<p>There are CNO's, TNO's (comprised of KBOs, Cubewanos, Plutinos, etc.), SDOs, Detached Objects and OCOs. All of which is a system of object classification based upon clustering of related bodies in orbit beyond Jupiter. <a href="http://upload.wikimedia.org/wikipedia/commons/c/c0/TheTransneptunians_73AU.svg" rel="nofollow">http://upload.wikimedia.org/wikipedia/commons/c/c0/TheTransneptunians_73AU.svg</a></p>