Conversion number between year (Julian) [a, y, or yr] and month (synodic) [mo] is 12.368530811991. This means, that year (Julian) is bigger unit than month (synodic).
Switch to reverse conversion:
from month (synodic) to year (Julian) conversion
| [a, y, or yr] |
Result in month (synodic)
?If conversion between year (Julian) to second and second to month (synodic) is exactly definied, high precision conversion from year (Julian) to month (synodic) is enabled.
Since definition contain rounded number(s) too, there is no sense for high precision calculation, but if you want, you can enable it. Keep in mind, that converted number will be inaccurate due this rounding error!
| Start value: | [year (Julian)] |
| Step size | [year (Julian)] |
| How many lines? | (max 100) |
| year (Julian) | month (synodic) |
|---|---|
| 0 | 0 |
| 10 | 123.68530811991 |
| 20 | 247.37061623982 |
| 30 | 371.05592435973 |
| 40 | 494.74123247963 |
| 50 | 618.42654059954 |
| 60 | 742.11184871945 |
| 70 | 865.79715683936 |
| 80 | 989.48246495927 |
| 90 | 1113.1677730792 |
| 100 | 1236.8530811991 |
| 110 | 1360.538389319 |
Definition of year (Julian) unit: = 365.25 d average. The basic calendar year has 365 days, but in fact the Earth needs a little more time around the sun. The Julian calendar compensated this with leap year (every fourth year had 366 days). According to the formula, a Julian year has 365 + 1/4 = 365.25 days. But even with this compensation, the astronomical year slip 0.78 days every 100 years into real seasons. Therefore, most countries have moved to the Gregorian calendar introduced in 1582.
Definition of month (synodic) unit: ≈ 29.530589 days. Synodic month = Cycle time of moon phases (example, from fool moon to next fool moon). This period is not constant and it is longer than moon rotation around Earth (sidereal month), because moon and Earth moves together around the Sun.
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