Am trying to do a simple test of 2-stars fix math with Skyfield python lib and Celestial Programming site at https://www.celestialprogramming.com/snippets/twoStarFix.html
So I’m getting the data of imagined observation about a 2 stars from Hipparcos using Skyfield for some geographic position at a time t. Then I’m calculating back the geographic position of observer using the math from Celestial Programming site. And I’m getting a big error, eg.: