The 715 km/sec recessional velocity of PGC 57678 is too small to give a reliable redshift-based distance estimate, though the corresponding Hubble expansion distance of 35 million light years happens to be in reasonable agreement with a redshift-independent distance estimate of 50 million light years. Using the latter distance and its apparent size of 2.6 by 2.1 arcmin, PGC 57678 is about 40 thousand light years across. The galaxy is one of six chosen by Halton Arp for his Atlas of Peculiar Galaxies as an example of spiral galaxies of low surface brightness, hence its designation as Arp 2.