How many Sidereal Hours are there in a Sidereal Year?

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How many Sidereal Hours are there in a Sidereal Year?

What is 1a-sr in hr-sr? Convert 1 Sidereal Year (1a-sr) to Sidereal Hours (hr-sr) and show formula, brief history on the units and quick maths for the conversion.

Enter Sidereal Years to convert to Sidereal Hours


Quick Reference for Converting Sidereal Years to Sidereal Hours

Formula
hr-sr = a-sr x 8790.15
Quick Rough Maths
To get the Sidereal Hours, multiply the number of Sidereal Years by 8.8 thousand
Sidereal Years (a-sr) in 1 Sidereal Hour
There are 0 Sidereal Years in 1 Sidereal Hour
Sidereal Hours (hr-sr) in 1 Sidereal Year
There are 8790.15 Sidereal Hours in 1 Sidereal Year

Unit Information

Sidereal Year
/sʌɪˈdɪərɪəl jɪə,jəː/
Symbol: a-sr
Unit System: SI

What is the Sidereal Year?

The sidereal year is a unit of time that is a multiple of an SI unit. We have used the symbol a-sr.

From the Latin ‘sidus’ for ‘star’, sidereal is a term used to describe the orbital time of the earth or an object to complete one full cycle with respect to a fixed, distant star or constellation pattern.

The sidereal year is defined as 365.242 190 402 days of 86,400 SI seconds. This is 20 minutes and 24.5 seconds longer than a tropical year.

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.


Conversion Tables for Sidereal Years (a-sr) to Sidereal Hours (hr-sr)