Distribution of 3,590 listed TNO objects (with a > 30.1 AU, including candidates) by subclass from Johnston's Archive (hover)[1]
This is a list of unnumbered trans-Neptunian objects (TNOs) first observed since 1993 and grouped by the year of in which they received a temporary name or a permanent one.
Statistics
100
200
300
400
500
600
700
800
'92
'94
'96
'98
'00
'02
'04
'06
'08
'10
'12
'14
'16
'18
'20
'22
TNOs by year of principle designation since 1992 (objects with a < 30.1 AU excluded). As of April 2022[update], there are 3,141 unnumbered TNOs and 783 numbered TNOs (Pluto from 1930 is not shown)[2][3]
The Minor Planet Center does not include the following 111 objects with a semi-major axis larger than that of Neptune in its respective lists (see § top).[2][3][a] The data is sourced from the List of Known Trans-Neptunian Objects at Johnston's Archive.[1]
↑According to Johnston's Archive,[1] there are 50+ objects with a semi-major axis larger than 30.1 AU that are excluded from the two MPC sources. These ignored objects are the damocloids and the Neptune trojans, as well as three unusual objects 2003 UY283 (MPC/JPL), 2004 CM111 (MPC/JPL) and 2015 RL277 (MPC/JPL).