同步卫星:其公转轨道中央星自转的周期与方向均相同的卫星
其与星球之间引力与卫星向心力相等

其速度

特例:
静止同步卫星:当同步卫星的轨道倾角为零时,卫星能被垂直投影在中央星的一个固定点上。

参见

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