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Convert julian year to sidereal year

Here you can quickly calculate how many sidereal year fit in one julian year.

- scroll: formula · table · questions -

  • 1 = 0.999983
  • 1 = 1.000017

Julian year to sidereal year conversion table

julian year sidereal year
1 0.999983
2 1.999965
5 4.999913
10 9.999826
20 19.999651
50 49.999129
100 99.998257

Formula to convert julian year to sidereal year

To convert julian year to sidereal year, multiply by 0.999983.

1 = 0.999983
Example: 1 julian year = 0.999983 sidereal year

Common mistakes in time conversion

  • There are several year definitions: the Julian year is exactly 365.25 days, the Gregorian calendar year 365.2425, and the tropical year about 365.2422 days. For everyday use the differences are negligible, but they matter in astronomy, the light-year, for instance, is defined using the Julian year.

Quick julian year to/from sidereal year conversion quiz

Score: 0

102 julian year equals 102 sidereal year.

Correct answer: 102 julian year = 102 sidereal year.

5 julian year equals 5 sidereal year.

Correct answer: 5 julian year = 5 sidereal year.

245 sidereal year equals 208 julian year.

Correct answer: 245 sidereal year = 245 julian year.

More conversions in time