A 22 degree halo around the moon, formed by ice crystals in a thin layer of cloud. Note stars at top left. Exposure 4 seconds, 400ASA Canon Coolpix p530 at f. 3.0. 2 December 2014 320.32 GMT, roughly 53 degrees N, 1 degree W, UK Midlands. The halo was clearly visible for at least half an hour.