Convert Sidereal Minutes (min-sr) to Hours (hr) | min-sr in hr

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# Let's convert Sidereal Minutes (min-sr) to Hours (hr)

This quick and easy calculator will convert Sidereal Minutes (min-sr) to Hours (hr) and show formula, brief history on the units and quick maths for the conversion.

## Quick Reference for Converting Sidereal Minutes to Hours

Formula
hr = min-sr / 60.16
Quick Rough Maths
To get the Hours, divide the number of Sidereal Minutes by 60.2
Sidereal Minutes (min-sr) in 1 Hour
There are 60.16 Sidereal Minutes in 1 Hour
Hours (hr) in 1 Sidereal Minute
There are 0.02 Hours in 1 Sidereal Minute

## Unit Information

Sidereal Minute
/sʌɪˈdɪərɪəlˈ mɪnɪt/
Symbol: min-sr
Unit System: SI

### What is the Sidereal Minute?

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

1 sidereal minute is made up of 60 sidereal seconds. 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.

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.