Possible Supernova PSN J21215870-1351224 in USNOA2 0750-20769751 Narrowfield IR - June 6

Possible Supernova PSN J21215870-1351224 in USNOA2 0750-20769751 Narrowfield IR - June 6, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
SN not detected. Faded since May 16.
Discovery
Catalina Real-Time Transient Survey: 2012.5.14.740; Mag 18.3
TECHNICAL INFORMATION
Total exposure 135 min (9 x 15 min, infrared filter > 700 nm; binned 2x2, scale 1.01 asec/px)
Time: 2012.6.6.690
Astrometry: Discovery position marked
Photometry: Not done
These data were collected by Joseph Brimacombe using a 41-cm
RCOS and STL6K camera at Coral Towers Observatory, Cairns, Australia.