I can't see it. You might try running the obfu redirecting stdout to a file, then cutting and pasting the offending shape so we can see it. I just did that and the 5th image (a half size Saturn) looked ok to me and was 21 lines long (exactly half the 42 lines in the obfu). Here it is.

                                                          '''
                                                      '''''''
                                                   ''''''''' 
                                                 ''''''''''  
                                     $~~~-~'/$# ''    ''''   
                                  {~~~~~~(^=~~~~#    ''''    
                                 ~~~@)'~~~~~(/~~$#  '''      
                                @[=+'~~]\\'~~@[~~~#'''       
                               ---~\--~$=~#-~~~~] ''         
                              $.$~(----~~~$=~{~ '' ~         
                              !$+%~$],--}~~(~ '' ~~~         
                              (~~~./@)@=&~~ '' &~,~,         
                              ~>~,~$=$(-~ '' ),$(~!          
                            ''',~$-(),- ' -&~'~~~{           
                           ''   +.~~~ ' @=~~~@#~~            
                         '''     ~ '' $(~~~~~~!~             
                       '''''    '' -$,.~~~%.+~               
                      '''''''''''     }@,.)                  
                     '''''''''                               
                    '''''''                                  
                     '''
[download]

The algorithm to create a half-size shape is to take lines 1,3,5,... and for each line to take chars 1,3,5,... (this is done in sub $R).