perigee(redirected from Perigeum)
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Related to Perigeum: Apogeum
1. Astronomy The point in an orbit around the planet Earth where the orbiting body is closest to the planet.
2. The analogous point in an orbit around a celestial body other than Earth. Not in technical use.
[French périgée, from Medieval Latin perigēum, from Late Greek perigeion : Greek peri-, peri- + Greek gē, earth.]
per′i·ge′al (-jē′əl), per′i·ge′an (-jē′ən) adj.
(Astronomy) the point in its orbit around the earth when the moon or an artificial satellite is nearest the earth. Compare apogee1
[C16: via French from Greek perigeion, from peri- + gea earth]
ˌperiˈgean, ˌperiˈgeal adj
the point in the orbit of a heavenly body, esp. the moon, or of an artificial satellite at which it is nearest to the earth. See illus. at apogee.
[1585–95; < French perigée < New Latin perigēum, perigaeum < Greek perígeion (sēmeîon limit), neuter of perígeios near, of the earth]
per`i•ge′al, per`i•ge′an, adj.
1. The point nearest Earth's center in the orbit of the moon or an artificial satellite.
2. The point in the orbit of a body, such as a satellite, where it is nearest the body around which it revolves, such as a planet. Compare apogee.
the closest point in an orbit to the body being orbited.See also: Planets
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|Noun||1.||perigee - periapsis in Earth orbit; the point in its orbit where a satellite is nearest to the Earth|
apogee - apoapsis in Earth orbit; the point in its orbit where a satellite is at the greatest distance from the Earth