trans-Neptunian
Adjective
Meaning
trans-Neptunian (not comparable)
Lying beyond the orbit of the planet Neptune (especially with regard to planetary bodies).
Planet X is a legendary trans-Neptunian world.
Examples
All other asteroids are now classified as small Solar System bodies along with comets, centaurs, and the smaller trans-Neptunian objects.
He calculated, based on the fact that four comets possessed aphelia at around 100 AU and a further six with aphelia clustered at around 300 AU, the orbital elements of a pair of hypothetical trans-Neptunian planets.
Discovery of other trans-Neptunian objects After Pluto's discovery, American astronomer Clyde Tombaugh continued searching for some years for similar objects, but found none.
Littmann (1990), p. 204. Today, most astronomers agree that Planet X, as Lowell defined it, does not exist. citation Discovery of further trans-Neptunian objects File:EightTNOs.
However, the terms are normally used to refer to objects free from significant perturbation from Neptune, thereby excluding KBOs in orbital resonance with Neptune ( resonant trans-Neptunian objects ).
In 1900 and 1901, Harvard College Observatory director William Henry Pickering led two searches for trans-Neptunian planets.