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class="minerva__tab-container"> <li class="minerva__tab selected"> <a class="minerva__tab-text" href="/wiki/Triton_(moon)" rel="" data-event-name="tabs.subject">Article</a> </li> <li class="minerva__tab "> <a class="minerva__tab-text" href="/wiki/Talk:Triton_(moon)" rel="discussion" data-event-name="tabs.talk">Talk</a> </li> </ul> <nav class="page-actions-menu"> <ul id="p-views" class="page-actions-menu__list"> <li id="language-selector" class="page-actions-menu__list-item"> <a role="button" href="#p-lang" data-mw="interface" data-event-name="menu.languages" title="Language" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet language-selector"> Language </a> </li> <li id="page-actions-watch" class="page-actions-menu__list-item"> <a role="button" id="ca-watch" href="/w/index.php?title=Special:UserLogin&returnto=Triton+%28moon%29" data-event-name="menu.watch" class="cdx-button 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id="mf-section-0"> <style data-mw-deduplicate="TemplateStyles:r1236090951">.mw-parser-output .hatnote{font-style:italic}.mw-parser-output div.hatnote{padding-left:1.6em;margin-bottom:0.5em}.mw-parser-output .hatnote i{font-style:normal}.mw-parser-output .hatnote+link+.hatnote{margin-top:-0.5em}@media print{body.ns-0 .mw-parser-output .hatnote{display:none!important}}</style><div role="note" class="hatnote navigation-not-searchable">Not to be confused with <a href="/wiki/Titan_(moon)" title="Titan (moon)">Titan (moon)</a>.</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style>Triton is the largest <a href="/wiki/Natural_satellite" title="Natural satellite">natural satellite</a> of the <a href="/wiki/Planet" title="Planet">planet</a> <a href="/wiki/Neptune" title="Neptune">Neptune</a>. It is the only moon of Neptune massive enough to be <a href="/wiki/List_of_gravitationally_rounded_objects_of_the_Solar_System" title="List of gravitationally rounded objects of the Solar System">rounded under its own gravity</a> and hosts a <a href="/wiki/Atmosphere_of_Triton" title="Atmosphere of Triton">thin, hazy atmosphere</a>. Triton orbits Neptune in a <a href="/wiki/Retrograde_orbit" class="mw-redirect" title="Retrograde orbit">retrograde orbit</a>—revolving in the opposite direction to the parent planet's rotation—the only large moon in the <a href="/wiki/Solar_System" title="Solar System">Solar System</a> to do so.<a href="#cite_note-NYT-20141105-DO-3">[3]</a><a href="#cite_note-NYT-20141018-KC-19">[13]</a> Triton is thought to have once been a <a href="/wiki/Dwarf_planet" title="Dwarf planet">dwarf planet</a> from the <a href="/wiki/Kuiper_belt" title="Kuiper belt">Kuiper belt</a>, <a href="/wiki/Gravitational_capture" title="Gravitational capture">captured</a> into Neptune's orbit by the latter's <a href="/wiki/Gravity" title="Gravity">gravity</a>.<a href="#cite_note-Agnor06-20">[14]</a> <table class="infobox"><caption class="infobox-title fn org">Triton</caption><tbody><tr><td colspan="2" class="infobox-image"><a href="/wiki/File:Triton-usgs23-with-frame.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Triton-usgs23-with-frame.jpg/290px-Triton-usgs23-with-frame.jpg" decoding="async" width="290" height="290" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/98/Triton-usgs23-with-frame.jpg/435px-Triton-usgs23-with-frame.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/98/Triton-usgs23-with-frame.jpg/580px-Triton-usgs23-with-frame.jpg 2x" data-file-width="5000" data-file-height="5000"></a><div class="infobox-caption">A black-and-white mosaic of Triton, constructed from Voyager 2 imagery. Triton's massive south polar cap dominates most of the image, with cryovolcanic features such as <a href="/wiki/Leviathan_Patera" title="Leviathan Patera">Leviathan Patera</a> located left of center</div></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF">Discovery</th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/List_of_minor_planet_discoverers" title="List of minor planet discoverers">Discovered by</a></th><td class="infobox-data"><a href="/wiki/William_Lassell" title="William Lassell">William Lassell</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;">Discovery date</th><td class="infobox-data">October 10, 1846</td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF">Designations</th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Designation</div></th><td class="infobox-data">Neptune I</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;">Pronunciation</th><td class="infobox-data"><a href="/wiki/Help:IPA/English" title="Help:IPA/English">/ˈtraɪtən/</a> (<a href="/wiki/Help:Pronunciation_respelling_key" title="Help:Pronunciation respelling key">TRY-tən</a>)</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Named after</div></th><td class="infobox-data"><a href="/wiki/Triton_(mythology)" title="Triton (mythology)">Τρίτων</a> Trītōn</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/List_of_adjectivals_and_demonyms_of_astronomical_bodies" title="List of adjectivals and demonyms of astronomical bodies">Adjectives</a></th><td class="infobox-data">Tritonian (<a href="/wiki/Help:IPA/English" title="Help:IPA/English">/traɪˈtoʊniən/</a>)<a href="#cite_note-1">[1]</a></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF"><a href="/wiki/Osculating_orbit" title="Osculating orbit">Orbital characteristics</a></th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Semi-major_and_semi-minor_axes" title="Semi-major and semi-minor axes">Semi-major axis</a></div></th><td class="infobox-data">354,759 km</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Orbital_eccentricity" title="Orbital eccentricity">Eccentricity</a></th><td class="infobox-data">0.000016<a href="#cite_note-neptuniansatfact-2">[2]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Orbital_period" title="Orbital period">Orbital period (sidereal)</a></div></th><td class="infobox-data">5.876854 d (<a href="/wiki/Retrograde_and_direct_motion" class="mw-redirect" title="Retrograde and direct motion">retrograde</a>)<a href="#cite_note-neptuniansatfact-2">[2]</a><a href="#cite_note-NYT-20141105-DO-3">[3]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Average <a href="/wiki/Orbital_speed" title="Orbital speed">orbital speed</a></div></th><td class="infobox-data">4.39 km/s<a href="#cite_note-calculated-4">[a]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Orbital_inclination" title="Orbital inclination">Inclination</a></th><td class="infobox-data">129.812° (to the <a href="/wiki/Ecliptic" title="Ecliptic">ecliptic</a>) 156.885° (to Neptune's equator)<a href="#cite_note-JPL-SSD-Neptune-5">[4]</a><a href="#cite_note-Jacobson2009-AJ-6">[5]</a> 129.608° (to Neptune's orbit)</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Natural_satellite" title="Natural satellite">Satellite of</a></th><td class="infobox-data"><a href="/wiki/Neptune" title="Neptune">Neptune</a></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF">Physical characteristics</th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Mean_radius_(astronomy)" title="Mean radius (astronomy)">Mean radius</a></div></th><td class="infobox-data">1,353.4±0.9 km<a href="#cite_note-JPL-SSD-sat_phys-7">[6]</a> (0.2122 <var>R</var>🜨)</td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Spheroid#Surface_area" title="Spheroid">Surface area</a></div></th><td class="infobox-data">23,018,000 km2<a href="#cite_note-nSurfaceArea-8">[b]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Volume" title="Volume">Volume</a></th><td class="infobox-data">10,384,000,000 km3<a href="#cite_note-nVolume-9">[c]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Mass" title="Mass">Mass</a></th><td class="infobox-data">(2.1389±0.0028)×1022 kg (0.00359 Earths)<a href="#cite_note-Jacobson2009-AJ-6">[5]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Mean <a href="/wiki/Density" title="Density">density</a></div></th><td class="infobox-data">2.061 g/cm3<a href="#cite_note-JPL-SSD-sat_phys-7">[6]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Surface_gravity" title="Surface gravity">Surface gravity</a></div></th><td class="infobox-data">0.779 <a href="/wiki/Metre_per_second_squared" title="Metre per second squared">m/s2</a> (0.0794 <a href="/wiki/G-force" title="G-force">g</a>) (0.48 Moons)<a href="#cite_note-nSurfaceGravity-10">[d]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Escape_velocity" title="Escape velocity">Escape velocity</a></div></th><td class="infobox-data">1.455 km/s<a href="#cite_note-nEscapeVelocity-11">[e]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Synodic_rotation_period" class="mw-redirect" title="Synodic rotation period">Synodic rotation period</a></div></th><td class="infobox-data"><a href="/wiki/Synchronous_rotation" class="mw-redirect" title="Synchronous rotation">synchronous</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Sidereal_rotation_period" class="mw-redirect" title="Sidereal rotation period">Sidereal rotation period</a></div></th><td class="infobox-data">5 d, 21 h, 2 min, 53 s<a href="#cite_note-EncycSolSys-Triton-12">[7]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Axial_tilt" title="Axial tilt">Axial tilt</a></div></th><td class="infobox-data">0° (to orbit about Neptune)<a href="#cite_note-AxialTilt-13">[f]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Albedo" title="Albedo">Albedo</a></th><td class="infobox-data">0.76<a href="#cite_note-JPL-SSD-sat_phys-7">[6]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Temperature" title="Temperature">Temperature</a></th><td class="infobox-data">38 K (−235.2 °C)<a href="#cite_note-EncycSolSys-Triton-12">[7]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Apparent_magnitude" title="Apparent magnitude">Apparent magnitude</a></div></th><td class="infobox-data">13.47<a href="#cite_note-magnitude-14">[8]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;"><a href="/wiki/Absolute_magnitude#Solar_System_bodies_(H)" title="Absolute magnitude">Absolute magnitude (H)</a></div></th><td class="infobox-data">−1.2<a href="#cite_note-Fischer2006-15">[9]</a></td></tr><tr><th colspan="2" class="infobox-header" style="background-color:#E0CCFF">Atmosphere</th></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><div style="display: inline-block; line-height: 1.2em; padding: .1em 0;">Surface <a href="/wiki/Atmospheric_pressure" title="Atmospheric pressure">pressure</a></div></th><td class="infobox-data">1.4 Pa (1.38×10−5 atm) (1989)<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> 1.9 Pa (1.88×10−5 atm) (1997)<a href="#cite_note-Elliot2000-16">[10]</a> 1.454 Pa (1.43×10−5 atm) (2022)<a href="#cite_note-Sicardy2024-17">[11]</a></td></tr><tr><th scope="row" class="infobox-label" style="max-width:11em;"><a href="/wiki/Atmospheric_chemistry#Atmospheric_composition" title="Atmospheric chemistry">Composition by volume</a></th><td class="infobox-data"><a href="/wiki/Nitrogen" title="Nitrogen">nitrogen</a>; <a href="/wiki/Methane" title="Methane">methane</a> and <a href="/wiki/Carbon_monoxide" title="Carbon monoxide">carbon monoxide</a> traces<a href="#cite_note-Lellouch2010-18">[12]</a></td></tr></tbody></table> At 2,710 kilometers (1,680 mi)<a href="#cite_note-JPL-SSD-sat_phys-7">[6]</a> in diameter, Triton is the <a href="/wiki/List_of_natural_satellites#List" title="List of natural satellites">seventh-largest moon</a> in the Solar System, the second-largest planetary moon in relation to its primary (after Earth's <a href="/wiki/Moon" title="Moon">Moon</a>), and larger than all of the known <a href="/wiki/Dwarf_planet" title="Dwarf planet">dwarf planets</a>. The mean <a href="/wiki/Density" title="Density">density</a> is 2.061 g/cm3,<a href="#cite_note-JPL-SSD-sat_phys-7">[6]</a> reflecting a composition of approximately 30–45% <a href="/wiki/Ice" title="Ice">water ice</a> by <a href="/wiki/Mass" title="Mass">mass</a>,<a href="#cite_note-EncycSolSys-Triton-12">[7]</a>: 866 with the rest being mostly rock and metal. Triton is differentiated, with a <a href="/wiki/Crust_(geology)" title="Crust (geology)">crust</a> of primarily ice atop a probable <a href="/wiki/Planetary_oceanography" title="Planetary oceanography">subsurface ocean</a> of liquid water and a solid rocky-metallic <a href="/wiki/Planetary_core" title="Planetary core">core</a> at its center. Although Triton's orbit is nearly circular with a very low <a href="/wiki/Orbital_eccentricity" title="Orbital eccentricity">orbital eccentricity</a> of 0.000016,<a href="#cite_note-neptuniansatfact-2">[2]</a> Triton's interior may still experience <a href="/wiki/Tidal_heating" title="Tidal heating">tidal heating</a> through obliquity tides. Triton is one of the most geologically active worlds in the Solar System, with an estimated average surface age of less than 100 million years old. Its surface is covered by <a href="/wiki/Solid_nitrogen" title="Solid nitrogen">frozen nitrogen</a> and is geologically young, with very few <a href="/wiki/Impact_crater" title="Impact crater">impact craters</a>. Young, intricate <a href="/wiki/Cryovolcanic" class="mw-redirect" title="Cryovolcanic">cryovolcanic</a> and <a href="/wiki/Tectonic" class="mw-redirect" title="Tectonic">tectonic</a> terrains suggest a complex geological history. The atmosphere of Triton is composed primarily of nitrogen, with minor components of <a href="/wiki/Methane" title="Methane">methane</a> and <a href="/wiki/Carbon_monoxide" title="Carbon monoxide">carbon monoxide</a>. Triton's atmosphere is relatively thin and strongly variable, with its atmospheric surface pressure varying by up to a factor of three within the past 30 years. Triton's atmosphere supports clouds of nitrogen ice crystals and a layer of organic atmospheric <a href="/wiki/Haze" title="Haze">haze</a>. Triton was the first <a href="/wiki/Neptunian_moon" class="mw-redirect" title="Neptunian moon">Neptunian moon</a> to be discovered, on October 10, 1846, by English astronomer <a href="/wiki/William_Lassell" title="William Lassell">William Lassell</a>. The 1989 <a href="/wiki/Flyby_(spaceflight)" title="Flyby (spaceflight)">flyby</a> of Triton by the <a href="/wiki/Voyager_2" title="Voyager 2">Voyager 2</a> <a href="/wiki/Spacecraft" title="Spacecraft">spacecraft</a> remains the only up-close visit to the moon as of 2024. As the <a href="/wiki/Space_probe" class="mw-redirect" title="Space probe">probe</a> was only able to study about 40% of the moon's surface, multiple concept missions have been developed to revisit Triton. These include a <a href="/wiki/Discovery_program" class="mw-redirect" title="Discovery program">Discovery</a>-class <a href="/wiki/Trident_(spacecraft)" title="Trident (spacecraft)">Trident</a> and <a href="/wiki/New_Frontiers_program" title="New Frontiers program">New Frontiers</a>-class Triton Ocean Worlds Surveyor and Nautilus.