Q:  What is the total mass of both stars in the
      Procyon system, in terms of solar masses?


                                                    3
                             (semi-major axis in AU)
    total mass (solar)   =  -------------------------
                                                 2
                                (Period in years)

           In round numbers,


                              (14 AU)^3
                         =   -----------    =   about 1.6  solar masses
                              (41 yr)^2