Editing Atira asteroid (section)

==Related asteroid groups==
===ꞌAylóꞌchaxnim asteroids===
ꞌAylóꞌchaxnim asteroids, which had been provisionally nicknamed "Vatira" asteroids before the first was discovered,{{efn|The nickname "Vatira" combined "Venus" with "Atira".<ref name=Greenstreet2012/>}} are a subclass of Atiras that orbit entirely interior to the orbit of [[Venus]], aka 0.718 AU.<ref name=Bolin/> Despite their orbits placing them at a significant distance from Earth, they are still classified as near-Earth objects.<ref>{{cite web|title= JPL Small-Body Database Browser: 2020 AV2|url=https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3985571|website=[[Jet Propulsion Laboratory]]|publisher=[[NASA]]|access-date= 9 January 2020|archive-url=https://web.archive.org/web/20200111003446/https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=3985571|archive-date=11 January 2020|url-status=live}}</ref> Observations suggest that ꞌAylóꞌchaxnim asteroids frequently have their orbits altered into Atira asteroids and vice versa.<ref>{{cite journal|url=https://academic.oup.com/mnras/article-abstract/517/4/5921/6815743?login=false|title=The orbital evolution of Atira asteroids|journal=[[Monthly Notices of the Royal Astronomical Society]]|last1=Lai|first1=H.T.|last2=Ip|first2=W.H.|date=4 December 2022|accessdate=February 9, 2023|volume=517|issue=4|pages=5921–5929|doi=10.1093/mnras/stac2991|doi-access=free |arxiv=2210.09652}}</ref>

First formally theorised to exist by William F. Bottke and Gianluca Masi in 2002 and 2003,<ref name=Bottke2002>{{cite journal |last1=Bottke |first1=William F. |display-authors=et al|date=April 2002 |title=Debiased Orbital and Absolute Magnitude Distribution of the Near-Earth Objects
 |journal=[[Icarus (journal)|Icarus]] |volume=156 |issue=2 |pages=399–433 |doi= 10.1006/icar.2001.6788 |doi-access=free |bibcode=2002Icar..156..399B }}</ref><ref name=Masi2003>{{cite journal |last1=Masi |first1=Gianluca |date=June 2003 |title=Searching for inner-Earth objects: a possible ground-based approach
 |journal=[[Icarus (journal)|Icarus]] |volume=163 |issue=2 |pages=389–397 |doi= 10.1016/S0019-1035(03)00082-4 |doi-access=free |bibcode=2003Icar..163..389M }}</ref> the first and to date only such asteroid found is [[594913 ꞌAylóꞌchaxnim]],<ref name=vt20200109>{{cite news |title=2020 AV2, the first intervenusian asteroid ever discovered: an image – 08 Jan. 2020 |url=https://www.virtualtelescope.eu/2020/01/09/2020-av2-the-first-intervenusian-asteroid-ever-discovered-an-mage-08-jan-2020/ |first=Gianluca|last=Masi |publisher=Virtual Telescope Project |date=9 January 2020 |access-date=9 January 2020}}</ref><ref name="Popescuetal2020"/> which was discovered on 4 January 2020 by the [[Zwicky Transient Facility]]. As the archetype, it subsequently gave its name to the class.<ref name=Bolin>{{cite journal |last1=Bolin |first1=Bryce T. |display-authors=et al|date=November 2022 |title=The discovery and characterization of (594913) 'Ayló'chaxnim, a kilometre sized asteroid inside the orbit of Venus |url=https://authors.library.caltech.edu/records/4fewd-rff56/files/slac089.pdf?download=1 |journal=[[Monthly Notices of the Royal Astronomical Society|Monthly Notices of the Royal Astronomical Society: Letters]] |volume=517 |issue=1 |pages=L49–L54 |doi=10.1093/mnrasl/slac089 |access-date=1 October 2022|doi-access=free }}</ref> It has an aphelion of only 0.656 AU, the smallest of any known asteroid.<ref name="jpl-search-by-smallest-aphelion" /><ref name=FuenteMarcos20190611/>

===Vulcanoids===
{{main|Vulcanoid}}
No asteroids have yet been discovered to orbit entirely inside the orbit of [[Mercury (planet)|Mercury]] (q = 0.307 AU). Such hypothetical asteroids would likely be termed [[vulcanoid asteroid|vulcanoids]], although the term often refers to asteroids which more specifically have remained in the intra-Mercurian region over the age of the [[Solar System]].<ref name=Greenstreet2012/>