<a href="#cite_note-21">[15]</a><a href="#cite_note-Jason_Dekarske_2023-22">[16]</a> <div id="toc" class="toc" role="navigation" aria-labelledby="mw-toc-heading"><input type="checkbox" role="button" id="toctogglecheckbox" class="toctogglecheckbox" style="display:none"><div class="toctitle" lang="en" dir="ltr"><h2 id="mw-toc-heading">Contents</h2><label class="toctogglelabel" for="toctogglecheckbox"></label></div> <ul> <li class="toclevel-1 tocsection-1"><a href="#Discovery_and_naming">1 Discovery and naming</a></li> <li class="toclevel-1 tocsection-2"><a href="#Orbit_and_rotation">2 Orbit and rotation</a></li> <li class="toclevel-1 tocsection-3"><a href="#Capture">3 Capture</a></li> <li class="toclevel-1 tocsection-4"><a href="#Physical_characteristics">4 Physical characteristics</a></li> <li class="toclevel-1 tocsection-5"><a href="#Atmosphere">5 Atmosphere</a></li> <li class="toclevel-1 tocsection-6"><a href="#Surface_features">6 Surface features</a> <ul> <li class="toclevel-2 tocsection-7"><a href="#Cryovolcanism">6.1 Cryovolcanism</a></li> <li class="toclevel-2 tocsection-8"><a href="#Plumes">6.2 Plumes</a></li> <li class="toclevel-2 tocsection-9"><a href="#Polar_cap,_plains_and_ridges">6.3 Polar cap, plains and ridges</a></li> <li class="toclevel-2 tocsection-10"><a href="#Cantaloupe_terrain">6.4 Cantaloupe terrain</a></li> <li class="toclevel-2 tocsection-11"><a href="#Impact_craters">6.5 Impact craters</a></li> </ul> </li> <li class="toclevel-1 tocsection-12"><a href="#Observation_and_exploration">7 Observation and exploration</a></li> <li class="toclevel-1 tocsection-13"><a href="#Maps">8 Maps</a></li> <li class="toclevel-1 tocsection-14"><a href="#See_also">9 See also</a></li> <li class="toclevel-1 tocsection-15"><a href="#Notes">10 Notes</a></li> <li class="toclevel-1 tocsection-16"><a href="#References">11 References</a></li> <li class="toclevel-1 tocsection-17"><a href="#External_links">12 External links</a></li> </ul> </div> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(1)"><h2 id="Discovery_and_naming">Discovery and naming</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=1" title="Edit section: Discovery and naming" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-1 collapsible-block" id="mf-section-1"> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:William_Lassell.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/William_Lassell.jpg/170px-William_Lassell.jpg" decoding="async" width="170" height="256" class="mw-file-element" data-file-width="355" data-file-height="535"></noscript><span class="lazy-image-placeholder" style="width: 170px;height: 256px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/William_Lassell.jpg/170px-William_Lassell.jpg" data-width="170" data-height="256" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/William_Lassell.jpg/255px-William_Lassell.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/William_Lassell.jpg/340px-William_Lassell.jpg 2x" data-class="mw-file-element"> </a><figcaption>William Lassell, the discoverer of Triton</figcaption></figure> Triton was discovered by British astronomer <a href="/wiki/William_Lassell" title="William Lassell">William Lassell</a> on October 10, 1846,<a href="#cite_note-LassellDiscovery-23">[17]</a> just 17 days after the <a href="/wiki/Discovery_of_Neptune" title="Discovery of Neptune">discovery of Neptune</a>. When <a href="/wiki/John_Herschel" title="John Herschel">John Herschel</a> received news of Neptune's discovery, he wrote to Lassell suggesting he search for possible moons. Lassell discovered Triton eight days later.<a href="#cite_note-LassellDiscovery-23">[17]</a><a href="#cite_note-Lassell_refs-24">[18]</a> Lassell also claimed for a period<a href="#cite_note-26">[g]</a> to have discovered rings.<a href="#cite_note-Smithetal1984-25">[19]</a> Although Neptune was later confirmed to <a href="/wiki/Rings_of_Neptune" title="Rings of Neptune">have rings</a>, they are so faint and dark that it is not plausible he saw them. A brewer by trade, Lassell spotted Triton with his self-built 61 cm (24 in) <a href="/wiki/Aperture" title="Aperture">aperture</a> metal mirror reflecting <a href="/wiki/Telescope" title="Telescope">telescope</a> (also known as the "two-foot" reflector).<a href="#cite_note-:0-27">[20]</a> This telescope was donated to the <a href="/wiki/Royal_Observatory,_Greenwich" title="Royal Observatory, Greenwich">Royal Observatory, Greenwich</a> in the 1880s, but was eventually dismantled.<a href="#cite_note-:0-27">[20]</a> Triton is named after the Greek sea god <a href="/wiki/Triton_(mythology)" title="Triton (mythology)">Triton</a> (Τρίτων), the son of <a href="/wiki/Poseidon" title="Poseidon">Poseidon</a> (the Greek god corresponding to the Roman <a href="/wiki/Neptune_(mythology)" title="Neptune (mythology)">Neptune</a>). The name was first proposed by <a href="/wiki/Camille_Flammarion" title="Camille Flammarion">Camille Flammarion</a> in his 1880 book Astronomie Populaire,<a href="#cite_note-Flammarion1880-28">[21]</a> and was officially adopted many decades later.<a href="#cite_note-PMoore-29">[22]</a> Until the discovery of the second moon <a href="/wiki/Nereid_(moon)" title="Nereid (moon)">Nereid</a> in 1949, Triton was commonly referred to as "the satellite of Neptune". Lassell did not name his discovery; he later successfully suggested the name <a href="/wiki/Hyperion_(moon)" title="Hyperion (moon)">Hyperion</a> for the eighth moon of <a href="/wiki/Saturn" title="Saturn">Saturn</a> when he discovered it.<a href="#cite_note-IAU-solarsysNames-30">[23]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(2)"><h2 id="Orbit_and_rotation">Orbit and rotation</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=2" title="Edit section: Orbit and rotation" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-2 collapsible-block" id="mf-section-2"> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Triton_orbit_%26_Neptune.png" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Triton_orbit_%26_Neptune.png/220px-Triton_orbit_%26_Neptune.png" decoding="async" width="220" height="105" class="mw-file-element" data-file-width="1600" data-file-height="765"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 105px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Triton_orbit_%26_Neptune.png/220px-Triton_orbit_%26_Neptune.png" data-width="220" data-height="105" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/66/Triton_orbit_%26_Neptune.png/330px-Triton_orbit_%26_Neptune.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/66/Triton_orbit_%26_Neptune.png/440px-Triton_orbit_%26_Neptune.png 2x" data-class="mw-file-element"> </a><figcaption>The orbit of Triton (red) is <a href="/wiki/Retrograde_and_direct_motion" class="mw-redirect" title="Retrograde and direct motion">opposite in direction</a> and <a href="/wiki/Orbital_inclination" title="Orbital inclination">tilted −23°</a> compared to a typical <a href="/wiki/Moons_of_Neptune" title="Moons of Neptune">moon</a>'s orbit (green) in the plane of Neptune's equator.</figcaption></figure> Triton is unique among all large moons in the Solar System for its <a href="/wiki/Retrograde_orbit" class="mw-redirect" title="Retrograde orbit">retrograde orbit</a> around its planet (i.e. it orbits in a direction opposite to the planet's rotation). Most of the outer <a href="/wiki/Irregular_moon" title="Irregular moon">irregular moons</a> of <a href="/wiki/Jupiter" title="Jupiter">Jupiter</a> and <a href="/wiki/Saturn" title="Saturn">Saturn</a> also have retrograde orbits, as do some of the irregular moons of <a href="/wiki/Uranus" title="Uranus">Uranus</a> and Neptune. However, these moons are all much more distant from their primaries and are small in comparison with the largest of them (<a href="/wiki/Phoebe_(moon)" title="Phoebe (moon)">Phoebe</a>)<a href="#cite_note-nLargest-31">[h]</a> having only 8% of the diameter (and 0.03% of the mass) of Triton. Triton's orbit is associated with two tilts, the <a href="/wiki/Obliquity" class="mw-redirect" title="Obliquity">obliquity</a> of Neptune's rotation to Neptune's orbit, 30°, and the inclination of Triton's orbit to Neptune's rotation, 157° (an inclination over 90° indicates retrograde motion). Triton's orbit precesses forward relative to Neptune's rotation with a period of about 678 Earth years (4.1 Neptunian years),<a href="#cite_note-JPL-SSD-Neptune-5">[4]</a><a href="#cite_note-Jacobson2009-AJ-6">[5]</a> making its Neptune-orbit-relative inclination vary between 127° and 173°. That inclination is currently 130°; Triton's orbit is now near its maximum departure from coplanarity with Neptune's. Triton's rotation is <a href="/wiki/Tidally_locked" class="mw-redirect" title="Tidally locked">tidally locked</a> to be synchronous with its orbit around Neptune: it keeps one face oriented toward the planet at all times. Its equator is almost exactly aligned with its orbital plane.<a href="#cite_note-Davies1991-ControlNetwork-32">[24]</a> At present, Triton's rotational axis is about 40° from Neptune's <a href="/wiki/Orbital_plane" title="Orbital plane">orbital plane</a>, hence as Neptune orbits the Sun, Triton's polar regions take turns facing the Sun, resulting in seasonal changes as one pole, then the other moves into the sunlight. Such changes were observed in 2010.<a href="#cite_note-SpaceCom-TritonSeasons-33">[25]</a> Triton's revolution around Neptune has become a nearly perfect circle with an <a href="/wiki/Orbital_eccentricity" title="Orbital eccentricity">eccentricity</a> of almost zero. <a href="/wiki/Viscoelastic" class="mw-redirect" title="Viscoelastic">Viscoelastic</a> damping from tides alone is not thought to be capable of <a href="/wiki/Tidal_circularization" title="Tidal circularization">circularizing</a> Triton's orbit in the time since the origin of the system, and <a href="/wiki/Drag_(physics)" title="Drag (physics)">gas drag</a> from a <a href="/wiki/Retrograde_and_prograde_motion" title="Retrograde and prograde motion">prograde</a> debris disc is likely to have played a substantial role.<a href="#cite_note-JPL-SSD-Neptune-5">[4]</a><a href="#cite_note-Jacobson2009-AJ-6">[5]</a> <a href="/wiki/Tidal_deceleration" class="mw-redirect" title="Tidal deceleration">Tidal interactions</a> also cause Triton's orbit, which is already closer to Neptune than the <a href="/wiki/Moon" title="Moon">Moon</a> is to Earth, to gradually decay further; predictions are that 3.6 billion years from now, Triton will pass within Neptune's <a href="/wiki/Roche_limit" title="Roche limit">Roche limit</a>.<a href="#cite_note-Chyba-34">[26]</a> This will result in either a collision with Neptune's atmosphere or the breakup of Triton, forming a new <a href="/wiki/Planetary_ring" class="mw-redirect" title="Planetary ring">ring</a> system similar to that found around <a href="/wiki/Saturn" title="Saturn">Saturn</a>.<a href="#cite_note-Chyba-34">[26]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(3)"><h2 id="Capture">Capture</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=3" title="Edit section: Capture" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-3 collapsible-block" id="mf-section-3"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Capture_of_Triton" title="Capture of Triton">Capture of Triton</a></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:Outersolarsystem_objectpositions_labels_comp.png" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Outersolarsystem_objectpositions_labels_comp.png/220px-Outersolarsystem_objectpositions_labels_comp.png" decoding="async" width="220" height="216" class="mw-file-element" data-file-width="2708" data-file-height="2656"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 216px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Outersolarsystem_objectpositions_labels_comp.png/220px-Outersolarsystem_objectpositions_labels_comp.png" data-width="220" data-height="216" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/81/Outersolarsystem_objectpositions_labels_comp.png/330px-Outersolarsystem_objectpositions_labels_comp.