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List of unnumbered trans-Neptunian objects
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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.[2][3] 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[update], there are 3,141 unnumbered objects, defined here as minor planets with a semi-major axis larger than 30.1 AU (Neptune's average orbital distance from the Sun).[a]
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The list also contains information from "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.[1] Members of the extreme trans-Neptunian objects (ESDOs, EDDOs and sednoids) – with a semi-major axis greater than 150 AU and perihelion greater than 30 AU – are also identified.
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Statistics
- Numbered TNOs: 901 obj. (22.3%)
- Unnumbered TNOs: 3,141 obj. (77.7%)
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List
1993
1994
1995
1996
1997
1998
1999–2007
- List of unnumbered trans-Neptunian objects: 1999
- List of unnumbered trans-Neptunian objects: 2000
- List of unnumbered trans-Neptunian objects: 2001
- List of unnumbered trans-Neptunian objects: 2002
- List of unnumbered trans-Neptunian objects: 2003
- List of unnumbered trans-Neptunian objects: 2004
- List of unnumbered trans-Neptunian objects: 2005
- List of unnumbered trans-Neptunian objects: 2006
- List of unnumbered trans-Neptunian objects: 2007
2008
2009–2018
- List of unnumbered trans-Neptunian objects: 2009
- List of unnumbered trans-Neptunian objects: 2010
- List of unnumbered trans-Neptunian objects: 2011
- List of unnumbered trans-Neptunian objects: 2012
- List of unnumbered trans-Neptunian objects: 2013
- List of unnumbered trans-Neptunian objects: 2014
- List of unnumbered trans-Neptunian objects: 2015
- List of unnumbered trans-Neptunian objects: 2016
- List of unnumbered trans-Neptunian objects: 2017
- List of unnumbered trans-Neptunian objects: 2018
2019
2020
2021
2022
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2023
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Ignored objects
Summarize
Perspective
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]
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See also
Notes
- 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).
References
External links
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