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tropical year
subjectfact 
tropical yearhas value 365.242 mean solar dayshas source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:52.0
has definition The period of one complete revolution of the mean longitude of the sun with respect to the dynamical equinox. The tropical year is longer than the Besselian year by 0s.148 T, where T is centuries from B1900.0.has source: Seidelman, P. 1992 Explanatory Supplement to the Astronomical Almanac, University Science Books, Mill Valley, CA, 2001-09-27 09:32:52.0
has definition The interval of time between two successive vernal equinoxes.has source: Hopkins, J. 1976 Glossary of Astronomy and Astrophysics, University of Chicago Press, 2001-09-27 09:32:52.0
is an instance of year2001-09-27 09:32:52.0
time unitis a unit of time2001-09-27 09:32:52.0
unithas historical origin2001-09-27 09:32:42.0
represents2001-09-27 09:32:42.0