Secular acceleration of Earth's rotation from Chinese records of lunar occultation of stars before 600 A.D.

Details Secular acceleration of Earth's rotation from Chinese records of lunar occultation of stars before 600 A.D. Secular acceleration of Earth's rotation from Chinese records of lunar occultation of stars before 600 A.D.

Jun 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988cha%26a..12..169l&link_type=abstract

Chinese Astronomy and Astrophysics, Volume 12, Issue 2, p. 169-178.

Astronomy and Astrophysics

Astrophysics

1

Scientific paper

By applying the method of ``Visible Time Interval'' to early Chinese records before 600 A.D. of lunar occultation of stars, a mean value for the secular acceleration of Earth's rotation ω has been obtained for the first time from these records where the hour of occultation is not stated. From 83 carefully selected records, I found ω = -49.7 +/- 4.2 s/century2. The adopted lunar tidal acceleration for the calculation was n = -22.44''/century2. Stability of the solution is discussed.

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