Possible Supernova PSN J12271283+0925132 in NGC 4424 Narrowfield L - May 18

Possible Supernova PSN J12271283+0925132 in NGC 4424 Narrowfield L - May 18, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN seen east of the nucleus at Mag 14.9 L
TECHNICAL INFORMATION
Total exposure 60 min (4 x 15 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2012.5.18.332
Astrometry: RA 12 27 12.84 Dec 09 25 13.1
Photometry: 14.9 +/- 0.1 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.