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About: List of unnumbered trans-Neptunian objects     Goto   Sponge   NotDistinct   Permalink

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This is a list of unnumbered trans-Neptunian objects (TNOs) first observed since 1993 and grouped by the year of principal provisional designation. The data is sourced from the Minor Planet Center's (MPC) List of Trans Neptunian Objects and List Of Centaurs and Scattered-Disk Objects. These objects will eventually be numbered as secured discoveries with an official discoverer determined by the MPC. Until then, additional observations are needed to sufficiently decrease an object's orbital uncertainty. As of April 2022, there are , defined here as minor planets with a semi-major axis larger than 30.1 AU (Neptune's average orbital distance from the Sun).