Keywords: Occultation, Moon, and Timing

Abstract: One of the important type of occultation with the moon is called grazing occultation. The causes of this phenomenon are the lunar mountains and edge features. In the past few years, the scientific values of grazing occultation have changed. Even a visual observation with the precision of 0.5 second, would lead to very precise information about the moon edge features. More precise information about the exact lunar edge would lead to better determination of the star’s positions. Understanding the precise structure of the moon edge, which is detectable during a solar eclipse, has still a great significance. For instance, for measuring the variation in sun diameter by using the observation of Bailey’s beads.

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