楕 円 軌 道(だえんきどう)

だえんきどう

noun

elliptical orbit

1. elliptical orbit

An orbit shaped like an ellipse, in which the orbiting body's distance from the central object varies over the course of one revolution.

月(つき)は楕円軌道(だえんきどう)を描(えが)く。

The moon traces an elliptical orbit.

地球(ちきゅう)は太陽(たいよう)の周(まわ)りを楕円軌道(だえんきどう)で回(まわ)る。

The Earth moves around the sun in an elliptical orbit.

多(おお)くの惑星(わくせい)は完全(かんぜん)な円(えん)ではなく楕円軌道(だえんきどう)を持(も)つ。

Most planets have elliptical orbits rather than perfect circles.

Usage: 楕円軌道(だえんきどう) is an elliptical (oval) orbit, in which the orbiting body's speed and distance vary. It combines 楕円(だえん) (ellipse) with 軌道(きどう) (orbit).

Common collocations

楕円軌道(だえんきどう)を描(えが)く: to trace an elliptical orbit
楕円軌道(だえんきどう)を回(まわ)る: to move in an elliptical orbit

Similar words

円軌道(えんきどう): circular orbit — constant distance from the center
静止軌道(せいしきどう): geostationary orbit

Related Words

Related: 軌道(きどう) (orbit; trajectory)

Compare: 静止軌道(せいしきどう) (geostationary orbit)

general

Added 2026.7.2 3:18 · Revised 2026.9.2 13:02

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