Upper panels: HR diagrams. The luminosity 112.6 L_⊙, plotted as a red dot on the L_*/L_⊙−T_eff HR diagram, was derived by integrating a single-temperature (1T) dereddened model with T_eff=9040 K, which also fits the SED giving a value of the total flux, F_*. The Gaia DR3 parallax and the expression L_*=4 π d² F_* allowed us to compute the luminosity. The two blue dots in both diagrams correspond to parameters consistent with the binary scenario where the SED is reproduced by models for two coeval stars with parameters (T_eff, log g) (9010 K, 3.82) (9105 K, 3.89), for components 1 and 2 (labelled C1 and C2), respectively, whose luminosities add up to the total luminosity of 112.6 L_⊙. PARSEC 2.1s tracks and isochrones were used in this analysis. Lower panels: Observed photometry (blue dots), STIS/HST and IUE spectra of HD 85905 (red and orange lines, respectively), and the Kurucz photospheric models for components C1 and C2 built with the parameters shown in the legend, reddened with A_V=0.237. The models fulfil the observational constraint of a contrast in the flux in the H band of 0.855 ± 0.076 from the PIONIER data (see text for details).