HRD for the components of LB-1 as derived here (with error bars). The single star solution is the filled star, while the binary solution components are filled circles joined by a dotted line. The Be star, or broad lined star, is the hotter of these two components. The Shenar et al. (2020) parameters are indicated (diamonds), as are our estimates using our updated values of extinction and distance (triangles). Also indicated are the positions for HR 6819 (open circles) as determined by Bodensteiner et al. (2020). For context the evolutionary tracks are the non-rotating (solid lines) and rotating (dashed lines) single star models from Ekström et al. (2012). Symbols are labeled with their spectroscopic masses, and each track is labeled with its initial mass.