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 209 Planetary Satellites (including the moon and satellites of Pluto) 3,729 Comets:     501  numbered (includes fragments)   3,228  unnumbered (includes fragments) 1,090,423 Asteroids:     552,450  numbered   537,973  unnumbered

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