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/81/Outersolarsystem_objectpositions_labels_comp.png/440px-Outersolarsystem_objectpositions_labels_comp.png 2x" data-class="mw-file-element"> </a><figcaption>The <a href="/wiki/Kuiper_belt" title="Kuiper belt">Kuiper belt</a> (green), in the Solar System's outskirts, is where Triton is thought to have originated.</figcaption></figure> The current understanding of moons in retrograde orbits means they cannot form in the same region of the <a href="/wiki/Solar_nebula" class="mw-redirect" title="Solar nebula">solar nebula</a> as the planets they orbit. Therefore Triton must have been captured from elsewhere in the Solar System. Astrophysicists believe it might have originated in the <a href="/wiki/Kuiper_belt" title="Kuiper belt">Kuiper belt</a>,<a href="#cite_note-Agnor06-20">[14]</a> a ring of small icy objects extending from just inside the orbit of Neptune to about 50 <a href="/wiki/Astronomical_unit" title="Astronomical unit">AU</a> from the Sun. Thought to be the point of origin for the majority of short-period <a href="/wiki/Comet" title="Comet">comets</a> observed from Earth, the belt is also home to several large, planet-like bodies including <a href="/wiki/Pluto" title="Pluto">Pluto</a>, which is now recognized as the largest in a population of Kuiper belt objects (the <a href="/wiki/Plutino" title="Plutino">plutinos</a>) <a href="/wiki/Orbital_resonance#Pluto_resonances" title="Orbital resonance">locked in resonant orbits</a> with Neptune. Triton is only slightly larger than Pluto and is nearly identical in composition, which has led to the hypothesis that the two share a common origin.<a href="#cite_note-Cruikshank2004-35">[27]</a> This has been further supported in a 2024 study of the chemical composition of Pluto and Triton which suggests they originated in the same region of the outer Solar System before the latter was pulled into Neptune’s orbit. Kathleen Mandt at NASA's Goddard Space Flight Center in Maryland and her colleagues hypothesize that Triton and Pluto formed close to each other before the Solar System settled down. "They probably formed in the same region, which wouldn't be where the Kuiper belt is now—it would have been either closer or further away," says Mandt.<a href="#cite_note-:2-36">[28]</a> Studying prior data on the two bodies, the team found that both have a large amount of nitrogen and trace amounts of methane and carbon monoxide, which could have accumulated in the outer regions of the young nebula "For some reason, Triton was then ejected from this region and ensnared by Neptune". "They had to have formed beyond the water-ice line," says Mandt, referring to the distance from the sun where water would freeze into ice or snow, which is why Triton and Pluto have similar amounts of certain key elements. "One possibility is that the giant planets moved closer to the sun early in the first 100 million years or so of the Solar System, which may have disrupted the orbits of some bodies like Triton.", says Mandt.<a href="#cite_note-:2-36">[28]</a> The proposed capture of Triton may explain several features of the Neptunian system, including the extremely <a href="/wiki/Eccentric_orbit" class="mw-redirect" title="Eccentric orbit">eccentric orbit</a> of Neptune's moon <a href="/wiki/Nereid_(moon)" title="Nereid (moon)">Nereid</a> and the scarcity of moons as compared to the other <a href="/wiki/Giant_planet" title="Giant planet">giant planets</a>. Triton's initially eccentric orbit would have intersected the orbits of irregular moons and <a href="/wiki/Perturbation_(astronomy)" title="Perturbation (astronomy)">disrupted</a> those of smaller regular moons, dispersing them through <a href="/wiki/Gravitation" class="mw-redirect" title="Gravitation">gravitational</a> interactions.<a href="#cite_note-JPL-SSD-Neptune-5">[4]</a><a href="#cite_note-Jacobson2009-AJ-6">[5]</a> Triton's eccentric post-capture orbit would have also resulted in <a href="/wiki/Tidal_heating" title="Tidal heating">tidal heating</a> of its interior, which could have kept Triton fluid for a billion years; this inference is supported by evidence of differentiation in Triton's interior. This source of internal heat disappeared following tidal locking and circularization of the orbit.<a href="#cite_note-Ross1990-37">[29]</a> Two types of mechanisms have been proposed for Triton's capture. To be gravitationally captured by a planet, a passing body must lose sufficient energy to be slowed down to a speed less than that required to escape.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> An early model of how Triton may have been slowed was by collision with another object, either one that happened to be passing by Neptune (which is unlikely), or a moon or proto-moon in orbit around Neptune (which is more likely).<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> A more recent hypothesis suggests that, before its capture, Triton was part of a binary system. When this binary encountered Neptune, it interacted in such a way that the binary dissociated, with one portion of the binary expelled, and the other, Triton, becoming bound to Neptune. This event is more likely for more massive companions.<a href="#cite_note-Agnor06-20">[14]</a> This hypothesis is supported by several lines of evidence, including binaries being very common among the large Kuiper belt objects.<a href="#cite_note-IOPorg-KuiperObjectBinaries-38">[30]</a><a href="#cite_note-Jewitt2005-39">[31]</a> The event was brief but gentle, saving Triton from collisional disruption. Events like this may have been common during the formation of Neptune, or later when it <a href="/wiki/Planetary_migration" title="Planetary migration">migrated outward</a>.<a href="#cite_note-Agnor06-20">[14]</a> However, simulations in 2017 showed that after Triton's capture, and before its orbital eccentricity decreased, it probably did collide with at least one other moon, and caused collisions between other moons.<a href="#cite_note-40">[32]</a><a href="#cite_note-41">[33]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(4)"><h2 id="Physical_characteristics">Physical characteristics</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=4" title="Edit section: Physical characteristics" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-4 collapsible-block" id="mf-section-4"> <style data-mw-deduplicate="TemplateStyles:r1237032888/mw-parser-output/.tmulti">.mw-parser-output .tmulti .multiimageinner{display:flex;flex-direction:column}.mw-parser-output .tmulti .trow{display:flex;flex-direction:row;clear:left;flex-wrap:wrap;width:100%;box-sizing:border-box}.mw-parser-output .tmulti .tsingle{margin:1px;float:left}.mw-parser-output .tmulti .theader{clear:both;font-weight:bold;text-align:center;align-self:center;background-color:transparent;width:100%}.mw-parser-output .tmulti .thumbcaption{background-color:transparent}.mw-parser-output .tmulti .text-align-left{text-align:left}.mw-parser-output .tmulti .text-align-right{text-align:right}.mw-parser-output .tmulti .text-align-center{text-align:center}@media all and (max-width:720px){.mw-parser-output .tmulti .thumbinner{width:100%!important;box-sizing:border-box;max-width:none!important;align-items:center}.mw-parser-output .tmulti .trow{justify-content:center}.mw-parser-output .tmulti .tsingle{float:none!important;max-width:100%!important;box-sizing:border-box;text-align:center}.mw-parser-output .tmulti .tsingle .thumbcaption{text-align:left}.mw-parser-output .tmulti .trow>.thumbcaption{text-align:center}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .tmulti .multiimageinner img{background-color:white}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .tmulti .multiimageinner img{background-color:white}}</style><div class="thumb tmulti tright"><div class="thumbinner multiimageinner" style="width:242px;max-width:242px"><div class="trow"><div class="tsingle" style="width:240px;max-width:240px"><div class="thumbimage"><a href="/wiki/File:Masa_de_triton.svg" class="mw-file-description"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/85/Masa_de_triton.svg/238px-Masa_de_triton.svg.png" decoding="async" width="238" height="168" class="mw-file-element" data-file-width="898" data-file-height="635"></noscript><span class="lazy-image-placeholder" style="width: 238px;height: 168px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/8/85/Masa_de_triton.svg/238px-Masa_de_triton.svg.png" data-alt="" data-width="238" data-height="168" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/85/Masa_de_triton.svg/357px-Masa_de_triton.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/85/Masa_de_triton.svg/476px-Masa_de_triton.svg.png 2x" data-class="mw-file-element"> </a></div><div class="thumbcaption">Triton dominates the Neptunian moon system, with over 99.5% of its total mass. This imbalance may reflect the elimination of many of Neptune's original satellites following Triton's capture.<a href="#cite_note-JPL-SSD-Neptune-5">[4]</a><a href="#cite_note-Jacobson2009-AJ-6">[5]</a></div></div></div><div class="trow"><div class="tsingle" style="width:240px;max-width:240px"><div class="thumbimage"><a href="/wiki/File:Triton,_Earth_%26_Moon_size_comparison.jpg" class="mw-file-description"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Triton%2C_Earth_%26_Moon_size_comparison.jpg/238px-Triton%2C_Earth_%26_Moon_size_comparison.jpg" decoding="async" width="238" height="161" class="mw-file-element" data-file-width="3000" data-file-height="2026"></noscript><span class="lazy-image-placeholder" style="width: 238px;height: 161px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Triton%2C_Earth_%26_Moon_size_comparison.jpg/238px-Triton%2C_Earth_%26_Moon_size_comparison.jpg" data-alt="" data-width="238" data-height="161" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Triton%2C_Earth_%26_Moon_size_comparison.jpg/357px-Triton%2C_Earth_%26_Moon_size_comparison.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2b/Triton%2C_Earth_%26_Moon_size_comparison.jpg/476px-Triton%2C_Earth_%26_Moon_size_comparison.jpg 2x" data-class="mw-file-element"> </a></div><div class="thumbcaption">Triton (lower left) compared to the Moon (upper left) and Earth (right), to scale</div></div></div></div></div> Triton is the seventh-largest moon and <a href="/wiki/List_of_Solar_System_objects_by_size" title="List of Solar System objects by size">sixteenth-largest object</a> in the Solar System and is modestly larger than the <a href="/wiki/Dwarf_planet" title="Dwarf planet">dwarf planets</a> <a href="/wiki/Pluto" title="Pluto">Pluto</a> and <a href="/wiki/Eris_(dwarf_planet)" title="Eris (dwarf planet)">Eris</a>. It is also the largest retrograde moon in the Solar System. It accounts for more than 99.5% of all the mass known to orbit Neptune, including the planet's rings and fifteen other known moons,<a href="#cite_note-nMassTriton-42">[i]</a> and is also more massive than all known moons in the Solar System smaller than itself combined.<a href="#cite_note-nMassOthers-43">[j]</a> Also, with a diameter 5.5% that of Neptune, it is the largest moon of a gas giant relative to its planet in terms of diameter, although Titan is bigger relative to Saturn in terms of mass (the ratio of Triton's mass to that of Neptune is approximately 1:4788). It has a radius, density (2.061 g/cm3), temperature and chemical composition similar to that of <a href="/wiki/Pluto" title="Pluto">Pluto</a>.<a href="#cite_note-voyager-44">[34]</a> Triton's surface is covered with a transparent layer of <a href="/wiki/Annealing_(metallurgy)" class="mw-redirect" title="Annealing (metallurgy)">annealed</a> <a href="/wiki/Solid_nitrogen" title="Solid nitrogen">frozen nitrogen</a>. Only 40% of Triton's surface has been observed and studied, but it may be entirely covered in such a thin sheet of nitrogen ice. Triton's surface consists of 55% nitrogen ice with other ices mixed in. <a href="/wiki/Water" title="Water">Water</a> ice comprises 15–35% and frozen <a href="/wiki/Carbon_dioxide" title="Carbon dioxide">carbon dioxide</a> (<a href="/wiki/Dry_ice" title="Dry ice">dry ice</a>) the remaining 10–20%. Trace ices include 0.1% <a href="/wiki/Methane" title="Methane">methane</a> and 0.05% <a href="/wiki/Carbon_monoxide" title="Carbon monoxide">carbon monoxide</a>.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a>: 868 There could also be <a href="/wiki/Ammonia" title="Ammonia">ammonia</a> ice on the surface, as there are indications of ammonia <a href="/wiki/Dihydrate" class="mw-redirect" title="Dihydrate">dihydrate</a> in the <a href="/wiki/Lithosphere" title="Lithosphere">lithosphere</a>.<a href="#cite_note-ammonia-45">[35]</a> Triton's mean density implies that it probably consists of about 30–45% <a href="/wiki/Ice" title="Ice">water ice</a> (including relatively small amounts of volatile ices), with the remainder being rocky material.