Classical Kuiper belt object references on wikipedia
Classical_Kuiper_belt_object In astronomy a classical Kuiper Belt object, also called a cubewano, is a Kuiper belt object (KBO) that orbits beyond Neptune and is not controlled by an orbital resonance with the giant planet. Cubewanos have semi-major axes in the 40-50 AU range and, unlike Pluto, do not cross Neptune’s orbit.The name "cubewano" derives from the first trans-Neptunian object (TNO) found after Pluto and Charon, . Later similar objects were called "QB1-o's", or "cubewanos".