Astrophysics (index)about

trans-Neptunian object

(TNO, trans-Neptune object)
(minor planet beyond Neptune)

A trans-Neptunian object (TNO or trans-Neptune object) is a minor planet that orbits beyond Neptune, specifically, its orbit's semi-major axis. Pluto now falls in this class.

An extreme trans-Neptunian object (ETNO or extreme trans-Neptune object) is a TNO with semi-major axis beyond 150 AU.

(planets,solar system,object type)

Referenced by:
binary minor planet (BMP)
New Horizons (NF1)
Outer Solar System Origins Survey (OSSOS)
solar system