Množina: perigees

ETYM New Lat. perigeum, from Greek peri about, near + gea the earth: cf. French périgée.
Periapsis in Earth orbit; the point in its orbit where a satellite is nearest to the Earth.
Point in orbit nearest earth.
The point at which an object, traveling in an elliptical orbit around the Earth, is at its closest to the Earth. The point at which it is furthest from the Earth is the apogee.