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 1845/1/21(TUE) MOONAGE12.5(Cancer 3')
-38 1864/1/21(THU) MOONAGE12.2(Gemini29')
-19 1883/1/21(SUN) MOONAGE12.6(Cancer 4')
Start Date 1902/1/21(TUE) MOONAGE11.5(Gemini21')
+19 1921/1/21(FRI) MOONAGE11.4(Gemini20')
+38 1940/1/21(SUN) MOONAGE10.5(Gemini 9')
-57 1959/1/21(WED) MOONAGE11.1(Gemini16')

メトン周期簡易計算ver1.0
since Sep4.2020
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