Arp 273 is a pair of interacting galaxies, 300 million light years away in the constellation Andromeda. It was first described in the Atlas of Peculiar Galaxies, compiled by Halton Arp in 1966. The larger of the spiral galaxies, known as UGC 1810, is about five times more massive than the smaller galaxy.

Distance to Earth: 300 million light years

Absolute magnitude: -22.92

Apparent magnitude (V): 13.7

Distance: 300 million ly

Right ascension: 02^h 21^m 28.703^s