… The orbital period T of an elliptical orbit (including a circular orbit) is given by, and this period, which corresponds to the first cosmic velocity, is about 84 minutes. In particular, a circular orbit with a period T of 1 day is called a geosynchronous orbit, and among them, an orbit with an inclination of 0 degrees is usually called a geostationary orbit (Figure 2). In this way, satellite orbits are classified into circular orbits, (long) elliptical orbits, parabolic orbits, and hyperbolic orbits based on their shape, and are also called low-altitude orbits, geostationary orbits, etc. depending on the altitude and period of the orbit. … *Some of the terminology explanations that mention "geosynchronous orbit" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 楕円軌道(円軌道を含む)の軌道周期Tは,で与えられ,第一宇宙速度に対応するこの周期は約84分である。とくに周期Tが1日の円軌道を地球同期軌道geosynchronous orbitといい,その中で,軌道傾斜角0度の軌道を通常,静止軌道と呼んでいる(図2)。 人工衛星の軌道はこのように,その形状から,円軌道,(長)楕円軌道,放物線軌道,双曲線軌道に分類されるほか,軌道の高度や周期により,低高度軌道,静止軌道などと呼ばれることもある。… ※「geosynchronous orbit」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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