Arp 54 is a little-known interacting pair at a distance of ~570 million light-years. It shows up in infrared surveys, as a radio source as well as an x-ray source, so it apparently is experiencing very vigorous star formation or perhaps has an obscured active galactic nucleus (AGN) — both signs of an interaction. Arp placed it in his classification of “Spiral galaxies with high surface brightness companion on arm”, though it doesn’t appear that the arm from the larger galaxy reaches the smaller galaxy. The edge-on to the south is not related to Arp 54.

Using 375x the larger galaxy (PGC 9113) appeared fairly faint, elongated 3:2 E-W, 30″x20″, fairly low surface brightness, weak concentration. Its interacting companion PGC 9107 is just 0.9′ WSW. It was a very small faint glow, only 12″ diameter. Although it easily popped into view with averted I couldn’t hold continuously. A mag 14.4 star is 0.5’ SW.