Heliocentric distances 6 Solar system 6 Asteroids 4 Color 4 Color distribution 4 Cometary activity 4 Dynamical evolution 4 Equations of motion 4 Kuiper belt: general 4 Kuiper belt: generals 4 Minor bodies 4 Minor planets 4 Numerical integrations 4 Orbital evolutions 4 Physical process 4 Population statistics 4 Reflection spectra 4 Short periods 4 Statistical differences 4 Surface colors 4 Surface properties 4 Time-scales 4 Trans-neptunian objects 4 asteroids: general 4 minor planets 4 Coma 2 Comets 2 Complex morphology 2 Continuous replenishment 2 Dust 2