Editing Deimos (moon) (section)

== Physical characteristics ==
[[File:Moon_Phobos_Deimos.png|left|thumb|Size comparison between Phobos, Deimos and the [[Moon]] (right)]]
Deimos is a gray-colored body. Like most bodies of its size, Deimos is highly non-spherical with triaxial dimensions of {{cvt|16.1 x 11.8 x 10.2|km}}, corresponding to a mean diameter of {{cvt|12.5|km|mi}} which makes it about 57% the size of Phobos.<ref name="Ernst2023"/> Deimos is composed of rock rich in carbonaceous material, much like C-type [[asteroid]]s and [[carbonaceous chondrite]] meteorites.<ref>{{Cite web |title=Moons of Mars – Planetary Sciences, Inc. |url=https://planetary-science.org/mars-research/moons-of-mars/ |access-date=10 June 2022 |language=en-US}}</ref> It is [[impact crater|cratered]], but the surface is noticeably smoother than that of Phobos, caused by the partial filling of craters with [[regolith]].{{Citation needed|date=March 2018}} The regolith is highly [[porosity|porous]] and has a radar-estimated density of only {{Val|1.471|u=g/cm3}}.<ref name=Michaelbusch>{{cite journal|last=Busch|first=M. W.|display-authors=etal|title=Arecibo Radar Observations of Phobos and Deimos|journal=Icarus|volume=186|issue=2|year=2007|pages=581–584|doi=10.1016/j.icarus.2006.11.003|bibcode=2007Icar..186..581B}}</ref>

[[Escape velocity]] from Deimos is 5.6&nbsp;m/s.<ref name=NASA>{{cite web|date=30 September 2003|title=Mars: Moons: Deimos|publisher=NASA Solar System Exploration|url=http://solarsystem.nasa.gov/planets/profile.cfm?Object=Mar_Deimos&Display=Facts|access-date=2 December 2013|archive-url=https://web.archive.org/web/20121012044447/http://solarsystem.nasa.gov/planets/profile.cfm?Object=Mar_Deimos&Display=Facts|archive-date=12 October 2012|url-status=dead}}</ref> This velocity could theoretically be achieved by a human performing a vertical jump.<ref>{{Cite web|url=https://www.brunel.ac.uk/~spstnpl/LearningResources/VerticalJumpLab.pdf|title=Vertical Jump Lab|access-date=18 February 2021|archive-date=26 June 2022|archive-url=https://web.archive.org/web/20220626074027/https://www.brunel.ac.uk/~spstnpl/LearningResources/VerticalJumpLab.pdf|url-status=dead}}</ref><ref>{{Cite web|url=https://docs.google.com/document/d/1tuuzrQnTBh7sJmG8ldHrY_chKscKc92y4f_rdI-b_30/edit?usp=sharing&usp=embed_facebook|title=Vertical Jump Velocity Estimation|website=Google Docs}}</ref> The [[apparent magnitude]] of Deimos is 12.45.<ref name=JPLSSD>{{cite web|url=http://ssd.jpl.nasa.gov/?sat_phys_par|publisher=[[Jet Propulsion Laboratory]] (Solar System Dynamics)|title=Planetary Satellite Physical Parameters|date=13 July 2006|access-date=29 January 2008}}</ref>
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=== Named geological features ===
<!--- [[File:SwiftCrater.gif|thumb|200px|The two named craters on Deimos]] --->
Only two geological features on Deimos have been given names. The [[Impact crater|craters]] [[Swift (Deimian crater)|Swift]] and [[Voltaire (crater)|Voltaire]] are named after writers who speculated on the existence of two Martian moons before Phobos and Deimos were discovered.<ref>{{cite web|url=http://planetarynames.wr.usgs.gov/jsp/FeatureTypesData2.jsp?systemID=4&bodyID=21&typeID=9&system=Mars&body=Deimos&type=Crater,craters&sort=AName&show=Fname&show=Lat&show=Long&show=Diam&show=Stat&show=Orig|title=Gazetteer of Planetary Nomenclature|work=[[USGS]] Astrogeology Research Program}}</ref>{{center|'''DEIMOS'''<ref name="Deimos-2009">{{cite web|last=Lakdawalla|first=Emily|title=Mars Reconnaissance Orbiter eye candy: HiRISE images Deimos|url=http://planetary.org/blogs/emily-lakdawalla/2009/1868.html|date=9 March 2009|work=[[Planetary Society]]|access-date=19 August 2013}}</ref>}}
{{DeimosCraterNames}}

{{anchor|Craters on Deimos}}
{| class="wikitable" style="width: 100%"
! style="width:10em" | Craters !! style="width:10em" | Coordinates !! [[Diameter]]<br />(km) !! Approval<br />Year !! class="unsortable" | [[Eponym]] !! class="unsortable" | Ref
|-id="Swift"
| [[Swift (Deimian crater)|Swift]] || {{Coord|12.5|N|1.8|E|globe:deimos_type:landmark|name=Swift}} || align=right | 1 || align=center | 1973 || [[Jonathan Swift]]; Irish writer (1667–1745) || {{WGPSN|5789}}
|-id="Voltaire"
| [[Voltaire (crater)|Voltaire]] || {{Coord|22|N|3.5|W|globe:deimos_type:landmark|name=Voltaire}} || align=right | 1.9 || align=center | 1973 || [[Voltaire]]; French writer (1694–1778) || {{WGPSN|6431}}
|}