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> Triton's surface area is 23 million km2, which is 4.5% of <a href="/wiki/Earth" title="Earth">Earth</a>, or 15.5% of Earth's land area. Triton has an unusually high <a href="/wiki/Albedo" title="Albedo">albedo</a>, reflecting 60–95% of the sunlight that reaches it, and it has changed only slightly since the first observations. By comparison, the Moon reflects only 11%.<a href="#cite_note-Medkeff2002-LunarAlbedo-46">[36]</a> This high albedo causes Triton to reflect a lot of whatever little sunlight there is instead of absorbing it,<a href="#cite_note-47">[37]</a><a href="#cite_note-48">[38]</a> causing it to have the coldest recorded temperature in the Solar System at 38 K (−235 °C).<a href="#cite_note-49">[39]</a><a href="#cite_note-50">[40]</a> Triton's reddish color is thought to be the result of methane ice, which is converted to <a href="/wiki/Tholin" title="Tholin">tholins</a> under exposure to <a href="/wiki/Ultraviolet" title="Ultraviolet">ultraviolet</a> radiation.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a><a href="#cite_note-Grundy-51">[41]</a> Because Triton's surface indicates a long history of melting, models of its interior posit that Triton is differentiated, like <a href="/wiki/Earth" title="Earth">Earth</a>, into a solid <a href="/wiki/Core_(geology)" class="mw-redirect" title="Core (geology)">core</a>, a <a href="/wiki/Mantle_(geology)" title="Mantle (geology)">mantle</a> and a <a href="/wiki/Crust_(geology)" title="Crust (geology)">crust</a>. <a href="/wiki/Water" title="Water">Water</a>, the most abundant <a href="/wiki/Volatile_(astrogeology)" title="Volatile (astrogeology)">volatile</a> in the Solar System, comprises Triton's mantle, enveloping a core of rock and metal. There is enough rock in Triton's interior for <a href="/wiki/Radioactive_decay" title="Radioactive decay">radioactive decay</a> to maintain a liquid <a href="/wiki/Subsurface_ocean" class="mw-redirect" title="Subsurface ocean">subsurface ocean</a> to this day, similar to what is thought to exist beneath the surface of <a href="/wiki/Europa_(moon)" title="Europa (moon)">Europa</a> and several other icy outer Solar System worlds.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a><a href="#cite_note-Hussman2006-52">[42]</a><a href="#cite_note-Sci_Am_2017-53">[43]</a><a href="#cite_note-Nimmo2015-54">[44]</a> This is not thought to be adequate to power convection in Triton's icy crust. However, the strong <a href="/wiki/Obliquity" class="mw-redirect" title="Obliquity">obliquity</a> <a href="/wiki/Tidal_Heating" class="mw-redirect" title="Tidal Heating">tides</a> are believed to generate enough additional heat to accomplish this and produce the observed signs of recent surface geological activity.<a href="#cite_note-Nimmo2015-54">[44]</a> The black material ejected is suspected to contain <a href="/wiki/Organic_compound" title="Organic compound">organic compounds</a>,<a href="#cite_note-Sci_Am_2017-53">[43]</a> and if liquid water is present on Triton, it has been speculated that this could make it <a href="/wiki/Planetary_habitability" title="Planetary habitability">habitable</a> for some form of life.<a href="#cite_note-Sci_Am_2017-53">[43]</a><a href="#cite_note-Irwin2001-Plausibility-55">[45]</a><a href="#cite_note-space.com-56">[46]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(5)"><h2 id="Atmosphere">Atmosphere</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=5" title="Edit section: Atmosphere" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-5 collapsible-block" id="mf-section-5"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main articles: <a href="/wiki/Atmosphere_of_Triton" title="Atmosphere of Triton">Atmosphere of Triton</a> and <a href="/wiki/Climate_of_Triton" title="Climate of Triton">Climate of Triton</a></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:The_Horns_of_Triton_-_Voyager_2_(43407605905).png" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/74/The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png/220px-The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png" decoding="async" width="220" height="220" class="mw-file-element" data-file-width="1000" data-file-height="1000"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 220px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/7/74/The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png/220px-The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png" data-width="220" data-height="220" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/74/The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png/330px-The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/74/The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png/440px-The_Horns_of_Triton_-_Voyager_2_%2843407605905%29.png 2x" data-class="mw-file-element"> </a><figcaption>Departing image of Triton, showing its hazy atmosphere illuminated by sunlight and "extending" its crescent</figcaption></figure> Triton has a tenuous but well-structured and global <a href="/wiki/Nitrogen" title="Nitrogen">nitrogen</a> atmosphere,<a href="#cite_note-Wind_direction-57">[47]</a> with trace amounts of carbon monoxide and small amounts of methane near its surface.<a href="#cite_note-nature2-58">[48]</a><a href="#cite_note-grand-59">[49]</a><a href="#cite_note-Lellouch2010-18">[12]</a> Like <a href="/wiki/Pluto" title="Pluto">Pluto</a>'s atmosphere, the atmosphere of Triton is thought to result from the evaporation of nitrogen from its surface.<a href="#cite_note-Cruikshank2004-35">[27]</a> Its surface temperature is at least 35.6 K (−237.6 °C) because Triton's nitrogen ice is in the warmer, hexagonal crystalline state, and the phase transition between hexagonal and cubic nitrogen ice occurs at that temperature.<a href="#cite_note-Duxburyetal1993-60">[50]</a> An upper limit in the low 40s (K) can be set from vapor pressure equilibrium with nitrogen gas in Triton's atmosphere.<a href="#cite_note-Tryka1993-Determination-61">[51]</a> This is colder than Pluto's average equilibrium temperature of 44 K (−229.2 °C). Triton's surface atmospheric pressure is only about 1.4–1.9 <a href="/wiki/Pascal_(unit)" title="Pascal (unit)">Pa</a> (0.014–0.019 <a href="/wiki/Bar_(unit)" title="Bar (unit)">mbar</a>).<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Tritoncloud.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Tritoncloud.jpg/220px-Tritoncloud.jpg" decoding="async" width="220" height="220" class="mw-file-element" data-file-width="448" data-file-height="448"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 220px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Tritoncloud.jpg/220px-Tritoncloud.jpg" data-width="220" data-height="220" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Tritoncloud.jpg/330px-Tritoncloud.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/a/a0/Tritoncloud.jpg/440px-Tritoncloud.jpg 2x" data-class="mw-file-element"> </a><figcaption>Clouds observed above Triton's limb by Voyager 2.</figcaption></figure> Turbulence at Triton's surface creates a <a href="/wiki/Troposphere" title="Troposphere">troposphere</a> (a "weather region") rising to an altitude of 8 km. Streaks on Triton's surface left by geyser plumes suggest that the troposphere is driven by seasonal winds capable of moving material over a micrometer in size.<a href="#cite_note-SmithSoderblom1989-62">[52]</a> Unlike other atmospheres, Triton's lacks a <a href="/wiki/Stratosphere" title="Stratosphere">stratosphere</a> and instead has a <a href="/wiki/Thermosphere" title="Thermosphere">thermosphere</a> from altitudes of 8 to 950 km and an exosphere above that.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> The temperature of Triton's upper atmosphere, at 95±5 K, is higher than that at its surface, due to heat absorbed from solar radiation and Neptune's <a href="/wiki/Magnetosphere" title="Magnetosphere">magnetosphere</a>.<a href="#cite_note-nature2-58">[48]</a><a href="#cite_note-Stevens1992-thermosphere-63">[53]</a> A haze permeates most of Triton's troposphere, thought to be composed largely of <a href="/wiki/Hydrocarbon" title="Hydrocarbon">hydrocarbons</a> and <a href="/wiki/Nitrile" title="Nitrile">nitriles</a> created by the action of sunlight on methane. Triton's atmosphere also has clouds of condensed nitrogen that lie between 1 and 3 km from its surface.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> In 1997, observations from <a href="/wiki/Earth" title="Earth">Earth</a> were made of Triton's limb as it <a href="/wiki/Occultation" title="Occultation">passed in front of stars</a>. These observations indicated the presence of a denser atmosphere than was deduced from <a href="/wiki/Voyager_2" title="Voyager 2">Voyager 2</a> data.<a href="#cite_note-Hubblesite-64">[54]</a> Other observations have shown an increase in temperature by 5% from 1989 to 1998.<a href="#cite_note-MIT_Triton-65">[55]</a> These observations indicated Triton was approaching an unusually warm southern hemisphere summer season that happens only once every few hundred years. Hypotheses for this warming include a change of frost patterns on Triton's surface and a change in ice <a href="/wiki/Albedo" title="Albedo">albedo</a>, which would allow more heat to be absorbed.<a href="#cite_note-Scienceagogo.com-66">[56]</a> Another hypothesis argues that temperature changes are a result of the deposition of dark, red material from geological processes. Because Triton's <a href="/wiki/Bond_albedo" title="Bond albedo">Bond albedo</a> is among the highest in the <a href="/wiki/Solar_System" title="Solar System">Solar System</a>, it is sensitive to small variations in spectral albedo.<a href="#cite_note-Nature-67">[57]</a> Based on the increase in atmospheric pressure between 1989 and 1997, it is estimated that by 2010 Triton's atmospheric pressure may have increased to as much as 4 Pa.<a href="#cite_note-Lellouch2010-18">[12]</a> By 2017, however, Triton's atmospheric surface pressure had nearly returned to Voyager 2 levels; the cause for the rapid spike in atmospheric pressure between 1989 and 2017 remains unexplained.<a href="#cite_note-Sicardy2024-17">[11]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(6)"><h2 id="Surface_features">Surface features</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=6" title="Edit section: Surface features" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-6 collapsible-block" id="mf-section-6"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Geology_of_Triton" title="Geology of Triton">Geology of Triton</a></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Geology_of_Triton.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Geology_of_Triton.jpg/220px-Geology_of_Triton.jpg" decoding="async" width="220" height="221" class="mw-file-element" data-file-width="7441" data-file-height="7468"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 221px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Geology_of_Triton.jpg/220px-Geology_of_Triton.jpg" data-width="220" data-height="221" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Geology_of_Triton.jpg/330px-Geology_of_Triton.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Geology_of_Triton.jpg/440px-Geology_of_Triton.jpg 2x" data-class="mw-file-element"> </a><figcaption>Interpretative <a href="/wiki/Geomorphology" title="Geomorphology">geomorphological</a> map of Triton</figcaption></figure> All detailed knowledge of the surface of Triton was acquired from a distance of 40,000 km by the Voyager 2 spacecraft during a single encounter in 1989.<a href="#cite_note-Gray1989-68">[58]</a> The 40% of Triton's surface imaged by Voyager 2 revealed blocky outcrops, ridges, troughs, furrows, hollows, plateaus, icy plains and a few craters. Triton is relatively flat; its observed topography never varies beyond a kilometer.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> The <a href="/wiki/Impact_crater" title="Impact crater">impact craters</a> observed are concentrated almost entirely in Triton's <a href="/wiki/Leading_hemisphere" class="mw-redirect" title="Leading hemisphere">leading hemisphere</a>.<a href="#cite_note-Mah2019-69">[59]</a> Analysis of crater density and distribution has suggested that in geological terms, Triton's surface is extremely young, with regions varying from an estimated 50 million years old to just an estimated 6 million years old.<a href="#cite_note-Schenk2007-70">[60]</a> Fifty-five percent of Triton's surface is covered with frozen nitrogen, with water ice comprising 15–35% and <a href="/wiki/Dry_ice" title="Dry ice">frozen CO2</a> forming the remaining 10–20%.<a href="#cite_note-71">[61]</a> The surface also has deposits of <a href="/wiki/Tholin" title="Tholin">tholins</a>, a dark, tarry slurry of various organic chemical compounds.