《明史·志·卷十三》
引数在六宫以前为黄道北，在六官以后为黄道南。求计都、罗喉的运行度数：将积年代入总年零年月日数据表内，取计都、罗喉的中心运行度数相加，为这一年白羊宫第一日的运行度数。
求纬以计都与月相离宫度为引数，入太阴纬度立成，取其度分，依比例法求得零分加减之，得纬度分。求计罗行度置积年入总年零年月日立成内，取罗计中心行度并之，为其年白羊宫一日行度。
The argument is the north ecliptic before the six palaces, and the south ecliptic after the six coefficients. Finding the running degree of Jidu and Rahu: enter the total year into the data table of zero month, day, and day, take the central running degree of Jidu and Rahu to be added, as the running degree of the first day of Aries Palace.