Same analysis as in Fig. 20, but for HD 156292 (O9.7III). Final model (red) with Ṁ = 1.5 × 10⁻⁹M_⊙ yr⁻¹ and T_eff = 31 000 K. Top panels: models with the limits on Ṁ (7.5 × 10⁻¹⁰ M_⊙ yr⁻¹ in green and 5.5 × 10⁻⁹ M_⊙ yr⁻¹ in blue): fixed T_eff = 31 000 K. Bottom panels: models with the limits on T_eff (28 000 K in green and 33 000 K in blue): fixed Ṁ = 1.5 × 10⁻⁹ M_⊙ yr⁻¹. We note that the error bars of T_eff do not produce any significant changes in the considered mass-loss diagnostics.