on 
 
         | LT_ACTUAL - LT_COMPUTED |  /  LT_ACTUAL 
 
      is at most  
 
          (V/C)**2 
         ---------- 
          1 - (V/C) 
 
      which is well approximated by (V/C)**2, where V is the 
      velocity of the target relative to an inertial frame and C is 
      the speed of light. 
 
      For nearly all objects in the solar system V is less than 60
      km/sec. The value of C is ~300000 km/sec. Thus the
      one-iteration solution for LT has a potential relative error
      of not mor