 blanks in
               `target' are not significant. Optionally, you may supply
               a string containing the integer ID code for the object.
               For example both &quot;MOON&quot; and &quot;301&quot; are legitimate strings
               that indicate the moon is the target body.
 
               This routine assumes that the target body's surface is
               represented using a plate model, and that a DSK file
               containing the plate model has been loaded via <a hre