メトン周期簡易計算

19年ごとに月齢が同じになるという法則。メトン周期を単純計算します(Metonic cycle)
AD年(YY) 月(MM) 日(DD)
-57 1931/8/31(MON) MOONAGE17.4(Aries 9')
-38 1950/8/31(THU) MOONAGE18.1(Aries18')
-19 1969/8/31(SUN) MOONAGE18.7(Aries25')
Start Date 1988/8/31(WED) MOONAGE18.9(Aries29')
+19 2007/8/31(FRI) MOONAGE17.7(Aries13')
+38 2026/8/31(MON) MOONAGE17.7(Aries13')
-57 2045/8/31(THU) MOONAGE17.9(Aries17')

メトン周期簡易計算ver1.0
since Sep4.2020
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