Object name: ARP058
Arp 58, UGC 4457 is a bit over a half billion light-years away in the constellation of Cancer, not far from M44, the Beehive Cluster. I tried taking this at 0.5" per pixel but seeing wasn't really up to it so I reduced the image to 0.75" per pixel. Still higher than my normal image scale. Arp classifies this one as a spiral with a small, high surface brightness companion same as Arp 52. His notes say; "...companion on end of broken arm nearly star-like". I'd have to agree. Actually, there may be two galaxies on the arm and the arm appears detached from the galaxy to me. The obvious galaxy on the lower arm segment is LEDA 023937 an E0 elliptical galaxy that appears nearly starlike. What's really odd is that it is blue in color. Ellipticals aren't supposed to be blue as they are usually said to lack the dust and gas needed for new star formation. I could find no explanation for its blue color except one paper saying it's not a galaxy at all (see below). Unlike the also blue companion of Arp 52 which was also blue, this one does have a classification and distance. The distance is the same as UGC 4457 so we know it is a true companion. Complicating things is another galaxy, SDSS J03201.11+291311.9. This is the blue blob just left and slightly up from the blue E0 galaxy. To me, it looks like just the end of the mostly detached spiral arm but it is classed as a separate galaxy, not as part of a galaxy like I'd expect. I also found it referred to as a separate galaxy one reference. It has no classification.
Related Designation(s):2MASS J08315765+1912412, 2MASX J08315766+1912411, 2MASXi J0831578+191244, ARP 058, ARP058, ASK 585941.0, CGCG 0829.1+1923, CGCG 089-040, IRAS 08290+1922, IRAS F08291+1922, MCG +03-22-017, NSA 105205, PGC 023935, SDSS J083157.64+191241.4, SDSS J083157.65+191241.4, SDSS J083157.65+191241.5, UGC 04457, UZC J083157.7+191241, VV 413, [RC2] A0829+19A, [TTL2012] 389286,