In lunar or planetary orbits, the point in an orbit that is farthest from the Moon or other celestial body being orbited.
From Greek apo- (away, far) + Cynthia (an epithet for the Moon goddess), modeled on 'apogee.' Coined in space exploration terminology.
NASA scientists use apocynthion to calculate spacecraft orbits around the Moon—it's the 'farthest point' for any Moon mission, the lunar equivalent of apogee!
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