List of unnumbered trans-Neptunian objects



This is a list of unnumbered trans-Neptunian objects first observed since 1993 and grouped by the year of principal provisional designation. The data is sourced from the Minor Planet Center's 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., there are [|2,737 unnumbered objects], defined here as minor planets with a semi-major axis larger than 30.1 AU.
The list also contains information from the "Johnston's Archive", such as an object's diameter, its dynamical class and binary status with the satellite's diameter, as well as its albedo, spectral taxonomy and B–R color index. Members of the extreme trans-Neptunian objects – with a semi-major axis greater than 150 AU and perihelion greater than 30 AU – are also identified.

Statistics

List

1993

1994

1995

1996

1997

1998

1999–2007

  • 2008

2009–2016

  • 2017

2018

2019

2020

Ignored objects

The Minor Planet Center does not include the following 68 objects with a semi-major axis larger than that of Neptune in its respective lists . The data is sourced from the List of Known Trans-Neptunian Objects at Johnston's Archive.
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