1. During what month of 2014 will Rosetta reach the comet
   67P/Churyumov-Gerasimenko and initiate an orbit around it? 

      Sometime between May 2014 and August 2014.


2. At that time, what will the celestial coordinates (RA and Dec) 
   of the comet be? Rough values are okay.

                               RA    (J2000)     Dec
      early May, 2014:   19 52 24.32      -27 22 47.3
      late Aug,  2014:   18 40 08.35      -30 53 00.5


3. Scientists will need to communicate with the spacecraft at this time. Where
   should the radio dishes be on Earth to allow the best signals to be received
   from the spacecraft during this crucial time? 
   For example, would it be a good idea to put radio dishes in Rochester? 

      Since the spacecraft will be far to the south the 
      celestial equator, the dish should be to the south 
      of the earth's equator: in the southern hemisphere.
      The spacecraft would be very low, about 15 degrees at 
      most, above the Rochester horizon.