Editing List of trans-Neptunian objects (section)

{{Short description|Comprehensive list of objects beyond Neptune}}
{{For|unnumbered bodies|List of unnumbered trans-Neptunian objects}}
{{Use dmy dates|date=March 2020}}
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| [[File:Trans-Neptunians_Size_Albedo_Color.svg|x87px|Albedo size and color]] [[File:Quaoar PRC2002-17e.jpg|x87px|link=50000 Quaoar]]
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| [[File:1994 JR1 close-up from New Horizons.gif|100px|link=15810 Arawn]] [[File:KBO 2014 MU69 HST.jpg|100px|link=486958 Arrokoth]] [[File:Eris and dysnomia2.jpg|100px|link=Eris (dwarf planet)]]
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|[[File:(19308) 1996 TO66 imaged by NTT cut out.jpg|x78px|link=(19308) 1996 TO66]] [[File:20131105 2002 UX25 hst.png|x78px|link=(55637) 2002 UX25]]
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| [[File:1999TC36-Trujillo-HST.png|100px|link=47171 Lempo]] [[File:2007 OR10 and its moon.png|100px|link=225088 Gonggong]] [[File:2002AW197-Spitzer.jpg|100px|link=(55565) 2002 AW197]]
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| [[File:Orcus nasa.jpg|98px|link=90482 Orcus]] [[File:Discovery animation of the TNO 2012 HH2.gif|104px|link=(432949) 2012 HH2]] [[File:2003VS2-mag20.jpg|98px|link=(84922) 2003 VS2]]
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| [[File:Sedna PRC2004-14d.jpg|95px|link=90377 Sedna]] [[File:TX300-2009Nov16-04UT.jpg|110px|link=(55636) 2002 TX300]] [[File:Nh-pluto-in-true-color 2x JPEG-edit-frame.jpg|95px|link=Pluto]]
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| Compilation of 15 imaged [[trans-Neptunian object]]s. The first image compares some of the largest TNOs in terms of size, [[Trans-Neptunian object#Colours|color]] and [[Astronomical albedo|albedo]].
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This is a list of [[trans-Neptunian objects]] (TNOs), which are [[minor planet]]s in the [[Solar System]] that [[orbit]] the [[Sun]] at a greater distance on average than [[Neptune]], that is, their orbit has a [[semi-major axis]] greater than 30.1 [[astronomical unit]]s (AU). The [[Kuiper belt]], [[scattered disk]], and [[Oort cloud]] are three conventional divisions of this volume of space.<ref name="Remo-2007" />{{#tag:ref|The treatments vary and a few objects such as {{dp|Sedna}} do not fit easily into any division. The literature is inconsistent in the use of the phrases "scattered disc" and "Kuiper belt". For some, they are distinct populations; for others, the scattered disk is part of the Kuiper belt, in which case the low-eccentricity population is called the "classical Kuiper belt". Authors may even switch between these two uses in a single publication.<ref>Weissman and Johnson, 2007, ''Encyclopedia of the solar system'', footnote p. 584</ref> This lists shows all minor planets with a semi-major axis larger than 30.1&nbsp;AU, irrespective whether they are dynamically categorized as TNOs (resonant and classical), SDOs, centaurs or damocloids|group="nb"|name="KB"}} {{As of|2022|04}}, the [[List of minor planets#Main index|catalog of minor planets]] contains [[#List|901 numbered TNOs]]. In addition, there are more than [[List of unnumbered trans-Neptunian objects|3,000 unnumbered TNOs]], which have been observed since 1993.<ref name="MPC-List-TNOs" /><ref name="MPC-List-Cen-and-SDO" /><ref name="TNO-list-Johnstons" />

This list consists of all types of TNO subgroups: [[classical Kuiper belt object]]s, also known as "cubewanos", the [[resonant trans-Neptunian object]]s with their [[Resonant trans-Neptunian object#2:3|main]] and [[Resonant trans-Neptunian object#Other resonances|higher-order]] resonant subgroups, the [[scattered disc object]]s (SDOs), and the [[extreme trans-Neptunian object]]s including the [[Extreme scattered disc object|ESDO]]s, [[Extreme detached disc object|EDDO]]s, and [[sednoid]]s, which have a semi-major axis of at least 150&nbsp;[[Astronomical unit|AU]] and a [[perihelion]] (closest approach to the Sun) greater than that of Neptune.<ref name="de-la-Fuente-2014" /> The list also contains several [[centaur (minor planet)|centaurs]], if the object's orbit has a sufficiently large semi-major axis (a). Centaurs have unstable orbits in which the perihelion (q) is well inside of Neptune's orbit but the farthest point ([[aphelion]], Q) 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 [[plutino]]s (another such resonant subgroup are the [[twotinos]]). It took more than 60 years to discover a second TNO, [[15760 Albion|Albion]] ([[Minor planet provisional designation|provisionally]] known as [[#15760|{{mp|1992 QB|1}}]]), in 1992. The largest known trans-Neptunian objects are Pluto and {{dp|Eris}}, followed by {{dp|Haumea}}, {{dp|Makemake}}, {{dp|Gonggong}}, {{dp|Quaoar}}, {{dp|Sedna}}, and {{dp|Orcus}}, all of them being officially recognized as [[dwarf planet]]s by the [[International Astronomical Union|IAU]] except for Gonggong, Sedna, and Orcus. There are also many [[possible dwarf planet]]s, such as {{dp|Salacia}}, {{mp|(307261) 2002 MS|4}}, {{dp|Varda}}, {{dp|Ixion}}, and {{dp|Varuna}}.  Most TNOs have low [[Astronomical albedo|albedo]]s typically around 0.09. Their [[Distant object spectral type|color]] varies from blue-grey to very red (classes BB, BR, IR and RR). The following list also gives an object's full [[Minor planet designation|designation]], mean-diameter (D), and discovery circumstances (date, [[LOMPD|discoverer]] and [[IAU code|discovery site]]), as well as its orbital [[Orbital inclination|inclination]] (''i'') and [[Orbital eccentricity|eccentricity]] (e).