1 b/c is assumed value.                                                                                     
 2 Ellipsoidal model represents a mean value of two significantly different solutions.                       
 3 Different spin axis solutions for different apparitions was interpreted as indicating a precessing motion.
 4 Symmetric solution obtained, but quantitative specification is missing.                                   
 5 Consistency check of previous spin vector determinations.                                                 
 6 Based on a radar experiment giving constraints on the aspect angle at the time of observation.            
 7 Based on two radar experiments giving an aspect circle at the time of observation.                        
 8 Modelled as a cylinder with hemispherical ends.                                                           
 9 Modelled as a cylinder cut out of a sphere.                                                               
10 Complex shape.                                                                                            
11 Modelled as a Jacobi ellipsoid.                                                                           
12 Modelled as 8 octants of ellipsoids put together to form a continous surface.                             
13 Modelled as an ellipsoid with a piece removed by a plane cut.                                             
14 Modelled as an irregular polyhedron.                                                                      
15 Modelled as a sphere with free albedo facets.                                                             
16 Results show that there is no significant albedo variegation.                                             
17 Modelled using a spherical harmonics expansion of the shape.                                              
18 Albedo model with a single big spot.                                                                      
19 Modelled as a sphere with 2 dark regions.                                                                 
20 Speckle images showing albedo variegation.                                                                
21 Bi-axial ellipsoid (a/b=1.15) with a flat region just off the South Pole.                                 
22 Also presented in Ful+91.                                                                                 
23 Also presented in English in Lup+90.                                                                      
24 Also presented in Mi+90c.                                                                                 
25 Also presented in Det+94.                                                                                 
26 Detailed model from space images.                                                                         
27 Also presented in Mic94.                                                                                  
28 The spin axis is not aligned with the c-axis of the ellipsoid model.                                      
29 Dynamically Equivalent Equal Volume Ellipsoid (DEEVE) adopted for the complex shape.                      
30 Complex radar model.                                                                                      
31 Convex shape obtained with lightcurve inversion.                                                          
32 Pole coordinates calculated for J2000.                                                                    
33 Values for pole coordinates are 17.238, 11.351                                                            
34 Also presented in Bla+98.                                                                                 
35 Model requires albedo variegation                                                                         
36 Suggested albedo variegations of 4%                                                                       
37 a/b and b/c are assumed values.                                                                           
38 a/b is an assumed value.                                                                                  
39 Sidereal period is a mean value of two significantly different solutions.                                 
40 a/b is an upper limit.