Resolution 5A
The IAU therefore resolves that planets and other bodies in our Solar System be defined into three distinct categories in the following way:
 
(1) A planet is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has cleared the neighborhood around its orbit.
(2) A "dwarf planet" is a celestial body that (a) is in orbit around the Sun, (b) has sufficient mass for its self-gravity to overcome rigid body forces so that it assumes a hydrostatic equilibrium (nearly round) shape, and (c) has not cleared the neighborhood around its orbit and (d) is not a satellite.
(3) All other objects orbiting the Sun, excluded satellites, shall be referred to collectively as “Small Solar System Bodies”.
 
Notes:
1. The eight planets are: Mercury, Venus, Earth, Mass, Jupiter, Saturn, Uranus and Neptune.
2. An IAU process will be established to assign borderline objects into either dwarf planet and other categories.
3. The other objects include most of the Solar System asteroids, most Trans-Neptunian objects (TNOs), comets and other small bodies.
 
Resolution 6A
The IAU further resolves:
Pluto is a dwarf planet by the above definition and is recognized as the prototype of a new category of trans-Neptunian objects.