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We present our results of a combined analysis of radial velocity and lightcurves of a double-lined spectroscopic and eclipsing binary KIC 09246715,observed photometrically by the $Kepler$ satellite, and spectroscopically withthe OAO-1.88m telescope with the HIgh-Dispertion Echelle Spectrograph (HIDES).The target was claimed to be composed of two red giants, one of which isshowing solar-like oscillations. We have found that the mass and radius of theprimary are $M_1=2.169\pm0.024$ M$_\odot$ and $R_1=8.47\pm0.13$ R$_\odot$, andof the secondary: $M_2=2.143\pm0.025$ M$_\odot$ and $R_2=8.18\pm0.09$R$_\odot$, which confirms the double-giant status. Our secondary is the star towhich the oscillations were attributed. Results of its previous asteroseismicanalysis are in agreement with ours, only significantly less precise, but thesubsequent light-curve-based study failed to derive correct mass and radius ofour primary. KIC 09246715 is one of the rare cases where asteroseismicparameters of a solar-like oscillator were confirmed by an independent method,and only the third example of a Galactic double-giant eclipsing binary withmasses and radii measured with precision below 2%.

Absolute stellar parameters of KIC 09246715 -- a double-giant eclipsing system with a solar-like oscillator