《明史·志·卷八》
方法是：将天圆半径六十度八十七分半，减黄道四十四度时赤道小弦五十八度三十五分六十九秒，余二度五十一分八十一秒，就是黄道赤道小弧矢。
术曰： 置半径六十零度八十七分半，内减黄道四十四度下赤道小弦五十八度三十五分六十九秒，余二度五十一分八十一秒，为黄赤道小弧矢。
The method is: Subtract the short chord of the equator fifty-eight degrees thirty-five minutes and sixty-nine seconds from the radius of the celestial sphere sixty degrees eighty-seven minutes and a half when the yellow zodiac is forty-four degrees, leaving two degrees fifty-one minutes and eighty-one seconds, which is the short arrow of the yellow zodiac.