《明史·志·卷十三》
如果想得到详细的数据，以所得到的数据与各星的日自行定度相减，余数用各星的一日自行定度相约，如土星一日的自行定度为五十七分多等。就得到停留时间在本日前后的数据。
欲得细率，以所得数与其人日自行定度相减，馀以各星一日自行度约之，即得留日在本日前后数也。
If one wants to obtain more detailed data, subtract the data obtained from the daily self-rotation of the stars; then reduce the remainder by the daily self-rotation for each star, such as the daily self-rotation of Saturn, which is more than 57 minutes. Then one can obtain the data for the stop time before and after this day.