How many milliday in 1 sidereal year? The answer is 365256.36. We assume you are converting between milliday and sidereal year. You can view more details on each measurement unit: milliday or sidereal year The SI base unit for time is the second. 1 second is equal to 0.011574074074074 milliday, 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 millidays 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.
You can do the reverse unit conversion from sidereal year to milliday, or enter any two units below:
The SI prefix "milli" represents a factor of 10-3, or in exponential notation, 1E-3.
So 1 milliday = 10-3 days.
The definition of a day is as follows:
A continuous period of 24 hours which, unless the context otherwise requires, runs from midnight to midnight.
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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