To our own eyes, the differences are indistinguishable. These differences are thanks to the small differences in the Moon’s distance from the Sun. An average apogean full moon is 0.99967.An average distance of the full moon is 0.99981.An average perigean full moon is 0.99996.Setting the Sun’s illumination of the lunar surface during the extreme perigean full moon in November 2016 to a value of 1.00000, the illumination of the Moon at: Less than 23% larger than the average apogean full moon.About 14% compared to its appearance at its average distance from Earth.Less than 4% compared to the average perigean full moon.Seen from Earth, the area of sky covered by the extreme perigean November 2016 full moon is greater in area by: For comparison, the width of the fingernail on your smallest finger (your “pinkie”), when held at arm’s length, is about the same diameter as the full moon in the sky.Ĭould you measure any of these differences by eye? Less than 14% larger than the average apogean full moon.
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