<a href="#cite_note-LPI_Oleson-72">[62]</a> <div class="mw-heading mw-heading3"><h3 id="Cryovolcanism">Cryovolcanism</h3> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=7" title="Edit section: Cryovolcanism" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Further information: <a href="/wiki/Cryovolcano" title="Cryovolcano">Cryovolcano</a></div> One of the largest <a href="/wiki/Cryovolcanic" class="mw-redirect" title="Cryovolcanic">cryovolcanic</a> features found on Triton is <a href="/wiki/Leviathan_Patera" title="Leviathan Patera">Leviathan Patera</a>,<a href="#cite_note-73">[63]</a> a caldera-like feature roughly 100 km in diameter seen near the equator. Surrounding this caldera is a massive cryovolcanic plain, Cipango Planum, which is at least 490,000 km2 in area; assuming Leviathan Patera is the primary vent, Leviathan Patera is one of the largest volcanic or cryovolcanic constructs in the Solar System.<a href="#cite_note-schenk2021-74">[64]</a> This feature is also connected to two enormous cryolava lakes seen northwest of the caldera. Because the cryolava on Triton is believed to be primarily water ice with some ammonia, these lakes would qualify as stable bodies of surface liquid water while they were molten. This is the first place such bodies have been found apart from Earth, and Triton is the only icy body known to feature cryolava lakes,[<a href="/wiki/Wikipedia:Citation_needed" title="Wikipedia:Citation needed">citation needed</a>] although similar cryomagmatic extrusions can be seen on <a href="/wiki/Ariel_(moon)" title="Ariel (moon)">Ariel</a>, <a href="/wiki/Ganymede_(moon)" title="Ganymede (moon)">Ganymede</a>, <a href="/wiki/Charon_(moon)" title="Charon (moon)">Charon</a>, and <a href="/wiki/Titan_(moon)" title="Titan (moon)">Titan</a>.<a href="#cite_note-75">[65]</a> <div class="mw-heading mw-heading3"><h3 id="Plumes">Plumes</h3> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=8" title="Edit section: Plumes" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236090951"><div role="note" class="hatnote navigation-not-searchable">Main article: <a href="/wiki/Geology_of_Triton#South_polar_plumes" title="Geology of Triton">Geology of Triton § South polar plumes</a></div> The <a href="/wiki/Voyager_2" title="Voyager 2">Voyager 2</a> probe in 1989 observed a handful of <a href="/wiki/Geyser" title="Geyser">geyser</a>-like eruptions of nitrogen gas or water and <a href="/wiki/Entrainment_(physical_geography)" title="Entrainment (physical geography)">entrained</a> dust from beneath the surface of Triton in plumes up to 8 km high.<a href="#cite_note-voyager-44">[34]</a><a href="#cite_note-Soderblom2-76">[66]</a> Triton is thus one of the few bodies in the Solar System on which active eruptions of some sort have been observed.<a href="#cite_note-Kargel1994-Cryovolcanism-77">[67]</a> The best-observed examples are the <a href="/wiki/Hili_(plume)" class="mw-redirect" title="Hili (plume)">Hili plume</a> and <a href="/wiki/Mahilani_(plume)" class="mw-redirect" title="Mahilani (plume)">Mahilani plume</a> (named after a <a href="/wiki/Zulu_mythology" class="mw-redirect" title="Zulu mythology">Zulu</a> <a href="/wiki/Tikoloshe" title="Tikoloshe">water sprite</a> and a <a href="/wiki/Tonga" title="Tonga">Tongan</a> sea spirit, respectively).<a href="#cite_note-USGS-planetarynames-Hili-Mahilani-78">[68]</a> The precise mechanism behind Triton's plumes is debated;<a href="#cite_note-:1-79">[69]</a> one hypothesis is that Triton's plumes are driven by solar heating underneath a transparent or <a href="/wiki/Translucent" class="mw-redirect" title="Translucent">translucent</a> layer of nitrogen ice, creating a sort of "solid <a href="/wiki/Greenhouse_effect" title="Greenhouse effect">greenhouse effect</a>". As solar radiation warms the darker material beneath, this causes a rapid increase in pressure as the nitrogen begins to <a href="/wiki/Sublimation_(phase_transition)" title="Sublimation (phase transition)">sublimate</a> until enough pressure accumulates for it to erupt through the translucent layer. This model is largely supported by the observation that Triton was near peak southern summer at the time of Voyager 2's flyby, ensuring its southern polar cap was receiving prolonged sunlight.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a><a href="#cite_note-SmithSoderblom1989-62">[52]</a> If this were the case, <a href="/wiki/Carbon_dioxide" title="Carbon dioxide">CO2</a> <a href="/wiki/Geysers_on_Mars" title="Geysers on Mars">geysers on Mars</a> are thought to erupt from its <a href="/wiki/Climate_of_Mars#Polar_caps" title="Climate of Mars">south polar cap</a> each spring in the same way.<a href="#cite_note-THEMIS-80">[70]</a> However, the significant geological activity on Triton has led to alternative proposals that the plumes may be cryovolcanic in nature, rather than driven by solar radiation. A cryovolcanic origin better explains the estimated output of Triton’s plumes, which possibly exceeds 400 kilograms per second (880 lb/s). This is similar to that which is estimated for Enceladus's cryovolcanic plumes at 200 kg/s (440 lb/s). However, if Triton's plumes are cryovolcanically driven, it remains to be explained why they predominantly appear over its southern polar cap.<a href="#cite_note-:1-79">[69]</a> Triton's high surface heat flux may directly melt or vaporize nitrogen ice at the base of its polar caps, creating 'hot spots' which break through the ice or move to the ice caps' margins, before erupting explosively.<a href="#cite_note-:1-79">[69]</a> Though only observed up close once by the Voyager 2 spacecraft, it is estimated that a plume eruption on Triton may last up to a year. <ul class="gallery mw-gallery-traditional"> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><a href="/wiki/File:Leviathan_Patera_Volcanic_Dome.gif" class="mw-file-description" title="Close up of the volcanic province of Leviathan Patera, the caldera in the center of the image. Kraken Catena and Set Catena extend radially from the caldera to the right and upper-right of the image, while Ruach Planitia is seen to the upper left. Just off-screen to the lower left is a fault zone aligned radially with the caldera, indicating a close connection between the tectonics and volcanology of this geologic unit."><noscript><img alt="Close up of the volcanic province of Leviathan Patera, the caldera in the center of the image. Kraken Catena and Set Catena extend radially from the caldera to the right and upper-right of the image, while Ruach Planitia is seen to the upper left. Just off-screen to the lower left is a fault zone aligned radially with the caldera, indicating a close connection between the tectonics and volcanology of this geologic unit." src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Leviathan_Patera_Volcanic_Dome.gif/200px-Leviathan_Patera_Volcanic_Dome.gif" decoding="async" width="200" height="157" class="mw-file-element" data-file-width="1080" data-file-height="850"></noscript><span class="lazy-image-placeholder" style="width: 200px;height: 157px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Leviathan_Patera_Volcanic_Dome.gif/200px-Leviathan_Patera_Volcanic_Dome.gif" data-alt="Close up of the volcanic province of Leviathan Patera, the caldera in the center of the image. Kraken Catena and Set Catena extend radially from the caldera to the right and upper-right of the image, while Ruach Planitia is seen to the upper left. Just off-screen to the lower left is a fault zone aligned radially with the caldera, indicating a close connection between the tectonics and volcanology of this geologic unit." data-width="200" data-height="157" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Leviathan_Patera_Volcanic_Dome.gif/300px-Leviathan_Patera_Volcanic_Dome.gif 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fc/Leviathan_Patera_Volcanic_Dome.gif/400px-Leviathan_Patera_Volcanic_Dome.gif 2x" data-class="mw-file-element"> </a></div> <div class="gallerytext">Close up of the volcanic province of <a href="/wiki/Leviathan_Patera" title="Leviathan Patera">Leviathan Patera</a>, the caldera in the center of the image. <a href="/wiki/Kraken_Catena" title="Kraken Catena">Kraken Catena</a> and <a href="/wiki/Set_Catena" title="Set Catena">Set Catena</a> extend radially from the caldera to the right and upper-right of the image, while <a href="/wiki/Ruach_Planitia" title="Ruach Planitia">Ruach Planitia</a> is seen to the upper left. Just off-screen to the lower left is a fault zone aligned radially with the caldera, indicating a close connection between the tectonics and volcanology of this geologic unit.</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><a href="/wiki/File:Voyager_2_Triton_14bg_r90ccw_colorized.jpg" class="mw-file-description" title="Dark streaks across Triton's south polar cap surface, thought to be dust deposits left by eruptions of nitrogen geysers."><noscript><img alt="Dark streaks across Triton's south polar cap surface, thought to be dust deposits left by eruptions of nitrogen geysers." src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Voyager_2_Triton_14bg_r90ccw_colorized.jpg/199px-Voyager_2_Triton_14bg_r90ccw_colorized.jpg" decoding="async" width="199" height="200" class="mw-file-element" data-file-width="795" data-file-height="800"></noscript><span class="lazy-image-placeholder" style="width: 199px;height: 200px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Voyager_2_Triton_14bg_r90ccw_colorized.jpg/199px-Voyager_2_Triton_14bg_r90ccw_colorized.jpg" data-alt="Dark streaks across Triton's south polar cap surface, thought to be dust deposits left by eruptions of nitrogen geysers." data-width="199" data-height="200" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/58/Voyager_2_Triton_14bg_r90ccw_colorized.jpg/298px-Voyager_2_Triton_14bg_r90ccw_colorized.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/58/Voyager_2_Triton_14bg_r90ccw_colorized.jpg/397px-Voyager_2_Triton_14bg_r90ccw_colorized.jpg 2x" data-class="mw-file-element"> </a></div> <div class="gallerytext">Dark streaks across Triton's south polar cap surface, thought to be dust deposits left by eruptions of <a href="/wiki/Nitrogen" title="Nitrogen">nitrogen</a> geysers.</div> </li> <li class="gallerybox" style="width: 235px"> <div class="thumb" style="width: 230px; height: 230px;"><a href="/wiki/File:Cryolava-lake-triton.jpg" class="mw-file-description" title="Two large cryolava lakes on Triton, seen west of Leviathan Patera. Combined, they are nearly the size of Kraken Mare on Titan. These features are unusually crater free, indicating they are young and were recently molten."><noscript><img alt="Two large cryolava lakes on Triton, seen west of Leviathan Patera. Combined, they are nearly the size of Kraken Mare on Titan. These features are unusually crater free, indicating they are young and were recently molten." src="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Cryolava-lake-triton.jpg/200px-Cryolava-lake-triton.jpg" decoding="async" width="200" height="200" class="mw-file-element" data-file-width="512" data-file-height="512"></noscript><span class="lazy-image-placeholder" style="width: 200px;height: 200px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Cryolava-lake-triton.jpg/200px-Cryolava-lake-triton.jpg" data-alt="Two large cryolava lakes on Triton, seen west of Leviathan Patera. Combined, they are nearly the size of Kraken Mare on Titan. These features are unusually crater free, indicating they are young and were recently molten." data-width="200" data-height="200" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/89/Cryolava-lake-triton.jpg/300px-Cryolava-lake-triton.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/89/Cryolava-lake-triton.jpg/400px-Cryolava-lake-triton.jpg 2x" data-class="mw-file-element"> </a></div> <div class="gallerytext">Two large <a href="/wiki/Cryolava" class="mw-redirect" title="Cryolava">cryolava</a> lakes on Triton, seen west of <a href="/wiki/Leviathan_Patera" title="Leviathan Patera">Leviathan Patera</a>. Combined, they are nearly the size of <a href="/wiki/Kraken_Mare" title="Kraken Mare">Kraken Mare</a> on <a href="/wiki/Titan_(moon)" title="Titan (moon)">Titan</a>. These features are unusually crater free, indicating they are young and were recently molten.</div> </li> </ul> <div class="mw-heading mw-heading3"><h3 id="Polar_cap,_plains_and_ridges">Polar cap, plains and ridges</h3> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=9" title="Edit section: Polar cap, plains and ridges" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Triton_(moon).jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/91/Triton_%28moon%29.jpg/220px-Triton_%28moon%29.jpg" decoding="async" width="220" height="178" class="mw-file-element" data-file-width="1137" data-file-height="922"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 178px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/9/91/Triton_%28moon%29.jpg/220px-Triton_%28moon%29.jpg" data-width="220" data-height="178" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/91/Triton_%28moon%29.jpg/330px-Triton_%28moon%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/91/Triton_%28moon%29.jpg/440px-Triton_%28moon%29.jpg 2x" data-class="mw-file-element"> </a><figcaption>Triton's bright south polar cap above a region of cantaloupe terrain</figcaption></figure> Triton's south polar region is covered by a highly reflective cap of frozen nitrogen and methane sprinkled by impact craters and openings of geysers. Little is known about the north pole because it was on the night side during the Voyager 2 encounter, but it is thought that Triton must also have a north polar ice cap.