《宋史·志·卷三》
天纲一颗星，在北落师门西南，一说在危宿南面，主管皇帝的营帐和皇官住宿，天子游猎时的集会地方。
天纲一星，在北落西南，一曰在危南，主武帐宫舍，天子游猎所会。
The Tiangang star, located southwest of Beiluo Shimen, or in the south of Weisian, is in charge of the emperor's camp and the accommodation of imperial officials, as well as the gathering place for the emperor's hunting.