The comet C/2011 L4 PANSTARRS has moved way up north. It was roughly half way up between Shedir and Caph (the two "right-most" stars in Cassiopeia's W-shape) on the last night of astronomical darkness of the 2012-2013 imaging season. The moon-lit astronomical darkness lasted for a whopping 14 minutes, the next few dark minutes are due in late August.
Due to it's northern position and the poor visibility north, I was able to image this only for half an hour in the waxing twilight before the comet was obscured by trees. With an hour more I might have been able to get a bit better stars on the background as the comet would have moved further during the stack.
LRGB 9x 1 minute per channel, double stacked (comet + stars).