For astronomy and calendar studies, the Metonic cycle or Enneadecaeteris (from ἐννεακαιδεκαετηρίς, `nineteen years`) is a period of very close to 19 years that is remarkable for being nearly a common multiple of the solar year and the synodic (lunar) month. The Greek astronomer Meton of Athens (fifth century BC) observed that .....
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in chronology, a period of 19 years in which there are 235 lunations, or synodic months, after which the Moon`s phases recur on the same days of the ... [3 related articles]
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A period of 19 years, after which the phases of the Moon recur on the same calendar date and within two hours of the same time. Discovered by Meton of Athens in 432 BC, it arises from the fact that 235 lunations equal 19 tropical years almost exactly – about 6939.5 days. The Metonic cycle form...
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The period of 6 939.6 days, or 19 calendar years, after which the Moon's phases recur on the same day of the year. This period is also equal to 253 lunations.
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Every 190 tropical years (or 235 synodic months) from the precise date of a full/new Moon, another full/new Moon occurs at approximately the same degree of the ecliptic and about the same date The ancient Greeks called 19 the golden number as the same lunar phase repeats on the same date every 190 years
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The metonic cycle or metonic year is the cycle of the moon, or period of nineteen years, in which the lunations of the moon return to the same days of the month. The metonic cycle was discovered by Meton, an Athenian mathematician who lived around 432 BC.
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