Possible Supernova PSN J05212593-1652559 in PGC 17166 Narrowfield L - Oct 17

Possible Supernova PSN J05212593-1652559 in PGC 17166 Narrowfield L - Oct 17, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
Sn seen south-south-east of the nucleus at Mag 17.6 L
DISCOVERY
Catalina Real-Time Transient Survey: 2012.10.15.420; Mag 18.0
TECHNICAL INFORMATION
Total exposure 90 min (6 x 15 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2012.10.17.418
Astrometry: RA 05 21 26.09 Dec 16 52 58.9
Photometry: 17.58 +/- 0.04 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.