Conversion number between lustre; lustrum and year (Julian) [a, y, or yr] is 4.9965776865161. This means, that lustre; lustrum is bigger unit than year (Julian).
Switch to reverse conversion:
from year (Julian) to lustre; lustrum conversion
| lustre; lustrum |
Result in year (Julian)
?If conversion between lustre; lustrum to second and second to year (Julian) is exactly definied, high precision conversion from lustre; lustrum to year (Julian) is enabled.
Decimal places: (0-800)
lustre; lustrum| Start value: | [lustre; lustrum] |
| Step size | [lustre; lustrum] |
| How many lines? | (max 100) |
| lustre; lustrum | year (Julian) |
|---|---|
| 0 | 0 |
| 10 | 49.965776865161 |
| 20 | 99.931553730322 |
| 30 | 149.89733059548 |
| 40 | 199.86310746064 |
| 50 | 249.8288843258 |
| 60 | 299.79466119097 |
| 70 | 349.76043805613 |
| 80 | 399.72621492129 |
| 90 | 449.69199178645 |
| 100 | 499.65776865161 |
| 110 | 549.62354551677 |
Definition of lustre; lustrum unit: ≡ 5 years (of 365 d). A lustre is a period of five years. Its use dates back to Ancient Rome, when a lustrum was a five-year period at the end of which a full census of the Roman population would be carried out. = 5*365*86400 = 157.68 Ms
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.
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