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元嘉历

元嘉历》是中国古代历法南北朝时代刘宋天文学者何承天编纂,属于阴阳历宋文帝元嘉二十二年(445年)施行。梁武帝天监九年(510年),被《大明历》取代。

前虽有玄始历十九年七闰法,元嘉历仍采十九年七闰法[1]。1太阳年=日[2](≒365.2467日),1朔望月=日(≒29.530585日)。元嘉历以寅月(正月)为岁首,寅月中气雨水为气首;历元在正月朔旦夜半雨水时刻。何承天提出定朔法,使日月食发生在[3];遭太史令钱乐之和兼丞严粲、员外散骑郞皮延宗等反对,未被采纳。

日本通过百济,引入《元嘉历》。

文内注释

[编辑]
  1. ^ 刘洪涛. 2003-2. 古代历法计算法. p241
  2. ^ s:宋书/卷13
  3. ^ s:宋书/卷12 每月朔望及弦,皆定大小余
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元嘉历
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