Object name: ARP073
Designation(s): ARP073, IC1221,
Arp 73 is a pair of galaxies in Northern Hercules at about 415 million light-years. It falls under Arp's class "Spiral Galaxies with Companions on Arms: Small, high surface brightness companions." Their general catalog names are IC 1222 and SDSS J163514.15+461232.6 right to left. IC 1222 is classed by NED as SAB(s)c. Arp's comment: "Arm leads toward, but not up to companion." In my image it looks like the arm does pass by the companion and overlaps the tidal arm toward IC 1222. That seems in conflict with Arp's comment unless he was talking only about the core of the companion. I find no classification of the companion. It reminds me of M110 and its tidal arms due to M31 though the arms of M110 are fainter. NGC 1222 was discovered by Lewis Swift on July 10, 1890 as was IC 1221 discussed below.
Related Designation(s):2MASS J16344160+4623315, 2MASS J16350919+4612500, 2MASX J16344160+4623319, 2MASX J16350921+4612500, 2MASX J16351005+4612572, 2MASXi J1634416+462331, 2MASXi J1635092+461249, ARP 073, ARP073, CGCG 1633.2+4630, CGCG 1633.6+4619, CGCG 251-030, CGCG 251-031, IC 1221, IC 1222, IC1221, IRAS 16336+4618, IRAS F16336+4618, KPG 500A, KPG 500B, LCSB L0685O, MCG +08-30-030, MCG +08-30-032, NSA 147133, NSA 147135, NVSS J163509+461252, PGC 058528, PGC 058544, SDSS J163441.61+462331.5, SDSS J163441.62+462331.4, SDSS J163509.18+461250.1, SDSS J163509.19+461250.0, UGC 10458, UGC 10461, UZC J163441.7+462331, UZC J163509.2+461251, [PVK2003] J248.67333+46.39222 , [PVK2003] J248.78792+46.21417 ,