Object name: ARP027
Arp 27/NGC 3631 is a grand design spiral in Ursa Major. Redshift shows it to be about 62 million light-years distant. A Tully-Fisher measurement says 70 million light-years. Pretty good agreement as these things go. Arp puts this one in his category of spiral galaxies with one heavy arm. NED classes it as SA(s)c. At magnitude 10.6 this is a good one for visual observers. Arp's comment on this one reads: "Note straight arm, absorption tube crossing from inside to outside of south arm." The straight arm he refers to is easy to spot. The absorption tube is likely the dark feature from upper left to lower right crossing the narrow arm. A narrow line of star clusters continues on what would be the upper side if it continued further southwest. 3 clouds might be along the lower side of it.
Related Designation(s):2MASS J11210288+5310104, 2MASX J11210294+5310099, 87GB 111816.0+532550, 87GB[BWE91] 1118+5326, ARP 027, ARP027, CGCG 1118.2+5327, CGCG 268-021, GB6 J1121+5310, HDCE 0651 NED001, HIJASS J1120+53, IRAS 11181+5326, IRAS F11182+5326, LDCE 0867 NED014, LGG 241:[G93] 001, MCG +09-19-047, NGC 3631, NSA 159653, NVSS J112103+531011, PGC 034767, SDSS J112102.87+531010.4, UGC 06360, UMa Cluster:[PRL2014] U002, UNAM-KIAS 0691, UZC J112102.9+531010, VV 363, [BEC2010] HRS 048, [M98j] 125 NED01, [WB92] 1117+5321 NED02,