Dipole (ℓ = 1) average of the computed period spacings, , assessed in a range of periods that includes the periods observed in HS 2324, shown as solid (dashed) curves corresponding to stages before (after) the maximum T_eff for different stellar masses. The location of HS 2324 when we use the effective temperature derived by Dreizler et al. (1996), T_eff = 130 000  ±  10 000 K, and the period spacing Δ Π = 16.407 ± 0.062 s derived in Sect. 3.2 is highlighted with a blue circle. The stellar mass derived from linear interpolation is M_⋆ = 0.727 ± 0.017 M_⊙ if the star is before the maximum T_eff, and by linear extrapolation, it is M_⋆ = 0.758  ±  0.018 M_⊙ if the star is after the maximum T_eff.