The average radial velocity of CoRoT-Exo-2 is 23.2 km/s.


  The RM variations are roughly 0.2 km/s = 200 m/s in size.
      That's not at the limit of detection, certainly,
      but it's not big.

      By the way, the planet is a BIG one: its radius is roughly
          ONE-SIXTH of the stellar radius!   That --- and the planet's
          large mass, 3.3 Jupiter masses --- combine to make
          the RM variations so large.


  The pattern is "redshift -- neutral -- blueshift", so this planet
      is in a prograde orbit: its angular momentum is in the same
      direction as the star's spin angular momentum.