| 八世纪前中国纪时日食观测和地球转速变化 |
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| 引用本文： | 张培瑜,韩延本.八世纪前中国纪时日食观测和地球转速变化[J].天文学报,1995,36(3):314-320. |
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| 作者姓名： | 张培瑜 韩延本 |
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| 作者单位： | 中国科学院紫金山天文台，中国科学院北京天文台 |
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| 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１＾ｈ）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。
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| 关 键 词： | 纪时日食 地球自转 日食 公元八世纪前 中国 |
THE TIMING SOLAR ECLIPSES RECORDED IN CHINA AND THE SECULAR CHANGES IN THE EARTH'S ROTATION BEFORE THE 8TH CENTURY |
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| Zhang Pei-yu.THE TIMING SOLAR ECLIPSES RECORDED IN CHINA AND THE SECULAR CHANGES IN THE EARTH''S ROTATION BEFORE THE 8TH CENTURY[J].Acta Astronomica Sinica,1995,36(3):314-320. |
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| Authors: | Zhang Pei-yu |
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| Abstract: | 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. |
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| Keywords: | Timing solar eclipse Earth's Rotation |
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