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The Transiting Exoplanet Survey Satellite (TESS) is an all-sky survey missionaiming to search for exoplanets that transit bright stars. The high-qualityphotometric data of TESS are excellent for the asteroseismic study ofsolar-like stars. In this work, we present an asteroseismic analysis of thered-giant star HD~222076 hosting a long-period (2.4 yr) giant planet discoveredthrough radial velocities. Solar-like oscillations of HD~222076 are detectedaround $203 \, \mu$Hz by TESS for the first time. Asteroseismic modeling, usingglobal asteroseismic parameters as input, yields a determination of the stellarmass ($M_\star = 1.12 \pm 0.12\, M_\odot$), radius ($R_\star = 4.34 \pm0.21\,R_\odot$), and age ($7.4 \pm 2.7\,$Gyr), with precisions greatly improvedfrom previous studies. The period spacing of the dipolar mixed modes extractedfrom the observed power spectrum reveals that the star is on the red-giantbranch burning hydrogen in a shell surrounding the core. We find that theplanet will not escape the tidal pull of the star and be engulfed into itwithin about $800\,$Myr, before the tip of the red-giant branch is reached.

TESS Asteroseismic Analysis of the Known Exoplanet Host Star HD 222076