V957 Cep is a Zero-Age Eclipsing System

New high-precision photometric measurements of the V957 Cep system (P = 1.99d, V = 11.17m, e = 0.127, B6 V+B8 V), as well as an integrated approach to orbital parameters determining based both on photometric solutions of the light curves and on the study of the course of residual deviations of the minima timings from the linear formula O – C made it possible for the first time to accurately measure the apsidal motion rate: ω˙obs= 2.91°/year, which coincided with the theoretical value under the condition of the orbital and axial rotations synchronism:ω˙theor = 2.92°/year. The physical parameters of the component stars were obtained: T1 = 14550 ± 300 K, M1 = 4.0 ± 0.2 M•, R1 = 2.55 ± 0.05 R•, T2 = 12400 ± 250 K, M2 = 3.0 ± 0.15 M•, R2 = 1.88 ± 0.05 R•. This set of parameters corresponds to stars of zero age, recently descended to ZAMS. The secondary component is a pulsating variable star of the β Cephei type.