Perigee Moon
This just in from Spaceweather.com:
FULL MOON ALERT! This weekend's full Moon is the biggest and brightest of 2009. It's a "perigee Moon" as much as 50,000 km closer to Earth than other full Moons we'll see later this year. Perigee moonlight shining through icy winter air can produce beautiful halos, coronas, moondogs and other atmospheric optics phenomena. Sample photos are featured on today's [9 December 2009, if you need to access the archives] edition of Spaceweather.com.
This moon's size and brilliance will rival the perigee moon of last December, which was just about the same distance away. Science@NASA has more information: "Biggest Full Moon of the Year: Take 2".