The solar equation table of the Dayan Calendar is a mathematical table of equally quartic difference, and it reflects Yi Xing's profound understanding about the solarmotion.
《大衍历》日躔表是一份四次差分相等的数表，反映一行对太阳运动复杂性的深刻认识。
2
The reverse time of the crest motion depends on the smallest zenith Angle and on solar cycle.
运动的反向时间随太阳的最小天顶角的大小而变化，随太阳活动而变化。
3
In this paper, the problem on the stable region of the motion of P-type retrograde minor bodies in the solar system is discussed.