The main star of the life palace in Ziwei Dou Shu is calculated based on the birth date, male and female, and according to the An Xing method of Zi Wei Dou Shu. There is no direct comparison table like the constellation. It is much more complicated than the constellation, but it is also much more accurate than the constellation.
The simpler way is to search Jiyuange on Baidu. They can calculate it for free, or you can find a layout software yourself, but it is very complicated and difficult to understand