Object name: M101
Designation(s): M101, ARP26, NGC5457,
Arp 26, more famously known as M101 made Arp's atlas under the category of spiral galaxies with one heavy arm. Located in Ursa Major its distance is rather uncertain. An average of many comes to about 20 million light-years. Arp's comment on this entry reads "Note straight arm, bright knot on east appears almost stellar." I took this image while supernova SN 2011fe was near maximum brightness. It is marked at the bottom of my image between tick marks. M101 is classified as SAB(rs)cd HII by NED, SBc by the NGC Project and SAB(rs)cd? by Seligman. While recorded in Messier's list it was actually discovered by his close friend Pierre Méchain on March 27, 1781.
Related Designation(s):11HUGS 363, 2MASS J14031253+5420560, 6C B140129.2+543437, AKARI J1403130+542102, ARP 026, ARP26, CGCG 1401.5+5435, CGCG 272-021, CXO J140312.5+542056, CXO J140312.54+542056.2, CXOU J140312.5+542053, HDCE 0853 NED001, IRAS 14013+5435, IRAS F14012+5434, KIG 0610, LDCE 0842 NED010, LGG 371:[G93] 001, M101, MCG +09-23-028, MESSIER 101, MESSIER 101:[JRW2004] XMM-10 , MESSIER 101:[JRW2005] 051, MESSIER 101:[PSM2001] 040, MESSIER 101:[WIP99] H23, MESSIER 101:[WIP99] P16, MESSIER 102, NGC 5457, NGC 5457:[L2011a] X0019, NGC 5457:[LB2005] X01, NGC 5457:[MGS2012] 001, NGC 5457:[RPS97] 06, NGC 5457:[RW2000] X-11, NGC5457, NSA 053000, PGC 050063, SDSS J140312.52+542056.2, SDSS J140312.54+542056.1, UGC 08981, UZC J140312.5+542056, VV 344a, VV 456, XMMU J140312.4+542056, [M98j] 170 NED77, [SPB93] 243, [WB92] 1401+5434,