| Arp 299 | |
|---|---|
Arp 299 with IC 694 (left) & NGC 3690 (right) |
|
| Observation data (J2000 epoch) | |
| Constellation | Ursa Major |
| Right ascension | 11h 28m 33.13s |
| Declination | +58° 33′ 58.0″ |
| Redshift | 0.010 |
| Distance | 130 Mly |
| Type | SBm pec. / IBm pec. |
| Apparent dimensions (V) | 2′.4 × 1′.9 |
| Apparent magnitude (V) | 11 |
| Notable features | interacting galaxies |
| Other designations | |
| IC 694, NGC 3690.... | |
| See also: Galaxy, List of galaxies | |
Arp 299 (also known as IC 694 and NGC 3690) is a set of galaxies approximately 134 million light-years away in the constellation Ursa Major.
Both of the galaxies involved in the collision are barred irregular galaxies.
It is not completely clear which object is historically called IC 694. According to some sources, the small appendage more than an arcminute northwest of the main pair is actually IC 694, not the primary (eastern) companion.[1][2]
The interaction of the two galaxies in Arp 299 produced young powerful starburst regions similar to that seen in II Zw 96.[3] Six supernovae have been detected in Arp 299 (SN 1992bu, SN 1993G, SN 1998T, SN 1999D were observed in NGC 3690 while SN 1990al and SN 2005U were observed in IC 694).