<a href="#cite_note-Duxburyetal1993-60">[50]</a> The high plains found on Triton's eastern hemisphere, such as Cipango Planum, cover over and blot out older features, and are therefore almost certainly the result of icy lava washing over the previous landscape. The plains are dotted with pits, such as <a href="/wiki/Leviathan_Patera" title="Leviathan Patera">Leviathan Patera</a>, which are probably the vents from which this lava emerged. The composition of the lava is unknown, although a mixture of ammonia and water is suspected.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> Four roughly circular "walled plains" have been identified on Triton. They are the flattest regions so far discovered, with a variance in altitude of less than 200 m. They are thought to have formed from the eruption of icy lava.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> The plains near Triton's eastern limb are dotted with black spots, the <a href="/wiki/Macula_(planetary_geology)" title="Macula (planetary geology)">maculae</a>. Some maculae are simple dark spots with diffuse boundaries, and others comprise a dark central patch surrounded by a white halo with sharp boundaries. The maculae typically have diameters of about 100 km and widths of the halos of between 20 and 30 km.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> There are extensive ridges and valleys in complex patterns across Triton's surface, probably the result of freeze–thaw cycles.<a href="#cite_note-Elliot1998-warming-81">[71]</a> Many also appear to be tectonic and may result from an extension or <a href="/wiki/Strike-slip_fault" class="mw-redirect" title="Strike-slip fault">strike-slip faulting</a>.<a href="#cite_note-linea-82">[72]</a> There are long double ridges of ice with central troughs bearing a strong resemblance to <a href="/wiki/Europa_(moon)#Lineae" title="Europa (moon)">Europan lineae</a> (although they have a larger scale<a href="#cite_note-Prockter-83">[73]</a>), and which may have a similar origin,<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> possibly shear heating from strike-slip motion along faults caused by diurnal tidal stresses experienced before Triton's orbit was fully circularized.<a href="#cite_note-Prockter-83">[73]</a> These faults with parallel ridges expelled from the interior cross complex terrain with valleys in the equatorial region. The ridges and furrows, or <a href="/wiki/Sulcus_(geology)" title="Sulcus (geology)">sulci</a>, such as <a href="/w/index.php?title=Yasu_Sulci&action=edit&redlink=1" class="new" title="Yasu Sulci (page does not exist)">Yasu Sulci</a>, <a href="/w/index.php?title=Ho_Sulci&action=edit&redlink=1" class="new" title="Ho Sulci (page does not exist)">Ho Sulci</a>, and <a href="/w/index.php?title=Lo_Sulci&action=edit&redlink=1" class="new" title="Lo Sulci (page does not exist)">Lo Sulci</a>,<a href="#cite_note-Aksnes1990-Nomenclature-84">[74]</a> are thought to be of intermediate age in Triton's geological history, and in many cases to have formed concurrently. They tend to be clustered in groups or "packets".<a href="#cite_note-linea-82">[72]</a> <div class="mw-heading mw-heading3"><h3 id="Cantaloupe_terrain">Cantaloupe terrain</h3> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=10" title="Edit section: Cantaloupe terrain" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:PIA01537_Triton_Faults.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/4/44/PIA01537_Triton_Faults.jpg/220px-PIA01537_Triton_Faults.jpg" decoding="async" width="220" height="215" class="mw-file-element" data-file-width="1894" data-file-height="1854"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 215px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/4/44/PIA01537_Triton_Faults.jpg/220px-PIA01537_Triton_Faults.jpg" data-width="220" data-height="215" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/44/PIA01537_Triton_Faults.jpg/330px-PIA01537_Triton_Faults.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/44/PIA01537_Triton_Faults.jpg/440px-PIA01537_Triton_Faults.jpg 2x" data-class="mw-file-element"> </a><figcaption>Cantaloupe terrain viewed from 130,000 km by <a href="/wiki/Voyager_2" title="Voyager 2">Voyager 2</a>, with crosscutting <a href="/wiki/Europa_(moon)" title="Europa (moon)">Europa</a>-like double ridges. Slidr Sulci (vertical) and Tano Sulci form the prominent "X".</figcaption></figure> Triton's western hemisphere consists of a strange series of fissures and depressions known as "cantaloupe terrain" because it resembles the skin of a <a href="/wiki/Cantaloupe" title="Cantaloupe">cantaloupe</a> melon. Although it has few craters, it is thought that this is the oldest terrain on Triton.<a href="#cite_note-cantaloupe-85">[75]</a> It probably covers much of Triton's western half.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> Cantaloupe terrain, which is mostly dirty water ice, is only known to exist on Triton. It contains depressions 30–40 km in diameter.<a href="#cite_note-cantaloupe-85">[75]</a> The depressions (cavi) are probably not impact craters because they are all of the similar size and have smooth curves. The leading hypothesis for their formation is <a href="/wiki/Diapir" title="Diapir">diapirism</a>, the rising of "lumps" of less dense material through a stratum of denser material.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a><a href="#cite_note-Diapirism-86">[76]</a> Alternative hypotheses include formation by collapses, or by flooding caused by <a href="/wiki/Cryovolcanism" class="mw-redirect" title="Cryovolcanism">cryovolcanism</a>.<a href="#cite_note-cantaloupe-85">[75]</a> <div class="mw-heading mw-heading3"><h3 id="Impact_craters">Impact craters</h3> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=11" title="Edit section: Impact craters" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:PIA01538_Complex_Geologic_History_of_Triton.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d4/PIA01538_Complex_Geologic_History_of_Triton.jpg/220px-PIA01538_Complex_Geologic_History_of_Triton.jpg" decoding="async" width="220" height="222" class="mw-file-element" data-file-width="1885" data-file-height="1903"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 222px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d4/PIA01538_Complex_Geologic_History_of_Triton.jpg/220px-PIA01538_Complex_Geologic_History_of_Triton.jpg" data-width="220" data-height="222" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d4/PIA01538_Complex_Geologic_History_of_Triton.jpg/330px-PIA01538_Complex_Geologic_History_of_Triton.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d4/PIA01538_Complex_Geologic_History_of_Triton.jpg/440px-PIA01538_Complex_Geologic_History_of_Triton.jpg 2x" data-class="mw-file-element"> </a><figcaption>Tuonela Planitia (left) and Ruach Planitia (center) are two of Triton's <a href="/wiki/Cryovolcanic" class="mw-redirect" title="Cryovolcanic">cryovolcanic</a> "walled plains". The paucity of craters is evidence of extensive, relatively recent, geologic activity.</figcaption></figure> Due to constant erasure and modification by ongoing geological activity, <a href="/wiki/Impact_crater" title="Impact crater">impact craters</a> on Triton's surface are relatively rare. A census of Triton's craters imaged by Voyager 2 found only 179 that were incontestably of impact origin, compared with 835 observed for <a href="/wiki/Uranus" title="Uranus">Uranus</a>'s moon <a href="/wiki/Miranda_(moon)" title="Miranda (moon)">Miranda</a>, which has only three percent of Triton's <a href="/wiki/Surface_area" title="Surface area">surface area</a>.<a href="#cite_note-impact-87">[77]</a> The largest crater observed on Triton thought to have been created by an impact is a 27-kilometer-diameter (17 mi) feature called <a href="/w/index.php?title=Mazomba_(crater)&action=edit&redlink=1" class="new" title="Mazomba (crater) (page does not exist)">Mazomba</a>.<a href="#cite_note-impact-87">[77]</a><a href="#cite_note-Ingersoll1990-plumes-88">[78]</a> Although larger craters have been observed, they are generally thought to be volcanic.<a href="#cite_note-impact-87">[77]</a> The few impact craters on Triton are almost all concentrated in the leading hemisphere—that facing the direction of the orbital motion—with the majority concentrated around the equator between 30° and 70° longitude,<a href="#cite_note-impact-87">[77]</a> resulting from material swept up from orbit around Neptune.<a href="#cite_note-Schenk2007-70">[60]</a> Because it orbits with one side permanently facing the planet, astronomers expect that Triton should have fewer impacts on its trailing hemisphere, due to impacts on the leading hemisphere being more frequent and more violent.<a href="#cite_note-impact-87">[77]</a> Voyager 2 imaged only 40% of Triton's surface, so this remains uncertain. However, the observed cratering asymmetry exceeds what can be explained based on the impactor populations, and implies a younger surface age for the crater-free regions (≤ 6 million years old) than for the cratered regions (≤ 50 million years old).<a href="#cite_note-Mah2019-69">[59]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(7)"><h2 id="Observation_and_exploration">Observation and exploration</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=12" title="Edit section: Observation and exploration" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-7 collapsible-block" id="mf-section-7"> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg/220px-PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg" decoding="async" width="220" height="230" class="mw-file-element" data-file-width="1432" data-file-height="1500"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 230px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg/220px-PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg" data-width="220" data-height="230" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/fa/PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg/330px-PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/fa/PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg/440px-PIA23874-NeptuneMoonTriton-TridentMission-20200616.jpg 2x" data-class="mw-file-element"> </a><figcaption>NASA illustration detailing the studies of the proposed Trident mission</figcaption></figure> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Voyager_2_Neptune_and_Triton.jpg" class="mw-file-description"><noscript><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Voyager_2_Neptune_and_Triton.jpg/220px-Voyager_2_Neptune_and_Triton.jpg" decoding="async" width="220" height="165" class="mw-file-element" data-file-width="800" data-file-height="600"></noscript><span class="lazy-image-placeholder" style="width: 220px;height: 165px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Voyager_2_Neptune_and_Triton.jpg/220px-Voyager_2_Neptune_and_Triton.jpg" data-width="220" data-height="165" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Voyager_2_Neptune_and_Triton.jpg/330px-Voyager_2_Neptune_and_Triton.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/2a/Voyager_2_Neptune_and_Triton.jpg/440px-Voyager_2_Neptune_and_Triton.jpg 2x" data-class="mw-file-element"> </a><figcaption>Neptune (top) and Triton (bottom) three days after flyby of Voyager 2</figcaption></figure> The orbital properties of Triton were already determined with high accuracy in the 19th century. It was found to have a retrograde orbit, at a very high angle of inclination to the plane of Neptune's orbit. The first detailed observations of Triton were not made until 1930. Little was known about the satellite until <a href="/wiki/Voyager_2" title="Voyager 2">Voyager 2</a> flew by in 1989.<a href="#cite_note-EncycSolSys-Triton-12">[7]</a> Before the <a href="/wiki/Planetary_flyby" title="Planetary flyby">flyby</a> of Voyager 2, astronomers suspected that Triton might have <a href="/wiki/Liquid_nitrogen" title="Liquid nitrogen">liquid nitrogen</a> seas and a nitrogen/methane atmosphere with a density as much as 30% that of Earth. Like the famous overestimates of the <a href="/wiki/Atmosphere_of_Mars" title="Atmosphere of Mars">atmospheric density of Mars</a>, this proved incorrect. As with Mars, a denser atmosphere is postulated for its early history.<a href="#cite_note-Lunine1992-massive-89">[79]</a> The first attempt to measure the diameter of Triton was made by <a href="/wiki/Gerard_Kuiper" title="Gerard Kuiper">Gerard Kuiper</a> in 1954. He obtained a value of 3,800 km. Subsequent measurement attempts arrived at values ranging from 2,500 to 6,000 km, or from slightly smaller than the Moon (3,474.2 km) to nearly half the diameter of Earth.<a href="#cite_note-Cruikshank1979-diameterreflectance-90">[80]</a> Data from the approach of Voyager 2 to Neptune on August 25, 1989, led to a more accurate estimate of Triton's diameter (2,706 km).<a href="#cite_note-Stone1989-Voyager_2-Neptune-91">[81]</a> In the 1990s, various observations from Earth were made of the limb of Triton using the <a href="/wiki/Occultation" title="Occultation">occultation</a> of nearby stars, which indicated the presence of an atmosphere and an exotic surface. Observations in late 1997 suggest that Triton is heating up and the atmosphere has become significantly denser since Voyager 2 flew past in 1989.