Possible Extragalactic Nova PNV J00423991+4126573 in M31 - July 21

Possible Extragalactic Nova PNV J00423991+4126573 in M31 - July 21, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
SUMMARY
Nova seen at Mag 18.1 L
DISCOVERY
Kamil Hornoch: 2012.7.18.988; Mag 18.0
TECHNICAL INFORMATION
Total exposure 45 min (3 x 15 min, luminance filter; binned 2x2, scale 0.91 asec/px)
Time: 2012.7.21.441
Astrometry: RA 00 42 39.94 Dec 41 26 57.1
Photometry: 18.1 +/- 0.3 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.