BERKELEY HEIGHTS, NJ - The "Extra-Supermoon" will apparently be bigger and brighter than ever! The Full Moon that appears on the evening of Sunday, Aug. 10 will appear to observers to be the largest and brightest full moon of 2014.
The Moon will be about 221,765 miles away, which is as close to the Earch as it gets in its elliptical orbit around our planet.
This closest approach is called perigee, and will make the apparent size of the Moon look very much larger than normal. In fact, the Moon will appear 16 percent larger and 30 percent brighter than usual. We only apparently see a larger Moon because it is closer to the Earth than it is at other times in its orbit around our planet.
This August 10 Supermoon is not that rare, occurring at least once every year. In 2014, there are three Supermoons -- July 12, Aug. 10, and Sept. 9 -- but the one on August 10 is the closest of the three, making it an Extra-Supermoon.
On Sunday, Aug. 10, 2014, the Moon reaches its closest point to Earth (perigee) about 26 minutes before the Moon becomes a Full Moon, which occurs at 2:10 p.m. EDT (eastern daylight time).
The National Geographic article Catch the Extra-Supermoon This Weekend
states, “While this neat convergence will make this an extra-supermoon, don’t be surprised if you can’t spot the difference from other full moons you might have gazed at in past months.”