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 (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 is classfied 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]