恒星月
- 网络A sidereal month;mês sideral
恒星月-
它的周期约半个恒星月，振幅约3km和3ms~（-1）。
Its period is about half sidereal month , and amplitudes are about 3 km and 3 ms ~ ( - 1 ) .
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文章分析了月球在一个恒星月内位置变化与相应的地月转移轨道升交点赤经和近地点幅角变化的关系，在这个基础上讨论了发射机会和发射窗口问题。
The relation of the right ascension and argument of perigee of the required orbit with the lunar position is derived within one lunar month . Based on this relationship the launch opportunity and launch window are discussed .