What is 31s-sr in Tropical Years?

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What is 31 Sidereal Seconds (31s-sr) in Tropical Years (at)?

What is 31s-sr in at? Convert 31 Sidereal Seconds (31s-sr) to Tropical Years (at) and show formula, brief history on the units and quick maths for the conversion.

Enter Sidereal Seconds to convert to Tropical Years


Quick Reference for Converting Sidereal Seconds to Tropical Years

Formula
at = s-sr / 31643330.21
Quick Rough Maths
To get the Tropical Years, divide the number of Sidereal Seconds by 31.6 million
Sidereal Seconds (s-sr) in 1 Tropical Year
There are 31643330.21 Sidereal Seconds in 1 Tropical Year
Tropical Years (at) in 1 Sidereal Second
There are 0 Tropical Years in 1 Sidereal Second

Unit Information

Sidereal Second
/sʌɪˈdɪərɪəlˈsɛk(ə)nd/
Symbol: s-sr
Unit System: SI

What is the Sidereal Second?

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

1 sidereal second is 1/60 of a sidereal minute. 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.

Like with normal seconds, minutes, hours and days, there are still 60 x 60 x 24 seconds in a day, but the day itself is approximately 23 h 56 min and 4.1 s in (normal) seconds.

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.


Conversion Tables for Sidereal Seconds (s-sr) to Tropical Years (at)