Supernova SN 2011dh plus possible Supernova in M51 Narrowfield L - March 15

Supernova SN 2011dh plus possible Supernova in M51 Narrowfield L - March 15, a photo by Joseph Brimacombe on Flickr.

Via Flickr:
Technical information:
Total exposure 45 min (3 x 15 min, luminance filter; binned 2x2, scale 0.91 asec/px)
SN 2011dh seen; PSN not seen
Time: 2012.3.15.361
Astrometry: SN 2011dh RA 13 30 05.1 Dec 47 10 11.5; PSN Discovery position marked
Photometry: SN 2011dh 18.6 +/- 0.1 L; PSN not done
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.