(CNN) -- The heavens will deliver a rare treat to moonstruck romantics and werewolves Sunday who rise before the sun. A feat of lunar synchronicity will create a Supermoon. This happens when the moon is full and at the same time reaches its perigee -- the closest point to Earth in its orbit, according to NASA. Share your 2013 Supermoon photographs It makes for the biggest, brightest moon of the year. A Supermoon, sometimes called a Super Full Moon, is 14% larger and 30% brighter than most full moons, NASA says. Taken separately, neither a full moon nor the perigee is a big deal. The moon is full roughly once a month, and it reaches its perigee just as often, but the next time both will coincide will be August 2014.
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A Supermoon occurs about once a year
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It is much larger and brighter than an average full moon
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It happens when the moon is full and the moon is at its closest point to earth
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The moon will set over some of the U.S. before reaching its closest point
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In some parts of the United States the sun will rise beforehand, outshining the @placeholder's splendor.