New asteroids are discovered on an almost daily basis, while new comets and new planetary satellites are discovered much less often. The number of planets is not likely to change unless the definition of a planet is changed.

The following table shows the total known bodies in each group as of today.

8 Planets 177 Planetary Satellites (including the moon and satellites of Pluto) 3,211 Comets:     351  numbered (includes fragments)   2,860  unnumbered (includes fragments) 615,045 Asteroids:     363,009  numbered   252,036  unnumbered

Discovery circumstances are available for most bodies excluding unnumbered asteroids and comets.