Perigee passage

Japanese: 近地点通過 - きんちてんつうか
Perigee passage

…On the other hand, the point farthest from the Earth's center of gravity is called the apogee. The time when the Moon or an artificial satellite passes through the perigee is called the perigee passage. If the semi-major axis of the Moon's orbit or an artificial satellite's orbit is a and the eccentricity is e , the distance between the perigee and the Earth's center of gravity is expressed as a (1 - e ). …

*Some of the terminology used to refer to "perigee passage" is listed below.

Source | Heibonsha World Encyclopedia 2nd Edition | Information

Japanese:

…逆に,地球の重心からもっとも離れた地点を遠地点と呼ぶ。月や人工衛星が近地点を通過する時刻を近地点通過と呼ぶ。月や人工衛星の軌道半長径をa,離心率をeとすれば,近地点と地球の重心との距離は,a(1-e)で表される。…

※「近地点通過」について言及している用語解説の一部を掲載しています。

出典|株式会社平凡社世界大百科事典 第2版について | 情報

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