Metonic cycle
id:
metonic-cycle-173-7407036
title:
Metonic cycle
text:
The Metonic cycle or enneadecaeteris is a period of almost exactly 19 years after which the lunar phases recur at the same time of the year. The recurrence is not perfect, and by precise observation the Metonic cycle defined as 235 synodic months is just 2 hours, 4 minutes and 58 seconds longer than 19 tropical years. Meton of Athens, in the 5th century BC, judged the cycle to be a whole number of days, 6,940. Using these whole numbers facilitates the construction of a lunisolar calendar. A trop
brand slug:
wiki
category slug:
encyclopedia
description:
19-year pattern in lunisolar calendars
original url:
https://en.wikipedia.org/wiki/Metonic_cycle
date created:
2001-10-30T15:52:36Z
date modified:
2024-09-02T09:37:07Z
main entity:
{"identifier":"Q285682","url":"https://www.wikidata.org/entity/Q285682"}
image:
{"content_url":"https://upload.wikimedia.org/wikipedia/commons/f/fe/CLM_14456_70v71r.jpg","width":2000,"height":1546}
fields total:
13
integrity:
16