Convert Sidereal Days (d-sr) into other units of time e.g. s, d, hr, mo, a

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Let's convert Sidereal Days (d-sr) to another unit of Time

This quick and easy calculator will convert Sidereal Days (d-sr) into other units of time e.g. s, d, hr, mo, a

Choose a unit to convert Sidereal Days into:

Common
Days
(d)
Common
Hours
(hr)
Common
Months
(mo)
Common
Seconds
(s)
Common
Years
(a)
Minutes
(min)
Sidereal Hours
(hr-sr)
Sidereal Minutes
(min-sr)
Sidereal Seconds
(s-sr)
Sidereal Years
(a-sr)
Tropical Years
(at)

Unit Information

Sidereal Day
/sʌɪˈdɪərɪəl deɪ/
Symbol: d-sr
Unit System: SI

What is the Sidereal Day?

The sidereal day is a unit of time used by astronomers and is derived from the SI unit system. We have used the symbol d-sr.

Sidereal literally means "of the stars". Otherwise known as the "orbital period", it defines the time period taken for two point masses to orbit each other.

On Earth, we used the solar day to regularise time and this represents the period taken to orbit the sun. The sidereal day (or stellar day) is the time taken for the earth to rotate with respect to a distant star and equals 23 hours, 56 minutes and 4.0905 seconds (or 86164.1 s, 23.934 h).