10425

And last but not least, for other objects in our solar system, see:

http://solarsystem.nasa.gov/feature...ets/comets.html
for comets

http://solarsystem.nasa.gov/feature...meteoroids.html
for meteoroids/meteors/meteorites
(points given for someone who knows the difference)

And
http://solarsystem.nasa.gov/feature.../kbos/kbos.html
for Kuiper Belt Objects, including Quaoar (which may or may not be a 10th planet, it's half the size of Pluto)