A rough estimate of the period of the planet's orbit is given
by the spacing of the transits:

         first dip  at  approx    day   1326 

         tenth dip                      1353
      ----------------------------------------
         nine dips    over                27 days


   That makes the period 

                                      27 days
          period  P    =    approx   --------   =    approx  2.9 days
                                         9