利用月掩星现象测量月球公转周期

Measurement of moon rotation period by moon occultation

月掩星现象发生前,通过天文望远镜观测月球阴影部分可以看到月球相对于遥远的恒星的视角的变化,在较短的观测时间内遥远的恒星可以视为固定不动,通过两者的相对位置的变化加上地球自转的修正可以测量出月球公转的平均轨道周期.

Before moon occultation,the changes of the moon's angle of view relative to distant stars could be seen through telescopes,and distant stars could be treated as stationary in a relatively short period of time.The orbit period of the moon rotation could be measured by the changes of the relative position of the two and the correction of the rotation of the earth.