http://spaceweather.com/Comet Pan-STARRS might have brightened even more than expected when it swung past the sun on March 10th. Updated light curves show the comet peaked at 0th magnitude, about 2.5 times brighter than a 1st-magnitude star. Unfortunately, bright twilight surrounds the comet, making it difficult to find. Last night, Chris Cook pointed it out to his son from a sand dune in Cape Cod, Massachusetts,:
Photo details: 2 sec exposure, Canon 5D w/70-200mm f/2.8L lens, ISO1250
Even staring straight at it, however, father and son had trouble seeing the comet. Cook used a 2-second exposure with his digital camera to improve the view.
The situation will improve in the nights ahead as Comet Pan-STARRS moves away from the sun into darker skies. Soon, it might be possible to walk outside after nightfall, look west, and see the brightening comet with the unaided eye. If you would like to try tonight, look for Comet Pan-STARRS directly underneath the waxing crescent Moon: