《宋史·志·卷三》
建六颗星，在南斗魁的东北面，下临黄道，又叫天旗，天的总关隘。
建六星，在南斗魁东北，临黄道，一曰天旗，天之都关。
The six Jian stars are located northeast of the head of the Southern Dipper, below the ecliptic, and are also called the Tian Qi, the Heavenly Pass.