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定朔

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定朔是古代中国阴阳历中,确定每第一天(初一、)的一种计算方法,与平朔相对。这种算法的原则是,将太阳黄经黄经一致的当天作为每的初一。因此这种算法考虑了太阳运行和球运行的不均等性,将含有真正新月(“朔”)的当天作为每月的开始。古六曆至隋大業曆平氣平朔。唐戊寅元暦採平氣定朔後因連四大月改回平朔,麟德曆用進朔避連四大月。元授時曆棄進朔採定朔,至明大統曆大致採平氣定朔。清時憲曆(於順治二年頒行)後採定氣定朔。[1]

历法中导入定朔法,南北朝劉宋何承天北齐劉孝孫劉焯等均提出了建议,但一直未被采纳,直到戊寅元暦才首次被采用。

参见

[编辑]
  1. ^ 王广超:明清之际定气注历之转变
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定朔
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