A Neptune-crosser is a minor planet whose orbit crosses that of Neptune. The dwarf planet Pluto is the most massive example of this class of object. The known numbered Neptune-crossers (as of 2005) are:

Notes: ‡ outer-grazer † 134340 Pluto was known at this time but not numbered

Inner-grazer: middle, top;
Outer-grazer: middle, bottom;
Crosser: right, bottom;
Co-orbital (Neptune trojan): right, top

See also