#point_of_periapsis__periapsis__periapsi  (astronomy) the point in as orbit closest to the body being orbited
  exclusion:  point_of_apoapsis
  supertype:  celestial_point  a point in the heavens (on the celestial sphere)
  subtype:  perigee  perihelion  perijove  periselene
  part of:  celestial_orbit__celestialorbit__orbit  the (usually elliptical) path described by one celestial body in its revolution about another; "he plotted the orbit of the moon"

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