HR diagram comparing parameters of MESA-RSP models of Y Oph given in Table 2 (crosses) with evolutionary tracks computed with MESA for different stellar masses (MESA version r-21.12.1 used by Ziółkowska et al., in prep.). These models assume an overshooting parameter f_ov = 0.02. The vertical blue strip corresponds to the measured value of the mean effective temperature for Y Oph, i.e. T_eff = 5800 ± 100 K.