日食所致“天再旦”现象再研究  

Restudy of the“Double Dawn”Phenomenon Caused by Solar Eclipse

作　　者：王圣豪 WANG Sheng-hao(School of History,Beijing Normal University,Beijing 100091)

机构地区：[1]北京师范大学历史学院,北京100091

出　　处：《天文学报》2024年第5期131-140,共10页Acta Astronomica Sinica

摘　　要：古书《竹书纪年》记载周懿王元年“天再旦于郑”,这被现代学者认为可能是发生在日出之际的日食,夏商周断代工程选择前899年4月21日的日环食为天再旦的对应日食.更一般的分析发现只有食分在0.95以上的日食才能产生“天再旦”现象,对食甚时的太阳高度也有限制.在确定“郑”位于陕西凤翔县的前提下,前899年日食和断代工程实测的1997年日食的日光变化情况可以通过天文软件模拟,这确认了“天再旦”现象的普遍存在,从中也可得出“天再旦”现象发生时的具体过程并还原部分细节.According to an ancient document Bamboo Annals,the day dawned twice(“double dawn”)in Zheng(郑)during the first year of King Yi of Zhou(周懿王),and it has been regarded as a solar eclipse happening around sunrise by modern scholars.The annular eclipse on April 21th,899BC is chosen as the candidate of“double dawn”eclipse by the Xia-Shang-Zhou Chronology Project.Besides,the more general researches confirm that only eclipses with magnitude more than 0.95 can cause the phenomenon“double dawn”,and the altitudes of sun during eclipse are constrained as well.After defining“Zheng”in Fengxiang county,Shaanxi,we use astronomical software to imitate the solar brightness change during the 899BC eclipse and the 1997 eclipse,which was observed by the Chronology project.As a result,we confirm that the“double dawn”is a general phenomenon,derive the specific process and some particulars of the“double dawn”eclipses.

关 键 词：日食 天体力学 天文学史 方法:观测 

分 类 号：P125[天文地球—天体测量]