<a href="#cite_note-Hubblesite-64">[54]</a> <a href="/wiki/Neptune_Orbiter" class="mw-redirect" title="Neptune Orbiter">New concepts for missions to the Neptune system</a> to be conducted in the 2010s were proposed by <a href="/wiki/NASA" title="NASA">NASA</a> scientists on numerous occasions over the last decades. All of them identified Triton as being a prime target and a separate Triton lander comparable to the <a href="/wiki/Huygens_(spacecraft)" title="Huygens (spacecraft)">Huygens probe</a> for <a href="/wiki/Titan_(moon)" title="Titan (moon)">Titan</a> was frequently included in those plans. No efforts aimed at Neptune and Triton went beyond the proposal phase and NASA's funding for missions to the outer Solar System is currently focused on the Jupiter and Saturn systems.<a href="#cite_note-NASAgov-428154-92">[82]</a> A proposed lander mission to Triton, called <a href="/wiki/Triton_Hopper" title="Triton Hopper">Triton Hopper</a>, would mine nitrogen ice from the surface of Triton and process it to be used as a propellant for a small rocket, enabling it to fly or 'hop' across the surface.<a href="#cite_note-93">[83]</a><a href="#cite_note-Oleson_2015-94">[84]</a> Another concept, involving a flyby, was formally proposed in 2019 as part of NASA's <a href="/wiki/Discovery_Program" title="Discovery Program">Discovery Program</a> under the name <a href="/wiki/Trident_(spacecraft)" title="Trident (spacecraft)">Trident</a>.<a href="#cite_note-NYT-Trident-95">[85]</a> <a href="/wiki/Neptune_Odyssey" title="Neptune Odyssey">Neptune Odyssey</a> is a mission concept for a Neptune orbiter with a focus on Triton being studied beginning April 2021 as a possible <a href="/wiki/Large_strategic_science_mission" class="mw-redirect" title="Large strategic science mission">large strategic science mission</a> by NASA that would launch in 2033 and arrive at the Neptune system in 2049.<a href="#cite_note-Rymer-96">[86]</a> Two lower-cost mission concepts were subsequently developed for the <a href="/wiki/New_Frontiers_program" title="New Frontiers program">New Frontiers program</a>: the first the following June and the second in 2023. The first is Triton Ocean World Surveyor, which would launch in 2031 and arrive in 2047,<a href="#cite_note-TOWS-97">[87]</a> and the second is Nautilus, which would launch August 2042 and arrive in April 2057.<a href="#cite_note-Steckel_Conrad_Dekarske_Dolan_2023-98">[88]</a><a href="#cite_note-Jason_Dekarske_2023-22">[16]</a> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(8)"><h2 id="Maps">Maps</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=13" title="Edit section: Maps" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-8 collapsible-block" id="mf-section-8"> <table align="center"> <tbody><tr> <td><div class="noresize thumb tnone" style=";"> <div class="thumbinner" style="overflow:hidden;width:402px;"> <div class="thumbimage" style="height:206px; overflow:hidden; position:relative; background-color:white;"> <div style=";left:0px; top:0px; width:400px; position:absolute;"> <a href="/wiki/File:PIA18668_Map_of_Triton.jpg" class="mw-file-description" title="Enhanced-color map; leading hemisphere is on right"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/400px-PIA18668_Map_of_Triton.jpg" decoding="async" width="400" height="255" class="mw-file-element" data-file-width="14938" data-file-height="9534"></noscript><span class="lazy-image-placeholder" style="width: 400px;height: 255px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/400px-PIA18668_Map_of_Triton.jpg" data-alt="" data-width="400" data-height="255" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/600px-PIA18668_Map_of_Triton.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/800px-PIA18668_Map_of_Triton.jpg 2x" data-class="mw-file-element"> </a></div> <div style="text-align:left; background-color:transparent; line-height:110%;"> </div> <div style="visibility:hidden"><a href="/wiki/File:PIA18668_Map_of_Triton.jpg" class="mw-file-description"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/400px-PIA18668_Map_of_Triton.jpg" decoding="async" width="400" height="255" class="mw-file-element" data-file-width="14938" data-file-height="9534"></noscript><span class="lazy-image-placeholder" style="width: 400px;height: 255px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/400px-PIA18668_Map_of_Triton.jpg" data-alt="" data-width="400" data-height="255" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/600px-PIA18668_Map_of_Triton.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/PIA18668_Map_of_Triton.jpg/800px-PIA18668_Map_of_Triton.jpg 2x" data-class="mw-file-element"> </a></div> </div> <div class="thumbcaption"><div class="magnify"><a href="/wiki/File:PIA18668_Map_of_Triton.jpg" title="File:PIA18668 Map of Triton.jpg"> </a></div>Enhanced-color map; leading hemisphere is on right</div> </div></div> </td> <td><div class="noresize thumb tnone" style=";"> <div class="thumbinner" style="overflow:hidden;width:402px;"> <div class="thumbimage" style="height:198px; overflow:hidden; position:relative; background-color:white;"> <div style=";left:0px; top:0px; width:400px; position:absolute;"> <a href="/wiki/File:Triton_polar_maps.jpg" class="mw-file-description" title="Enhanced-color polar maps; south is right"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/400px-Triton_polar_maps.jpg" decoding="async" width="400" height="274" class="mw-file-element" data-file-width="10492" data-file-height="7197"></noscript><span class="lazy-image-placeholder" style="width: 400px;height: 274px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/400px-Triton_polar_maps.jpg" data-alt="" data-width="400" data-height="274" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/600px-Triton_polar_maps.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/800px-Triton_polar_maps.jpg 2x" data-class="mw-file-element"> </a></div> <div style="text-align:left; background-color:transparent; line-height:110%;"> </div> <div style="visibility:hidden"><a href="/wiki/File:Triton_polar_maps.jpg" class="mw-file-description"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/400px-Triton_polar_maps.jpg" decoding="async" width="400" height="274" class="mw-file-element" data-file-width="10492" data-file-height="7197"></noscript><span class="lazy-image-placeholder" style="width: 400px;height: 274px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/400px-Triton_polar_maps.jpg" data-alt="" data-width="400" data-height="274" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/600px-Triton_polar_maps.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/2/24/Triton_polar_maps.jpg/800px-Triton_polar_maps.jpg 2x" data-class="mw-file-element"> </a></div> </div> <div class="thumbcaption"><div class="magnify"><a href="/wiki/File:Triton_polar_maps.jpg" title="File:Triton polar maps.jpg"> </a></div>Enhanced-color polar maps; south is right</div> </div></div> </td></tr></tbody></table> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(9)"><h2 id="See_also">See also</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=14" title="Edit section: See also" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-9 collapsible-block" id="mf-section-9"> <style data-mw-deduplicate="TemplateStyles:r1239009302">.mw-parser-output .portalbox{padding:0;margin:0.5em 0;display:table;box-sizing:border-box;max-width:175px;list-style:none}.mw-parser-output .portalborder{border:1px solid var(--border-color-base,#a2a9b1);padding:0.1em;background:var(--background-color-neutral-subtle,#f8f9fa)}.mw-parser-output .portalbox-entry{display:table-row;font-size:85%;line-height:110%;height:1.9em;font-style:italic;font-weight:bold}.mw-parser-output .portalbox-image{display:table-cell;padding:0.2em;vertical-align:middle;text-align:center}.mw-parser-output .portalbox-link{display:table-cell;padding:0.2em 0.2em 0.2em 0.3em;vertical-align:middle}@media(min-width:720px){.mw-parser-output .portalleft{clear:left;float:left;margin:0.5em 1em 0.5em 0}.mw-parser-output .portalright{clear:right;float:right;margin:0.5em 0 0.5em 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src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Earth-moon.jpg/32px-Earth-moon.jpg" decoding="async" width="32" height="26" class="mw-file-element" data-file-width="3000" data-file-height="2400"></noscript><span class="lazy-image-placeholder" style="width: 32px;height: 26px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Earth-moon.jpg/32px-Earth-moon.jpg" data-alt="" data-width="32" data-height="26" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Earth-moon.jpg/48px-Earth-moon.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Earth-moon.jpg/64px-Earth-moon.jpg 2x" data-class="mw-file-element"> <a href="/wiki/Portal:Outer_space" title="Portal:Outer space">Outer space portal</a></li><li class="portalbox-entry"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/28px-Crab_Nebula.jpg" decoding="async" width="28" height="28" class="mw-file-element" data-file-width="3864" data-file-height="3864"></noscript><span class="lazy-image-placeholder" style="width: 28px;height: 28px;" data-src="//upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/28px-Crab_Nebula.jpg" data-alt="" data-width="28" data-height="28" data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/42px-Crab_Nebula.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/00/Crab_Nebula.jpg/56px-Crab_Nebula.jpg 2x" data-class="mw-file-element"> <a href="/wiki/Portal:Astronomy" title="Portal:Astronomy">Astronomy portal</a></li></ul> <style data-mw-deduplicate="TemplateStyles:r1184024115">.mw-parser-output .div-col{margin-top:0.3em;column-width:30em}.mw-parser-output .div-col-small{font-size:90%}.mw-parser-output .div-col-rules{column-rule:1px solid #aaa}.mw-parser-output .div-col dl,.mw-parser-output .div-col ol,.mw-parser-output .div-col ul{margin-top:0}.mw-parser-output .div-col li,.mw-parser-output .div-col dd{page-break-inside:avoid;break-inside:avoid-column}</style><div class="div-col" style="column-width: 20em;"> <ul><li><a href="/wiki/List_of_natural_satellites" title="List of natural satellites">List of natural satellites</a></li> <li><a href="/wiki/Geology_of_Triton" title="Geology of Triton">Geology of Triton</a></li> <li><a href="/wiki/Neptune_in_fiction" title="Neptune in fiction">Neptune in fiction</a></li> <li><a href="/wiki/Triton_Hopper" title="Triton Hopper">Triton Hopper</a>, a proposed lander to Triton</li> <li><a href="/wiki/Extraterrestrial_sky#The_sky_of_Triton" title="Extraterrestrial sky">Triton's sky</a></li> <li><a href="/wiki/Shensuo" class="mw-redirect" title="Shensuo">Shensuo</a>, a proposed mission that would flyby Triton</li></ul> </div> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(10)"><h2 id="Notes">Notes</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=15" title="Edit section: Notes" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-10 collapsible-block" id="mf-section-10"> <style data-mw-deduplicate="TemplateStyles:r1239543626">.mw-parser-output .reflist{margin-bottom:0.5em;list-style-type:decimal}@media screen{.mw-parser-output .reflist{font-size:90%}}.mw-parser-output .reflist .references{font-size:100%;margin-bottom:0;list-style-type:inherit}.mw-parser-output .reflist-columns-2{column-width:30em}.mw-parser-output .reflist-columns-3{column-width:25em}.mw-parser-output .reflist-columns{margin-top:0.3em}.mw-parser-output .reflist-columns ol{margin-top:0}.mw-parser-output .reflist-columns li{page-break-inside:avoid;break-inside:avoid-column}.mw-parser-output .reflist-upper-alpha{list-style-type:upper-alpha}.mw-parser-output .reflist-upper-roman{list-style-type:upper-roman}.mw-parser-output .reflist-lower-alpha{list-style-type:lower-alpha}.mw-parser-output .reflist-lower-greek{list-style-type:lower-greek}.mw-parser-output .reflist-lower-roman{list-style-type:lower-roman}</style><div class="reflist"> </div> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-calculated-4"><a href="#cite_ref-calculated_4-0">^</a> Calculated on the basis of other parameters. </li> <li id="cite_note-nSurfaceArea-8"><a href="#cite_ref-nSurfaceArea_8-0">^</a> Surface area derived from the radius r: <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle 4\pi r^{2}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mn>4</mn> <mi>π</mi> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle 4\pi r^{2}}</annotation> </semantics> </math><noscript><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b81fcce302776a01dc66fc186a1ce0a616b4d772" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -0.338ex; width:4.597ex; height:2.676ex;" alt="{\displaystyle 4\pi r^{2}}"></noscript><span class="lazy-image-placeholder" style="width: 4.597ex;height: 2.676ex;vertical-align: -0.338ex;" data-src="https://wikimedia.org/api/rest_v1/media/math/render/svg/b81fcce302776a01dc66fc186a1ce0a616b4d772" data-alt="{\displaystyle 4\pi r^{2}}" data-class="mwe-math-fallback-image-inline mw-invert skin-invert"> . </li> <li id="cite_note-nVolume-9"><a href="#cite_ref-nVolume_9-0">^</a> Volume v derived from the radius r: <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {4}{3}}\pi