Object Aperture: 13 pixels                                                    
                                                                              
Inner Annulus: 25 pixels                                                      
                                                                              
Outer Annulus: 60 pixels                                                      
                                                                              
                                                                              
Frame 26: Guides 3 and 4 added to make up for loss of Guide 1                 
                                                                              
Frame 27: Guide 1 drops off chip                                              
                                                                              
Frame 36: Guide 2 becomes too dim to measure accurately;                      
          from this point on, only guides 3 and 4 are used                    
                                                                              
Frames 49-50: Tempel overlaps nearby star