An object that orbits Neptune would be called a MOON of Neptune, if it is large enough.
pluto
pluto
There are many trans-Neptunian objects (over 570,000 of them). Some of them are:-PlutoHaumeaMakemakeEris
pluto
It crosses another planet's orbital path. Since Pluto is not a planet, it does not matter. Comets always pass other planets' orbital paths. They are still called planets. Countless asteriods and comets orbits the sun and crosses every planets orbital path. Pluto is somewhat a part of them.There is something circular about the logic in the above answer; see discussion.Probably a stronger answer is the fact that even though a section of the orbit of Pluto comes within the orbit of Neptune, the harmonic relationship between the two bodies is such that they can never collide, barring some catastrophic event that alters one or both orbits. Neptune and Pluto are locked in this harmonic relationship where for every three orbits of Neptune there is exactly two orbits of Pluto. So Pluto cannot be seen as an object that Neptune must clear. Pluto is more like an unusual moon of Neptune.
pluto
An aphelia is the point in the orbit of a celestial body at which it is furthest from the body it orbits.
Asteroid - a small, rocky body that orbits the Sun.
The body in the solar system with an orbit so eccentric that it crosses the orbit of Neptune is called "Eris." Eris is a dwarf planet located in the scattered disc region of the Kuiper Belt and has an eccentric orbit that brings it closer to the Sun than Neptune at certain points in its orbit. Its discovery in 2005 contributed to the reclassification of Pluto as a dwarf planet.
Orbits a star and has enough mass to have cleared its orbit of debris.
They aren't ! A satellite orbits another body.
Astronomers began searching for Planet X to explain discrepancies in the orbits of Uranus and Neptune. Observations indicated the presence of an unknown massive celestial body affecting the orbits of these planets.