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

Yan-Ben Han, Qi-Yuan Qiao

Abstract


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.

Keywords


solar eclipse --- Earth rotation

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Print ISSN: 1674-4527

Online ISSN: 2397-6209