Tiankui star, which star corresponds to the sky?

Tiankuixing refers to Songjiang in the Water Margin. It also exists in astronomy, but it is not an official name. Beidou-1 star, that is, the one at the mouth of the spoon, is officially called Beidou-1 and Shu Tianxing, also known as Wolf-greedy, Tiankui and Tianyi Noble. There are no stars outside the sky, and there are no such people and stars in the water margin and the star map. Maybe you have the wrong number. It should be the star of Luo Tian. Only the fortune teller said that this star is a noble person in Yutang, but there is no such star in the map, so there is no way to verify it.