《明史·志·卷三》
二十九年八月戊子日，钦天监说，井宿东北第二星，接近岁星渐渐变暗变小，急促聚合而不直列。
二十九年八月戊子，钦天监言，井宿东北第二星，近岁渐暗小，促聚不端列。
On August Wuxu Day in the 29th year, the Imperial Astronomical Observatory reported that the second star to the northeast of the Jing celestial mansion gradually dimmed and shrank and then gathered quickly but was not aligned.