Definition:Tropical Year

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Definition

The tropical year is the time interval between two consecutive passages, in the same direction, of the Sun through the equatorial plane of Earth.


\(\ds \) \(\) \(\ds 1\) tropical year
\(\ds \) \(\approx\) \(\ds 365 \cdotp 24219 \, 878\) mean solar days
\(\ds \) \(\approx\) \(\ds 365 \cdotp 24219 \, 878 \times 24 \times 60 \times 60\) seconds


That is:

\(\ds \) \(\) \(\ds 1\) tropical year
\(\ds \) \(\approx\) \(\ds 365\) mean solar days,
\(\ds \) \(\) \(\ds 5\) hours,
\(\ds \) \(\) \(\ds 48\) minutes, and
\(\ds \) \(\) \(\ds 45 \cdotp 9747\) seconds


Also known as

The tropical year is also known as the solar year.


Also see

  • Results about the tropical year can be found here.


Sources