Recent radial-velocity measurements obtained with the CORALIE spectrograph on the 1.2-m Euler Swiss telescope at La Silla unveil the presence of a new Jovian-mass Hot Jupiter around HD 73256 .
The 1.85-M _ { Jup } 
planet moves on an extremely short-period ( P = 2.5486 d ) , quasi-circular orbit .
The best Keplerian orbital solution is presented together with an unsuccessful photometric planetary-transit search performed with the SAT Danish telescope at La Silla .
Over the time span of the observations , the photometric follow-up of the candidate has nevertheless revealed a P \simeq 14-d photometric periodicity corresponding to the rotational period of the star .
This variation as well as the radial-velocity jitter around the Keplerian solution are shown to be related to the fair activity level known for HD 73256 .