A Check on the Variations of Earth's Rotation with an Ancient Solar Eclipse  

作　　者：Yan-Ben Han and Qi-Yuan Qiao National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012 

出　　处：《Chinese Journal of Astronomy and Astrophysics》2003年第6期569-575,共7页中国天文和天体物理学报（英文版）

基　　金：Supported by the National Natural Science Foundation of China

摘　　要：We address the relation between an ancient total eclipse, which occurred on A.D.1542 August 11 and the variation of Earth's rotation. The total eclipse was recorded in some ancient Chinese books, especially in local chronicles. Some of the documents include useful information for determining the location of the totality zone. The parameters of the eclipse are calculated by using the DE406 Ephemeris. A high-precision value of ΔT which expresses the variation of the Earth's rotation, of about 300 ~ 380 s, is obtained.We address the relation between an ancient total eclipse, which occurred on A.D.1542 August 11 and the variation of Earth's rotation. The total eclipse was recorded in some ancient Chinese books, especially in local chronicles. Some of the documents include useful information for determining the location of the totality zone. The parameters of the eclipse are calculated by using the DE406 Ephemeris. A high-precision value of ΔT which expresses the variation of the Earth's rotation, of about 300 ~ 380 s, is obtained.

关 键 词：solar eclipse earth rotation 

分 类 号：P182[天文地球—天文学]