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The Kuiper belt (/ ˈ k aɪ p ər / KY-pər) [1] is a circumstellar disc in the outer Solar System, extending from the orbit of Neptune at 30 astronomical units (AU) to approximately 50 AU from the Sun. [2] It is similar to the asteroid belt, but is far larger—20 times as wide and 20–200 times as massive.
A classical Kuiper belt object, also called a cubewano (/ ˌ k juː b iː ˈ w ʌ n oʊ / "QB1-o"), [a] is a low-eccentricity Kuiper belt object (KBO) that orbits beyond Neptune and is not controlled by an orbital resonance with Neptune. Cubewanos have orbits with semi-major axes in the 40–50 AU range and, unlike Pluto, do not cross Neptune's ...
Since the year 2000, a number of Kuiper belt objects (KBOs) with diameters of between 500 and 1500 km (more than half that of Pluto) have been discovered. 50000 Quaoar, a classical KBO discovered in 2002, is over 1000 km across. Makemake and Haumea, both announced on 29 July 2005, are larger still.
This list consists of all types of TNO subgroups: classical Kuiper belt objects, also known as "cubewanos", the resonant trans-Neptunian objects with their main and higher-order resonant subgroups, the scattered disc objects (SDOs), and the extreme trans-Neptunian objects including the ESDOs, EDDOs, and sednoids, which have a semi-major axis of ...
Ceres, 2.8 AU in the asteroid belt; Orcus 39.4 AU, Trans-Neptunian-Kuiper belt object; Pluto 39 AU, Kuiper belt (a planet until 2006) Haumea 43 AU, Kuiper belt; Makemake 45.8 AU, Kuiper belt; Eris 95.6 AU, Kuiper belt; Gonggong Scattered disc object, 34 to 101 AU; Quaoar Kuiper belt object, 41.9 to 45.4 AU; Sedna 76 to 506 AU
Over one thousand bodies were found in the Kuiper belt orbiting between about 30 and 50 AU from the Sun in the twenty years after finding 15760 Albion. This revealed a vast belt of bodies, more than just Pluto and Albion themselves. [17] [18] By 2018, over 2000 Kuiper belt objects were discovered. [18]
Located beyond the orbit of Neptune, 1998 WW 31 is a non-resonant classical Kuiper belt object (cubewano) of the so-called hot population, which have higher inclinations than those of the cold population. [5] [12] It orbits the Sun at a distance of 40.4–48.5 AU once every 297 years (108,345 days; semi-major axis of 44.48 AU).
15810 Arawn (provisional designation 1994 JR 1) is a trans-Neptunian object (TNO) from the inner regions of the Kuiper belt, approximately 133 kilometres (83 mi) in diameter. It belongs to the plutinos, the most populous class of resonant TNOs.