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The full Moon on 6 January occurs 34 hours and 11 minutes from lunar apogee, the point in the Moon's orbit when it is furthest from Earth. The opposite position is lunar perigee, when the Moon is closest to Earth. Having an elliptical orbit around the Earth-Moon centre of mass (barycentre) means the Moon passes through apogee and perigee once every lunar month.
Apogee and perigee aren't that big a deal astronomically, but when full Moon occurs close to
