How many sidereal month in 1 sidereal year? The answer is 13.368745997402. We assume you are converting between sidereal month and sidereal year. You can view more details on each measurement unit: sidereal month or sidereal year The SI base unit for time is the second. 1 second is equal to 4.2362262070237E-7 sidereal month, or 3.1687536047488E-8 sidereal year. Note that rounding errors may occur, so always check the results. Use this page to learn how to convert between months and years. Type in your own numbers in the form to convert the units!
You may also want to find out how many days are between two dates on the calendar. Use the date calculatorto get your age in days or measure the duration of an event.
1 sidereal month to sidereal year = 0.0748 sidereal year
10 sidereal month to sidereal year = 0.74801 sidereal year
20 sidereal month to sidereal year = 1.49603 sidereal year
30 sidereal month to sidereal year = 2.24404 sidereal year
40 sidereal month to sidereal year = 2.99205 sidereal year
50 sidereal month to sidereal year = 3.74007 sidereal year
100 sidereal month to sidereal year = 7.48013 sidereal year
200 sidereal month to sidereal year = 14.96027 sidereal year
You can do the reverse unit conversion from sidereal year to sidereal month, or enter any two units below:
The sidereal month is defined as the Moon's orbital period in a non-rotating frame of reference (which on average is equal to its rotation period in the same frame). It is about 27.32166 days (27 days, 7 hours, 43 minutes, 11.6 seconds). The exact duration of the orbital period cannot be easily determined, because the 'non-rotating frame of reference' cannot be observed directly. However, it is approximately equal to the time it takes the Moon to pass twice a "fixed" star (different stars give different results because all have proper motions and are not really fixed in position).
A sidereal year (from Latin sidus "asterism, star") is the time taken by the Earth to orbit the Sun once with respect to the fixed stars. Hence it is also the time taken for the Sun to return to the same position with respect to the fixed stars after apparently travelling once around the ecliptic. It equals 365.25636 SI days for the J2000.0 epoch.
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