What is 8100hr-sr in Hours?

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What is 8100 Sidereal Hours (8100hr-sr) in Hours (hr)?

What is 8100hr-sr in hr? Convert 8100 Sidereal Hours (8100hr-sr) to Hours (hr) and show formula, brief history on the units and quick maths for the conversion.

Enter Sidereal Hours to convert to Hours


Quick Reference for Converting Sidereal Hours to Hours

Formula
hr = hr-sr / 1
Quick Rough Maths
Hours and Sidereal Hours are approximately equal
Sidereal Hours (hr-sr) in 1 Hour
There are 1 Sidereal Hours in 1 Hour
Hours (hr) in 1 Sidereal Hour
There are 1 Hours in 1 Sidereal Hour

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.

Hour
/ˈaʊə/
Symbol: hr
Unit System: SI

What is the Hour?

The hour is a unit of time and is a multiple of an SI base unit with the symbol hr.

There are 60 seconds in a minute and 60 minutes in an hour. Consequently, there are 3600 seconds in an hour.

In a mean solar day, there are 24 hours.

Originally in the Middle East, the hour was defined as 1/12 of the day or night time. However, seasonal factors clearly affected all of these definitions and an average is used today to normalise and allow calculations.


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