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We present the detailed fundamental stellar parameters of the close visualbinary system; HD39438 for the first time. We used Al-Wardat's method foranalyzing binary and multiple stellar systems (BMSSs). The method implementsKurucz's plane parallel model atmospheres to construct synthetic spectralenergy distributions for both components of the system. It then combines theresults of the spectroscopic analysis with the photometric analysis and thencompares them with the observed ones to construct the best synthetic spectralenergy distributions for the combined system. The analysis gives the precisefundamental parameters of the individual components of the system. Based on thepositions of the components of HD39438 on the H-R diagram, and evolutionary andisochrones tracks, we found that the system belongs to the main sequence starswith masses of 1.24 and 0.98 solar masses for the components A and B,respectively, and age of 1.995 Gyr for both components. The main result ofHD39438 is new dynamical parallax, which is estimated to be 16.689+- 0.03 mas.

Modified masses and parallaxes of close binary system: HD39438