Copyright © Philip M. Parker, INSEAD. Terms of Use.
Definition: METONIC CYCLE |
METONIC CYCLE1. A period of 19 years, after the lapse of which the new and full moon returns to the same day of the year; -- so called from Meton, who first proposed it. |
| Domain | Definitions |
Aerospace | A period of 19 years, after which the various phases of the moon fall on approximately the same days of the year as in the previous cycle.The Metonic cycle is the basis for the golden numbers used to determine the data of Easter. Four such cycles form a Callippic cycle. (references) |
Literature | Metonic Cycle (The). A cycle of nineteen years, at the end of which period the new moons fall on the same days of the year, and eclipses recur. Discovered by Meton, B.C. 432. Source: Brewer's Dictionary. |
Source: compiled by the editor from various references; see credits. | |
(From Wikipedia, the free Encyclopedia)
The Metonic cycle in astronomy and calendar studies is an approximate common multiple of the orbital periods of the Earth and the Moon. 19 tropical years differ from 235 synodic months by just about 2 hours.
This approximation is used by the Hebrew calendar. It was known to the Greek astronomer Meton, who introduced it about 432 BC, and the Chaldean astronomer Kidinnu (4th cy. BC). It is also used in the computation of the date of Easter.
In a typical lunisolar calendar, most years are lunar years of 12 months, but in 7 of the 19 years have an extra month, known as an intercalary or embolismic month. Traditionally (in the ancient Babylonian and Hebrew calendars), the years: 3, 6, 8, 11, 14, 17, and 19, are the long (13-month) years of the Metonic cycle. This incorporates two less accurate subcycles, for which 8 years = 99 lunations (an Octaeteris), and 11 years = 135 lunations.
The 19-year cycle is also close (to somewhat more than half a day) to 255 draconic months, so it also is an eclipse cycle, which lasts only for about 4 or 5 recurrences of eclipses. The implicit 11-year cycle is close to 146.5 draconic months, and is a better eclipse cycle called tritos.
Source: adapted by the editor from Wikipedia, the free encyclopedia under a copyleft GNU Free Documentation License (GFDL) from the article "Metonic cycle."
Crosswords: METONIC CYCLE |
| English words defined with "METONIC CYCLE": Calippic cycle, Calippic period ♦ Golden number ♦ Lunar cycle. (references) |
| Specialty definitions using "METONIC CYCLE": Callippic Period. (references) |
| Language | Translations for "METONIC CYCLE"; alternative meanings/domain in parentheses. | |
Turkish | ay çevrimi. (various references) | |
| Source: compiled by the editor from various translation references. | ||
Scrabble® Enable2K-Verified Anagrams | |
| Words within the letters "c-c-c-e-e-i-l-m-n-o-t-y" | |
-4 letters: clemency, cyclonic, eclectic, election, elenctic, encyclic, mylonite. | |
-5 letters: centile, centime, centimo, cineole, clement, cometic, conceit, cyclone, lection, licence, licente, mycotic, myeline, onetime, telomic, tonemic. | |
| Source: compiled by the editor from various references; see credits. SCRABBLE® is a registered trademark. All intellectual property rights in and to the game are owned in the U.S.A and Canada by Hasbro Inc., and throughout the rest of the world by J.W. Spear & Sons Limited of Maidenhead, Berkshire, England, a subsidiary of Mattel Inc. Mattel and Spear are not affiliated with Hasbro. | |
Hexadecimal (or equivalents, 770AD-1900s) (references)4D 45 54 4F 4E 49 43 43 59 43 4C 45 |
| Leonardo da Vinci (1452-1519; backwards) (references)
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Binary Code (1918-1938, probably earlier) (references)01001101 01000101 01010100 01001111 01001110 01001001 01000011 00100000 01000011 01011001 01000011 01001100 01000101 |
HTML Code (1990) (references)M E T O N I C   C Y C L E |
ISO 10646 (1991-1993) (references)004D 0045 0054 004F 004E 0049 0043 0043 0059 0043 004C 0045 |
Encryption (beginner's substitution cypher): (references)4739544948433723759374639 |
| 1. Definition 2. Crosswords 3. Translations: Modern 4. Anagrams | 5. Orthography 6. Bibliography |
Copyright © Philip M. Parker, INSEAD. Terms of Use.
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