摘要
本文对中国正史记载的八世纪前的34次纪时日食观测作了分析,指出其中两次日食记载有重复,另一次纪日不确,对32次日食观测记录的14个食分和45个见食时刻作了考查,其中除一次食甚时刻误差较大(约1h)外,余皆准确可靠,本文据此对地球自转速率的长期变化趋势作了探讨。
timing solar eclipse observations recorded in The Twenty-Four Histories during the period from BC 2nd to AD 8th Century are analysed in this paper. Among them two solar eclipses were recorded twice respectively, and the date of another one is incorrect. Out of all the 32 solar eclipse observations 14 magnitudes of eclipse and 45 times of phase of eclipse are examined. The results are as follows: all times were recorded correctly except the only one, No.35, whose error is about one hour.According to these observations the authors probe into the tendency of the secular changes in the rotation of the earth.
出处
《天文学报》
CSCD
北大核心
1995年第3期314-320,共7页
Acta Astronomica Sinica