A Check on the Variations of Earths

A Check on the Variations of Earths Rotation with an Ancient Solar Eclipse

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 AT which expresses the variation of the Earth's rotation,of about 300 ～ 380 s, is obtained.

作 者： Yan-Ben Han Qi-Yuan Qiao   作者单位： National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012  刊 名： 天体物理学报(英文版)  ISTIC SCI 英文刊名： CHINESE JOURNAL OF ASTRONOMY AND ASTROPHYSICS  年，卷(期)： 2003 3(6)  分类号： P14  关键词： solar eclipse - Earth rotation  

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