Comet PANSTARRS C/2011 L4, over the Chiricahua Mountains, in Arizona, but seen from New Mexico, from a site on Highway 80 north of the Painted Pony Resort. A 1.6s exposure at f/2.8 and ISO 400 in bright twilight, with the Canon 60Da at ISO 100. Part of a 140-frame time-lapse sequence.
The Amazing Sky 