | SB (rs) bc: / Sy2 |
| Brightness (visual) | 12.3 mag |
| Brightness (B-band) | 13.1 mag |
| Angular expansion | 1.20 'x 1.2' |
| Surface brightness | 12.5 mag / arcmin² |
| Physical data | |
| Affiliation | IC 3639 group LGG 297 |
| Redshift | 0.010924 ± 0.000017 |
| Radial velocity | 3275 ± 5 km / s |
|
Stroke distance v rad / H 0 |
(139 ± 10) · 10 6 ly (42.5 ± 3.0) Mpc |
| history | |
| discovery | Lewis Swift |
| Discovery date | February 15, 1898 |
| Catalog names | |
| IC 3639 • PGC 42504 • ESO 381-008 • MCG -06-28-011 • IRAS 12381-3628 • 2MASX J12405287-3645210 • SGC 123811-3629.0 • HIPASS J1240-36 • KTS 45B | |
IC 3639 is a bar-spiral galaxy with an active nucleus of the Hubble type SBbc in the constellation Centaur in the southern sky . It is estimated to be 139 million light years from the Milky Way and about 50,000 light years across. Together with PGC 42483 and PGC 42519 , it forms the gravitationally bound galaxy trio KTS 45 . It is also the namesake of the four galaxies IC 3639 group ( LGG 297 ).
The object was discovered by Lewis Swift on February 15, 1898 .
IC 3639 group ( LGG 297 )
| Galaxy | Alternative name | Distance / million Lj |
|---|---|---|
| NGC 4574 | PGC 42166 | 124 |
| IC 3639 | PGC 42504 | 139 |
| PGC 42229 | ESO 380-050 | 124 |
| PGC 42519 | ESO 381-009 | 137 |