Conversion number between year (Gregorian) [a, y, or yr] and Metonic cycle; enneadecaeteris is 0.052628602305476. This means, that year (Gregorian) is smaller unit than Metonic cycle; enneadecaeteris.
Switch to reverse conversion:
from Metonic cycle; enneadecaeteris to year (Gregorian) conversion
| [a, y, or yr] |
Result in Metonic cycle; enneadecaeteris
?If conversion between year (Gregorian) to second and second to Metonic cycle; enneadecaeteris is exactly definied, high precision conversion from year (Gregorian) to Metonic cycle; enneadecaeteris is enabled.
Decimal places: (0-800)
year (Gregorian)| Start value: | [year (Gregorian)] |
| Step size | [year (Gregorian)] |
| How many lines? | (max 100) |
| year (Gregorian) | Metonic cycle; enneadecaeteris |
|---|---|
| 0 | 0 |
| 10 | 0.52628602305476 |
| 20 | 1.0525720461095 |
| 30 | 1.5788580691643 |
| 40 | 2.105144092219 |
| 50 | 2.6314301152738 |
| 60 | 3.1577161383285 |
| 70 | 3.6840021613833 |
| 80 | 4.210288184438 |
| 90 | 4.7365742074928 |
| 100 | 5.2628602305476 |
| 110 | 5.7891462536023 |
Definition of year (Gregorian) unit: = 365.2425 d average. As the common year has 365 days, the Gregorian calendar with leap years compensate the deviation from the real, astronomical year. According to this calendar, every 4th year is a leap year, except for every 100th. But every 400th is a leap year. This means that there are 97 leap years in 400 year period. So according to Gregorian's calendar, one year has 365 + 97/400 days (average). This is not a perfect approach, but in 1000 year period, the defiation is only 0.3 days compared to the astronomical year. In the year 1582 Gregorian replaced the Julian calendar.
Definition of Metonic cycle; enneadecaeteris unit: ≡ 6940 d. For astronomy and calendar studies, the Metonic cycle or Enneadecaeteris is a period of very close to 19 years that is nearly a common multiple of the solar year and the synodic month. ≡ 110 mo (hollow) + 125 mo (full) = 6940 d ≈ 19 a = 599.616 Ms
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