How accurate is it to choose a star on a moving day?

The palace will not change, but its mobility. The so-called mobility is its running speed. Five-star orbits vary in size, but they all run counterclockwise. There will be repulsion between stars. When two stars are close, one star will run faster or slower than usual, and the big star will attract the small star. That is, if the little star is in front, the little star will slow down because of attraction, in other words, the big star behind will be faster than usual. Therefore, the daily itinerary of the seven houses will be different every year, and the sun will not move. The ancients originally said that they would not move for 28 nights, but later they changed slightly according to the measurements of various dynasties.

There are many kinds of dotted dates, and the most subtle is the dotted arc angle diagram. But if there is a slight calculation error, this day shift will be invalid and there will be few days available in a year. Another star class is easier to remember and understand. There are more daily classes than arc graphs. As long as the calculation is not bad, even the error is not bad. Every time the sun in a house reaches 14 degrees, it is the time to pay the solar terms. In other words, the time when the earthly branch mountain becomes the heavenly dry mountain is the time to pay the solar terms. On the first day of the first month of the agricultural year in Shen Jia, the sun is 0.56.4 1 in Zi Shan, and before noon on14.09.15 ""; 19:56 entered Renshan, and the time to enter Renshan at this time is 19:56 ",which is the time to pay beginning of spring. 15th is the standard time of East Eight Districts above Renshan 15.15 (15 degrees 10 minutes15 seconds).