Figure 4-9Different Classifications of Solar System Objects Some of the definitions of the different types of objects in the solar system overlap. For example, the largest asteroids are also classified as dwarf planets; various trans-Neptunian objects (TNOs) are asteroids or comets; some comets are satellites of Jupiter; some Kuiper belt objects (KBOs) are satellites of other KBOs. Furthermore, TNOs exist in two groups: KBOs and Oort cloud bodies. Some moons are as large as dwarf planets. ndeed, some moons are as large as small planets!