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 1911/8/14(MON) MOONAGE18.6(Aries 7')
-38 1930/8/14(THU) MOONAGE18.9(Aries11')
-19 1949/8/14(SUN) MOONAGE19.6(Aries20')
Start Date 1968/8/14(WED) MOONAGE20.3(Aries29')
+19 1987/8/14(FRI) MOONAGE19.9(Aries24')
+38 2006/8/14(MON) MOONAGE20(Aries25')
-57 2025/8/14(THU) MOONAGE19.8(Aries23')

メトン周期簡易計算ver1.0
since Sep4.2020
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