is the first full moon after the harvest moon, which is the full moon nearest the autumnal equinox.
Tonight's moon will be the smallest, farthest full moon of 2011. It lies more than 252,000 miles away, in contrast to the moon’s average distance of about 239,000 miles.
http://earthsky.org/tonight/october-full-moon-is-smallest-full-moon-in-2011