We present radial-velocity measurements obtained with the ELODIE and AFOE spectrographs for GJ 777 A ( HD 190360 ) , a metal-rich ( [ Fe/H ] = 0.25 ) nearby ( d = 15.9 pc ) star in a stellar binary system .
A long-period low radial-velocity amplitude variation is detected revealing the presence of a Jovian planetary companion .
Some of the orbital elements remain weakly constrained because of the smallness of the signal compared to our instrumental precision .
The detailed orbital shape is therefore not well established .
We present our best fitted orbital solution : an eccentric ( e = 0.48 ) 10.7–year orbit .
The minimum mass of the companion is 1.33 M _ { Jup } .