Analysis of Two Impacts of 1993e with Jupiter

It is the frst predicted great crash in human history that Comet Shoemaker—Levy 9 crashes into Jupiter.So many observation reports rapidly pass through all over the world by newspaper and communication lines.Through analysis of the impacts of cometary fragment H and L, some problems, like physical process of impact and determination of collisional time, have been discussed in this paper.This is meaningful for analysis and improvement of the impact prediction.As well as for researching variations of the impact sites.