UGC 8335 (Arp 238) is a pair of strongly interacting spiral galaxies.

[4][5] UGC 8335 is about 400 million light-years from Earth, in the constellation Ursa Major.

It is the 238th object in Halton Arp's Atlas of Peculiar Galaxies.

[4] On 25 April 2012, Doug Rich discovered supernova SN 2012by in UGC 8335.

[6] SN 2012by was classified as a type II supernova by Tomasella et al. at the Astronomical Observatory of Padova.