We analyze photometric and spectroscopic data and study the orbital period of the early-type interacting binary system V382 Cyg by using all the available data. We obtain a simultaneous light and radial velocity curve solution. The derived physical parameters of the primary and secondary stellar components are M 1?= 27.9(5) M ☉, M 2?= 20.8(4) M ☉, R 1?= 9.7(2) R ☉, R 2?= 8.5(2) R ☉, log (L 1/L ☉) = 5.152(20), and log (L 2/L ☉) = 4.954(19) while the separation of the components is a?= 23.4 R ☉. Newly obtained parameters yield the distance of the system to be 1466(76) pc. Analyses of the mid-eclipse times indicate a period increase of dP/dt = 4.2(1) × 10–7?days?yr–1 that can be interpreted in terms of the high-mass transfer (dM/dt = 6.1(5) × 10–6 M ☉?yr–1) from the less massive component to the more massive component. Finally, we model the evolution of the components using non-conservative codes and discuss the results obtained. The age of the binary system is estimated to be 3.85?Myr.
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