Mass-radius diagram. Filled and open circles are the position of the primary and secondary star for different orbital inclinations, decreasing from 90° with a step of 5°. Squares correspond to the solution with orbital inclination i = 72 deg and the open triangle to the secondary configuration with log   g = 4.15. Various theoretical sequences have been plotted for comparison: isochrones (dashed blue lines, labeled with log(age)), zero-age, and terminal-age main sequences (black), isotherms (red), and iso-gravity curves (green, labeled with log   g).