《宋书·志·卷十三》
求行星出现日期的方法：将行星发生合的日期和日余加上它合后仍然不出现的天数和余，余如满纪法则减去纪法在曰数上进一，用前述的方法对应就得到行星出现的日期。
求星见日术：以伏日及余，加星合日及余，余满纪法从日，命如前，见日也。
Method for calculating the date of planetary occurrence: Add the date of the planet's conjunction and the day remainder to the number of days and remainder when it still does not appear. If the remainder is full, subtract the Almanac method and add one to the day. Use the aforementioned method to correspond to the date of the planet's appearance.