Arp 146
Interacting galaxies in the constellation Cetus
From Wikipedia, the free encyclopedia
Arp 146 (known as PGC 509 and PGC 510) are a pair of interacting galaxies located 1.05 billion light-years away from Earth in the Cetus constellation.[1][2][3] It was discovered by Dewhirst and catalogued by Boris Vorontsov-Velyaminov as VV 790.[4] Under the Atlas of Peculiar Galaxies created by Halton Arp, they are categorized under galaxies that have associated rings.[5]
| Arp 146 | |
|---|---|
| |
| Observation data (J2000.0 epoch) | |
| Constellation | Cetus |
| Right ascension | 00h 06m 44.4s |
| Declination | −06° 38′ 09.0″ |
| Redshift | 0.075440 |
| Heliocentric radial velocity | 22,616 km/s |
| Distance | 1.05 Gly |
| Characteristics | |
| Type | RING |
| Other designations | |
| PGC 509 and PGC 510, Arp 146, VV 790 | |
Arp 146 is classified as an example of an empty ring galaxy.[6][7] According to a study, one galaxy appears to have passed through another, leaving behind a ring formed from the bridge material and remnants of the nucleus.[8] The ring is said to be 18"x11" elliptical measuring 20 kpc in diameter but separated from its companion.[4]
