Astronomy and Astrophysics – Astronomy
Scientific paper
Oct 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005acasn..46..474l&link_type=abstract
Acta Astronomica Sinica, vol. 46, no. 4, p. 474-484
Astronomy and Astrophysics
Astronomy
1
Earth'S Rotation Shoushi Liyi (An Ancient Treatise For Reviewing Shoushi Calendar), Ephemeris
Scientific paper
Shoushi Liyi, an ancient treatise for reviewing Shoushi calendar in Yuan dynasty of China, recorded the parameters and comparing results for new moon calculation of 44 ancient Chinese calendars. By investigating their computing methods of these calendars, it has 1) recovered the values of mean new moon in their initial executing years and in this lunar month the winter solstice should be included; 2) modified the errors existed in ancient records; 3) derived the theoretical values of mean new moon from the Meeus method in order to obtain the accuracy of calendar's calculation for mean new moon; 4) attempted to apply these data to study the secular variation of Earth's rotation and educed the change rate of LOD (length of day) is 1.8ms/cy.
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