Japanese astronomer Koichi Itagaki on May 18 2023 discovered supernova in the Galaxy M101 Pinwheel. Supernova was designated with name SN 2023ixf and it is about 21 million light years distant.
Galaxy Messier 101 is well known to the amateur astronomers and it’s easy to find it close to the handle of Big Dipper. Now it’s passing every evening local meridian about 10 degrees North of Zenith.
Screen capture images above are from stellarium-web.org and M101 is passing meridian every evening 4 minutes sooner.
Astronomer Robert Fealey published his picture of the M101 with supernova on May 28th at forum.