ng the integer ID code for
               the object. For example both 'MOON' and '301' are
               legitimate strings that indicate the moon is the
               target body.

               [1,c2] = size(target); char = class(target)

                  or

               [1,1] = size(target); cell = class(target)

      ilusrc   is the name of the illumination source. This source
               may be any ephemeris object. Case, blanks, and
               numeric values are treated in the same way