The moon will reach full phase Tuesday. But as far as full moons go, it wont be the most impressive. In fact, it will be the smallest full moon of the year.
About 13 hours after its officially full, the moon will arrive at the point in its orbit farthest from Earth (called apogee), a distance of 252,518 miles (406,389 km). The moons apparent angular size that night will be at a minimum in 2010.
Though the casual viewer may not notice the difference, the Aug. 24 moon will appear 12.3 percent smaller than the full moon of Jan. 30, which nearly coincided with perigee the moons closest point in its orbit relative to Earth. [ Moon Mechanics ]