Possible Supernova PSN J07561483+4402050 in PGC 22233 Narrowfield L - May 20

Possible Supernova PSN J07561483+4402050 in PGC 22233 Narrowfield L - May 20, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN seen south of the nucleus at Mag 17.0 L
TECHNICAL INFORMATION
Total exposure 50 min (5 x 15 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2012.5.20.179
Astrometry: RA 07 56 14.82 Dec 44 02 04.3
Photometry: 17.0 +/- 0.2 L
These data were collected remotely using a 51-cm
RCOS and STL11K camera at New Mexico Skies, Mayhill, New
Mexico by Joseph Brimacombe, Coral Towers Observatory,
Cairns, Australia.