Convert Sidereal Minutes (min-sr) to Tropical Years (at) | min-sr in at

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# Let's convert Sidereal Minutes (min-sr) to Tropical Years (at)

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

## Quick Reference for Converting Sidereal Minutes to Tropical Years

Formula
at = min-sr / 527388.82
Quick Rough Maths
To get the Tropical Years, divide the number of Sidereal Minutes by 527.4 thousand
Sidereal Minutes (min-sr) in 1 Tropical Year
There are 527388.82 Sidereal Minutes in 1 Tropical Year
Tropical Years (at) in 1 Sidereal Minute
There are 0 Tropical Years 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.

Tropical Year
/ˈtrɒpɪk(ə)l jɪə,jəː/
Symbol: at
Unit System: SI

### What is the Tropical Year?

The tropical year is a unit of time that is a multiple of an SI unit. We have used the symbol at.

The average tropical year up to the year 2000 was 365.2422 days of 86400 seconds.

The phrase “tropical” comes from the Greek for “turn”; tropikos. Following this, and where the “turn” referred to is the same as that defining the tropics of Capricorn and Cancer (the extreme latitudes North and South where the sun can still appear directly overhead or perpendicular to the Earth’s surface); a tropical year is known as the time it takes the sun to complete a full cycle of seasons and return to the same relative position to the observer on Earth.

In 1627, Johannes Kepler used the findings of Tycho Brahe and Waltherus (the Rudolphine Tables) to establish the mean tropical year as 365 solar days, 5 hours, 48 minutes and 45 seconds.