Conversion number between year (Julian) [a, y, or yr] and day (sidereal) [d (sidereal)] is 366.25002139038. This means, that year (Julian) is bigger unit than day (sidereal).
Switch to reverse conversion:
from day (sidereal) to year (Julian) conversion
| [a, y, or yr] |
Result in day (sidereal)
?If conversion between year (Julian) to second and second to day (sidereal) is exactly definied, high precision conversion from year (Julian) to day (sidereal) 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) | day (sidereal) |
|---|---|
| 0 | 0 |
| 10 | 3662.5002139038 |
| 20 | 7325.0004278076 |
| 30 | 10987.500641711 |
| 40 | 14650.000855615 |
| 50 | 18312.501069519 |
| 60 | 21975.001283423 |
| 70 | 25637.501497326 |
| 80 | 29300.00171123 |
| 90 | 32962.501925134 |
| 100 | 36625.002139038 |
| 110 | 40287.502352942 |
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 day (sidereal) unit: ≈ 23 h, 56 min, 4.0916 sec. A sidereal day is the time needed for the Earth to rotate once around its axis so that the distant stars appear in the same position in the sky. This is ~4 minutes shorter than the solar day.
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