Editing Classical Kuiper belt object (section)

{{Short description|Kuiper belt object, not controlled by an orbital resonance with Neptune}}
[[File:UltimaThule_CA06_color_20190516.png|thumb|[[486958 Arrokoth]], the first classical Kuiper belt object [[List of minor planets visited by spacecraft|visited by a spacecraft]].]]
[[File:Cubewanos.png|thumb|The orbits of various cubewanos compared to the orbit of [[Neptune]] (blue) and [[Pluto]] (pink)]]
{{TNO}}

A '''classical Kuiper belt object''', also called a '''cubewano''' ({{IPAc-en|ˌ|k|juː|b|iː|ˈ|w|ʌ|n|oʊ}} "QB1-o"),{{efn|Somewhat old-fashioned, but "cubewano" is still used by the Minor Planet Center for their list of Distant Minor Planets.<ref>{{cite web |url=http://www.minorplanetcenter.org/mpec/K10/K10S44.html |title=Distant Minor Planets}}</ref>}} is a low-eccentricity [[Kuiper belt]] object (KBO) that [[orbit]]s beyond [[Neptune]] and is not controlled by an [[Resonant trans-Neptunian object|orbital resonance with Neptune]]. Cubewanos have orbits with [[Semi-major axis|semi-major axes]] in the 40–50&nbsp;[[astronomical unit|AU]] range and, unlike [[Pluto]], do not cross Neptune's orbit. That is, they have low-[[Orbital eccentricity|eccentricity]] and sometimes low-[[Orbital inclination|inclination]] orbits like the classical planets.

The name "cubewano" derives from the first [[trans-Neptunian object]] (TNO) found after Pluto and [[Charon (moon)|Charon]]: [[15760 Albion]], which until January 2018 had only the provisional designation (15760) {{mp|1992 QB|1}}.<ref>{{cite web |url=http://www2.ess.ucla.edu/~jewitt/kb/def_classical.html |title=Classical Kuiper Belt Objects |author-link=David Jewitt |first=David |last=Jewitt |publisher=UCLA |access-date=1 July 2013}}</ref> Similar objects found later were often called "QB1-os", or "cubewanos", after this object, though the term "classical" is much more frequently used in the scientific literature.

Objects identified as cubewanos include:
* [[15760 Albion]]<ref name=K10B62 /> (aka {{mp|1992 QB|1}} and gave rise to term 'Cubewano')
* [[Makemake|136472 Makemake]], the largest known cubewano{{Citation needed|reason=This conflicts with the main page for Makemake, which claims that Makemake is the second largest cubewano.|date=January 2024}} and a [[dwarf planet]]<ref name=K10B62 /> 
* [[50000 Quaoar]] and [[20000 Varuna]], each considered the largest TNO at the time of discovery<ref name=K10B62 /> 
* [[19521 Chaos]], [[58534 Logos]], [[53311 Deucalion]], [[66652 Borasisi]], [[88611 Teharonhiawako]]
* {{mpl|(33001) 1997 CU|29}}, {{mpl|(55636) 2002 TX|300}}, {{mpl|(55565) 2002 AW|197}}, {{mpl|(55637) 2002 UX|25}}
* [[486958 Arrokoth]]

[[Haumea|136108 Haumea]] was provisionally listed as a cubewano by the [[Minor Planet Center]] in 2006,<ref name=K06X45>{{cite web |date=2006-12-12 |title=MPEC 2006-X45: Distant Minor Planets |url=https://minorplanetcenter.net//mpec/K06/K06X45.html |access-date=2008-10-03 |df=dmy-all |publisher=IAU Minor Planet Center & Tamkin Foundation Computer Network}}</ref> but was later found to be in a [[resonant trans-Neptunian object|resonant]] orbit.<ref name=K10B62>
{{cite web |date=2010-01-30 |title=MPEC 2010-B62: Distant Minor Planets (2010 FEB. 13.0 TT) |author=Brian G. Marsden |department=IAU Minor Planet Center |publisher=Harvard-Smithsonian Center for Astrophysics |url=http://www.minorplanetcenter.org/mpec/K10/K10B62.html |archive-url=https://archive.today/20120904012403/http://www.minorplanetcenter.org/mpec/K10/K10B62.html |url-status=dead |archive-date=2012-09-04 |df=dmy-all |access-date=2010-07-26}}</ref>