pluto
An object that orbits Neptune would be called a MOON of Neptune, if it is large enough.
pluto
There are many trans-Neptunian objects (over 570,000 of them). Some of them are:-PlutoHaumeaMakemakeEris
pluto
Asteroid - a small, rocky body that orbits the Sun.
The definition of a "satellite" is anything that orbits a larger body. Moons are satellites (natural satellites), and Neptune has 13 known moons.
Well by large bodies you mean planets, so its Mercury,venus, saturn, earth uranius,neptune,mars,jupiter.
The Moon is the planetary body that orbits the Earth.
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.
It sounds like you are describing an asteroid, which is a small rocky body that orbits the sun. Asteroids are most commonly found in the asteroid belt between Mars and Jupiter, but they can exist in various other regions of the solar system as well.
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.
The small body of the moon that orbits a planet is called a satellite.