Traditional Culture Encyclopedia - The 24 Solar Terms - Advanced solar terms calculation
Advanced solar terms calculation
Originally, according to the formula of 24 solar terms, the error was only three or two days. This formula reduces the error, which is actually a sinusoidal period. 2π divided by 24 is 0.262, and 24 solar terms are 2π, which is 360 degrees.
f = 365.242 * y+6.2+ 15.22 * x- 1.9 * sin(0.262 * x)
= 365.242 *( 1)+6.2+ 15.22 * 14- 1.9 * sin(0.262 * 14)
=- 145 (days)
The future is uncertain, which should be 365/2= 183 (days).
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