Object name: NGC6801
Designation(s): NGC6801, SN2015af,
NGC 6801 is a rather odd spiral in northeastern Cygnus. NED classifies it as SAcd, The NGC Project says Sc while Seligman says Sc?. Note how two arms curve out of the core to the south then turn and go straight to the edge of the galaxy. The northern one seems to suddenly turn north and sort of follow the edge of the galaxy but again in a straight line. I think this more an illusion due to a small field star in our galaxy and a star knot in the arm defining a line that isn't there. But the part coming out to the edge certainly is straight. Arp had a classification for spirals with a heavy arm. Often this was straight as in the most famous example, M101. In fact, the one in M101 does go out straight then bend at about a 75 degree angle and continue on straight until it again bends at about 60 degrees and continues on straight yet again. These two arms aren't heavy but they sure are straight.
Related Designation(s):2MASS J19273587+5422225, 2MASX J19273579+5422224, AKARI J1927359+542225, CGCG 1926.5+5416, CGCG 281-003, IRAS 19264+5416, IRAS F19264+5416, ISOSS J19276+5422, MCG +09-32-005, NGC 6801, NGC6801, NVSS J192736+542226, PGC 063229, SN2015af, UGC 11443, UZC J192735.9+542222, [SLK2004] 1556,