Average of the computed period spacings for ℓ = 1 corresponding to our DB white dwarf sequences with different stellar masses. The location of KUV 05134+2605 is shown with a red asterisk (T_eff = 24 700 ± 1300 K) for the observed ΔΠ_{ℓ = 1} = 31.4 ± 0.3 solution of mean period spacing. By simple linear interpolation, we found that the mass of the star according to its period spacing is M_∗ = 0.85 ± 0.05 M_⊙.