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

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Let's convert Sidereal Hours (hr-sr) to another unit of Time

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

Choose a unit to convert Sidereal Hours into:

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

Unit Information

Sidereal Hour
/sʌɪˈdɪərɪəlˈaʊə/
Symbol: hr-sr
Unit System: SI

What is the Sidereal Hour?

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

1 sidereal hour is made up of 60 sidereal minutes. This is derived ultimately from the sidereal day which is the time taken (in solar seconds) for the Earth to complete one rotation with respect to a distant star or constellation.

The sidereal hour angle is used when calculating sidereal time which is actually the angle along the celestial equator; from where one stands to the great circle that travels through the March equinox and both celestial poles.