Object name: ARP201
Arp 201/UGC 224 is a pair of galaxies located about 824 to 830 million light years distant (depending on which redshift value you use) and is located in the constellation of Pisces near its border with Cetus. The pair are usually considered as interacting. Arp's note reads: "VV connection between galaxies not seen here or on Survey prints." I can't see a connection on my image either. However, a 1986 note at NED reads: "Interacting pair of E (south) and S0 (north) galaxies. Faint matter is ejected northward from the latter." Is it this "faint matter" that caught Arp's eye? He has it classed under galaxies with matter ejected from nuclei. The note's authors consider these stars, dust and gas as being ejected by some force from the northern galaxy. More likely it is some sort of tidal plume and could have come from either galaxy. It is quite a bit bluer than either galaxy. That would indicate that mostly dust and gas was pulled from one of the galaxies and has formed into new stars since the plume was created. It could be a third galaxy hiding behind the other two. In fact, I'm leaning to that idea.