A supermoon is the coincidence of a full moon or a new moon with the closest approach the Moon makes to the Earth on its elliptical orbit, resulting in the largest apparent size of the lunar disk as seen from Earth.[1] The technical name is the perigee-syzygy of the Earth-Moon-Sun system.
- For any satellite of Earth including the Moon the point of least distance is the perigee(/ˈpɛrᵻdʒiː/) and greatest distance the apogee.