This is a list of trans-Neptunian objects, which are minor planets in the Solar System that orbitthe Sun at a greater distance on average than Neptune, that is, their orbit has a semi-major axisgreater than 30.1 astronomical units. The Kuiper belt, scattered disk, and Oort cloud are three conventional divisions of this volume of space., the catalog of minor planets contains [|678 numbered TNOs]. In addition, there are more than 2,000 unnumbered TNOs, which have been observed since 1993. This list consists of all types of TNO subgroups: classical Kuiper belt objects, also known as "cubewanos", the resonant trans-Neptunian objects with their and higher-order resonant subgroups, the scattered disc objects, and the extreme trans-Neptunian objects including the ESDOs, EDDOs, and sednoids, which have a semi-major axis of at least 150 AU and a perihelion greater than that of Neptune. The list also contains several centaurs, if the object's orbit has a sufficiently large semi-major axis. Centaurs have unstable orbits in which the perihelion is well inside of Neptune's orbit but the farthest point is very distant. The first TNO to be discovered was Pluto in 1930. It became the namesake of a larger group of resonant objects called plutinos. It took more than 60 years to discover a second TNO, Albion, in 1992. The largest known trans-Neptunian objects are Pluto and, followed by,, and. Most TNOs have low albedos typically around 0.09. Their color varies from blue-grey to very red. The following list also gives an object's full designation, mean-diameter, and discovery circumstances, as well as its orbital inclination and eccentricity.
List
This list includes all numbered trans-Neptunian objects with a semi-major axis greater than 30.1 astronomical units, Neptune's average orbital distance from the Sun. The data is sourced from MPC's "List of Trans Neptunian Objects" and "List Of Centaurs and Scattered-Disk Objects", completed with remarks and information from Johnston's Archive.
Unnumbered TNOs
There are more than 2,000 unnumbered trans-Neptunian objects, defined here as minor planets with a semi-major axis larger than 30.1 AU. The data is sourced from MPC's "List of Trans Neptunian Objects" and "List Of Centaurs and Scattered-Disk Objects", completed with information from Johnston's Archive. For the list of numbered TNOs, see .
Trans-Neptunian objects colorized by their orbital subclass and plotted in the orbital parameter space. The plot for the entire region contains 1418 objects including plutinos, twotinos, other resonant objects, cubewanos, inner and outer classical objects, SDOs, sednoids, centaurs and other TNOs.
