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                               CLASSIFICATION FOR PRIMARY PLANETS       
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                  A. Microplanet     B. Mesoplanet          C. Macroplanet       
                  free-form shape    not quite in full      hydrostatic          
                  rigid-body forces  hydrostatic equilib.   equilibrium                                    
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1. Dynamically  | 1A. Not known in | 1B. Not known in     | 1C. Dominant       |
   dominant     | our Solar System | our Solar System     | macroplanet:       |
                | Soter's scenario | Maybe a Vesta-like   | the "big 8"        |
                | maybe elsewhere? | world elsewhere?     | IAU "planet"       |
                |---------------------------------------------------------------
2. Belt or      | 2A. Belt         | 2B. Belt mesoplanet  | 2C. Belt           |
   congregate   | microplanet:     | or subdwarf:         | macroplanet        |
                | 243 Ida,         | 4 Vesta, 2 Pallas?   | 1 Ceres, many TNO's|            
                | 25143 Itokawa    | Vesta differentiated | IAU "dwarf planet" | 
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