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Rotational year
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The rotational year is mathematically derived from a single rotation of the Earth. The year is compliant with two types of diurnal rotation; the solar day of 86,400 seconds, and the stellar day of 86,164.098903691 seconds. The ratio of the two diurnal day types is 1.002737811911347. The rotational year is completed when the two types of rotation differ by 1.0 and comply with the diurnal ratio. The duration of the rotational year is 365.2551863973876 solar days. When the solar days are multiplied by the diurnal ratio, the stellar day quantity becomes 366.2551863973876 which differs from the solar quantity by 1.0 rotations. The rotational year is described in a paper entitled An Elementary Proof of Earth's Rotational Year. A year of 365.255 days was identified by Ha Sung Chun, one of the first astronomers in China who understood that more than one type of year existed. 365.255 Earth days is listed as period of orbit and a planetary constant in NASA Technical Note D-3900. Year Earth's rotation Solar time Precession Theory of relativity Gravity See Also
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