Absolute properties of the neglected eclipsing B-type binary HD 194495

We present the results of the high-resolution spectroscopic observations of the neglected binary system HD\,194495 (B3\,IV-V+B4\,V). A combined analysis of three different photometric data set (\(Tycho\) B\(_T\) and V\(_T\) photometry, H\(_p\)-band data of \(Hipparcos\) and \(V-\)band data of ASAS3 photometry) and radial velocities indicates that the system has an orbital period of 4.90494 \(\pm\) 0.00005 days and an inclination of 69\(\pm\)1 degrees. This solution yields masses and radii of \(M_{\rm 1}\) = 7.57\(\pm\)0.08 \(M_{\odot}\) and \(R_{\rm 1}\) = 5.82\(\pm\)0.03 \(R_{\odot}\) for the primary and \(M_{\rm 2}\) = 5.46\(\pm\)0.09 \(M_{\odot}\) and \(R_{\rm 2}\) = 3.14\(\pm\)0.08 \(R_{\odot}\) for the secondary. Based on the position of the two stars plotted on a theoretical H-R diagram, we find that the age of the system is \(\gtrsim\) 28 Myr, according to stellar evolutionary models. The spectroscopic and photometric results are in agreement with those obtained using theoretical predictions.