Q:  After 500 days, what do the radial velocity measurements
           reveal to us?

         Everything!  
 
         We know that the period is about 370 days, which will allow
         us to determine the size of the planet's orbit.

         The maximum-to-minimum change in the star's velocity is
         also clear now: about 29 meters per second.  With this
         information, we can compute the mass of the planet.



  Q:  After 500 days, what do the transit measurements reveal to us?


         Finally!  We see a second dip, of the same size, which
         means that the first dip was PROBABLY real.  A third dip
         would give us more confidence.

         The period appears to be about 380 days ... but that's
         just a guess.  We might have missed a dip earlier.
         To be sure, we need to observe a third dip; if it occurs
         after another 380 days, then we'll have the period.

         So we have to wait _another_ 380 days.