r^{3}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mn>4</mn> <mn>3</mn> </mfrac> </mrow> <mi>π</mi> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>3</mn> </mrow> </msup> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {4}{3}}\pi r^{3}}</annotation> </semantics> </math><noscript><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7112cb504e1399319cb9edbc622d1c4609fd56e3" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:5.433ex; height:5.176ex;" alt="{\displaystyle {\frac {4}{3}}\pi r^{3}}"></noscript><span class="lazy-image-placeholder" style="width: 5.433ex;height: 5.176ex;vertical-align: -1.838ex;" data-src="https://wikimedia.org/api/rest_v1/media/math/render/svg/7112cb504e1399319cb9edbc622d1c4609fd56e3" data-alt="{\displaystyle {\frac {4}{3}}\pi r^{3}}" data-class="mwe-math-fallback-image-inline mw-invert skin-invert"> . </li> <li id="cite_note-nSurfaceGravity-10"><a href="#cite_ref-nSurfaceGravity_10-0">^</a> Surface gravity derived from the mass m, the <a href="/wiki/Gravitational_constant" title="Gravitational constant">gravitational constant</a> G and the radius r: <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\frac {Gm}{r^{2}}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <mfrac> <mrow> <mi>G</mi> <mi>m</mi> </mrow> <msup> <mi>r</mi> <mrow class="MJX-TeXAtom-ORD"> <mn>2</mn> </mrow> </msup> </mfrac> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\frac {Gm}{r^{2}}}}</annotation> </semantics> </math><noscript><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/3bc97461a59646cbc67b1bb4aec9323878ced62c" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -2.171ex; width:4.703ex; height:5.676ex;" alt="{\displaystyle {\frac {Gm}{r^{2}}}}"></noscript><span class="lazy-image-placeholder" style="width: 4.703ex;height: 5.676ex;vertical-align: -2.171ex;" data-src="https://wikimedia.org/api/rest_v1/media/math/render/svg/3bc97461a59646cbc67b1bb4aec9323878ced62c" data-alt="{\displaystyle {\frac {Gm}{r^{2}}}}" data-class="mwe-math-fallback-image-inline mw-invert skin-invert"> . </li> <li id="cite_note-nEscapeVelocity-11"><a href="#cite_ref-nEscapeVelocity_11-0">^</a> Escape velocity derived from the mass m, the <a href="/wiki/Gravitational_constant" title="Gravitational constant">gravitational constant</a> G and the radius r: <math xmlns="http://www.w3.org/1998/Math/MathML" alttext="{\displaystyle {\sqrt {2Gm/r}}}"> <semantics> <mrow class="MJX-TeXAtom-ORD"> <mstyle displaystyle="true" scriptlevel="0"> <mrow class="MJX-TeXAtom-ORD"> <msqrt> <mn>2</mn> <mi>G</mi> <mi>m</mi> <mrow class="MJX-TeXAtom-ORD"> <mo>/</mo> </mrow> <mi>r</mi> </msqrt> </mrow> </mstyle> </mrow> <annotation encoding="application/x-tex">{\displaystyle {\sqrt {2Gm/r}}}</annotation> </semantics> </math><noscript><img src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f84d4ad61a8cd58039f632caeeb931a51d7aa27f" class="mwe-math-fallback-image-inline mw-invert skin-invert" aria-hidden="true" style="vertical-align: -1.838ex; width:9.564ex; height:4.843ex;" alt="{\displaystyle {\sqrt {2Gm/r}}}"></noscript><span class="lazy-image-placeholder" style="width: 9.564ex;height: 4.843ex;vertical-align: -1.838ex;" data-src="https://wikimedia.org/api/rest_v1/media/math/render/svg/f84d4ad61a8cd58039f632caeeb931a51d7aa27f" data-alt="{\displaystyle {\sqrt {2Gm/r}}}" data-class="mwe-math-fallback-image-inline mw-invert skin-invert"> . </li> <li id="cite_note-AxialTilt-13"><a href="#cite_ref-AxialTilt_13-0">^</a> With respect to Triton's orbit about Neptune. </li> <li id="cite_note-26"><a href="#cite_ref-26">^</a> Lassell rejected his previous claim of discovery when he found that the orientation of the supposed rings changed when he rotated his telescope tube; see p. 9 of Smith & Baum, 1984.<a href="#cite_note-Smithetal1984-25">[19]</a> </li> <li id="cite_note-nLargest-31"><a href="#cite_ref-nLargest_31-0">^</a> Largest <a href="/wiki/Irregular_moon" title="Irregular moon">irregular moons</a>: Saturn's <a href="/wiki/Phoebe_(moon)" title="Phoebe (moon)">Phoebe</a> (210 km), Uranus's <a href="/wiki/Sycorax_(moon)" title="Sycorax (moon)">Sycorax</a> (160 km), and Jupiter's <a href="/wiki/Himalia_(moon)" title="Himalia (moon)">Himalia</a> (140 km) </li> <li id="cite_note-nMassTriton-42"><a href="#cite_ref-nMassTriton_42-0">^</a> Mass of Triton: 2.14×1022 kg. Combined mass of 12 other known moons of Neptune: 7.53×1019 kg, or 0.35%. The mass of the rings is negligible. </li> <li id="cite_note-nMassOthers-43"><a href="#cite_ref-nMassOthers_43-0">^</a> The masses of other spherical moons are: <a href="/wiki/Titania_(moon)" title="Titania (moon)">Titania</a>—3.5×1021, <a href="/wiki/Oberon_(moon)" title="Oberon (moon)">Oberon</a>—3.1×1021, <a href="/wiki/Rhea_(moon)" title="Rhea (moon)">Rhea</a>—2.3×1021, <a href="/wiki/Iapetus_(moon)" title="Iapetus (moon)">Iapetus</a>—1.8×1021, <a href="/wiki/Charon_(moon)" title="Charon (moon)">Charon</a>—1.6×1021, <a href="/wiki/Ariel_(moon)" title="Ariel (moon)">Ariel</a>—1.2×1021, <a href="/wiki/Umbriel" title="Umbriel">Umbriel</a>—1.3×1021, <a href="/wiki/Dione_(moon)" title="Dione (moon)">Dione</a>—1.1×1021, <a href="/wiki/Tethys_(moon)" title="Tethys (moon)">Tethys</a>—0.6×1021, <a href="/wiki/Enceladus" title="Enceladus">Enceladus</a>—0.11×1021, <a href="/wiki/Miranda_(moon)" title="Miranda (moon)">Miranda</a>—0.06×1021, <a href="/wiki/Mimas" title="Mimas">Mimas</a>—0.04×1021. The total mass of remaining moons is about 0.12×1021. So, the total mass of all moons smaller than Triton is about 1.68×1022. (See <a href="/wiki/List_of_Solar_System_objects_by_size" title="List of Solar System objects by size">List of Solar System objects by size</a>) </li> </ol></div></div> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(11)"><h2 id="References">References</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=16" title="Edit section: References" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-11 collapsible-block" id="mf-section-11"> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239543626"><div class="reflist reflist-columns references-column-width" style="column-width: 30em;"> <ol class="references"> <li id="cite_note-1"><a href="#cite_ref-1">^</a> Robert Graves (1945) Hercules, My Shipmate </li> <li id="cite_note-neptuniansatfact-2">^ <a href="#cite_ref-neptuniansatfact_2-0">a</a> <a href="#cite_ref-neptuniansatfact_2-1">b</a> <a href="#cite_ref-neptuniansatfact_2-2">c</a> <style data-mw-deduplicate="TemplateStyles:r1238218222">.mw-parser-output cite.citation{font-style:inherit;word-wrap:break-word}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation:target{background-color:rgba(0,127,255,0.133)}.mw-parser-output .id-lock-free.id-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/6/65/Lock-green.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-limited.id-lock-limited a,.mw-parser-output .id-lock-registration.id-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/d/d6/Lock-gray-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .id-lock-subscription.id-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/a/aa/Lock-red-alt-2.svg")right 0.1em center/9px no-repeat}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/4/4c/Wikisource-logo.svg")right 0.1em center/12px no-repeat}body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-free a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-limited a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-registration a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .id-lock-subscription a,body:not(.skin-timeless):not(.skin-minerva) .mw-parser-output .cs1-ws-icon a{background-size:contain;padding:0 1em 0 0}.mw-parser-output .cs1-code{color:inherit;background:inherit;border:none;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;color:var(--color-error,#d33)}.mw-parser-output .cs1-visible-error{color:var(--color-error,#d33)}.mw-parser-output .cs1-maint{display:none;color:#085;margin-left:0.3em}.mw-parser-output .cs1-kern-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right{padding-right:0.2em}.mw-parser-output .citation .mw-selflink{font-weight:inherit}@media screen{.mw-parser-output .cs1-format{font-size:95%}html.skin-theme-clientpref-night .mw-parser-output .cs1-maint{color:#18911f}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .cs1-maint{color:#18911f}}</style><cite id="CITEREFWilliams,_David_R.2006" class="citation web cs1">Williams, David R. 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Retrieved March 20, 2019.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+New+York+Times&rft.atitle=Neptune%27s+Moon+Triton+Is+Destination+of+Proposed+NASA+Mission&rft.date=2019-03-19&rft.aulast=Brown&rft.aufirst=David+W.&rft_id=https%3A%2F%2Fwww.nytimes.com%2F2019%2F03%2F19%2Fscience%2Ftriton-neptune-nasa-trident.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATriton+%28moon%29" class="Z3988"> </li> <li id="cite_note-Rymer-96"><a href="#cite_ref-Rymer_96-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFAbigail_RymerBrenda_ClydeKirby_Runyon2020" class="citation web cs1">Abigail Rymer; Brenda Clyde; Kirby Runyon (August 2020). <a rel="nofollow" class="external text" href="https://web.archive.org/web/20201215003151/https://science.nasa.gov/science-pink/s3fs-public/atoms/files/Neptune%20Odyssey.pdf">"Neptune Odyssey: Mission to the Neptune-Triton System"</a> (PDF). Archived from <a rel="nofollow" class="external text" href="https://science.nasa.gov/science-pink/s3fs-public/atoms/files/Neptune%20Odyssey.pdf">the original</a> (PDF) on December 15, 2020. Retrieved April 18, 2021.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Neptune+Odyssey%3A+Mission+to+the+Neptune-Triton+System&rft.date=2020-08&rft.au=Abigail+Rymer&rft.au=Brenda+Clyde&rft.au=Kirby+Runyon&rft_id=https%3A%2F%2Fscience.nasa.gov%2Fscience-pink%2Fs3fs-public%2Fatoms%2Ffiles%2FNeptune%2520Odyssey.pdf&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATriton+%28moon%29" class="Z3988"> </li> <li id="cite_note-TOWS-97"><a href="#cite_ref-TOWS_97-0">^</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHansen-KoharcheckFielhauer2021" class="citation web cs1">Hansen-Koharcheck, Candice; Fielhauer, Karl (June 7, 2021). <a rel="nofollow" class="external text" href="https://science.nasa.gov/wp-content/uploads/2023/10/t-ows-triton-ocean-worlds-surveyor.pdf">"Triton Ocean Worlds Surveyor concept study"</a> (PDF). 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C. (December 12, 2023). <a rel="nofollow" class="external text" href="https://agu.confex.com/agu/fm23/meetingapp.cgi/Paper/1425806">"The Science Case for Nautilus: A Multi-Flyby Mission Concept to Triton"</a>. AGU. Retrieved January 11, 2024.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=The+Science+Case+for+Nautilus%3A+A+Multi-Flyby+Mission+Concept+to+Triton&rft.pub=AGU&rft.date=2023-12-12&rft.aulast=Steckel&rft.aufirst=Amanda&rft.au=Conrad%2C+Jack+William&rft.au=Dekarske%2C+Jason&rft.au=Dolan%2C+Sydney&rft.au=Downey%2C+Brynna+Grace&rft.au=Felton%2C+Ryan&rft.au=Hanson%2C+Lavender+Elle&rft.au=Giesche%2C+Alena&rft.au=Horvath%2C+Tyler&rft.au=Maxwell%2C+Rachel&rft.au=Shumway%2C+Andrew+O&rft.au=Siddique%2C+Anamika&rft.au=Strom%2C+Caleb&rft.au=Teece%2C+Bronwyn&rft.au=Todd%2C+Jessica&rft.au=Trinh%2C+Kevin+T&rft.au=Velez%2C+Michael+A&rft.au=Walter%2C+Callum+Andrew&rft.au=Lowes%2C+Leslie+L&rft.au=Hudson%2C+Troy&rft.au=Scully%2C+Jennifer+E.+C.&rft_id=https%3A%2F%2Fagu.confex.com%2Fagu%2Ffm23%2Fmeetingapp.cgi%2FPaper%2F1425806&rfr_id=info%3Asid%2Fen.wikipedia.org%3ATriton+%28moon%29" class="Z3988"> </li> </ol></div> </section><div class="mw-heading mw-heading2 section-heading" onclick="mfTempOpenSection(12)"><h2 id="External_links">External links</h2> <a role="button" href="/w/index.php?title=Triton_(moon)&action=edit&section=17" title="Edit section: External links" class="cdx-button cdx-button--size-large cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--icon-only cdx-button--weight-quiet "> edit </a> </div><section class="mf-section-12 collapsible-block" id="mf-section-12"> <style data-mw-deduplicate="TemplateStyles:r1235681985">.mw-parser-output .side-box{margin:4px 0;box-sizing:border-box;border:1px solid #aaa;font-size:88%;line-height:1.25em;background-color:var(--background-color-interactive-subtle,#f8f9fa);display:flow-root}.mw-parser-output .side-box-abovebelow,.mw-parser-output .side-box-text{padding:0.25em 0.9em}.mw-parser-output .side-box-image{padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .side-box-imageright{padding:2px 0.9em 2px 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ul{line-height:inherit;list-style:none;margin:0;padding:0}.mw-parser-output .plainlist ol li,.mw-parser-output .plainlist ul li{margin-bottom:0}</style> <div class="side-box-flex"> <div class="side-box-image"><noscript><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" decoding="async" width="30" height="40" class="mw-file-element" data-file-width="1024" data-file-height="1376"></noscript><span class="lazy-image-placeholder" style="width: 30px;height: 40px;" data-src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png" data-alt="" data-width="30" data-height="40" data-srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/45px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/59px-Commons-logo.svg.png 2x" data-class="mw-file-element"> </div> <div class="side-box-text plainlist">Wikimedia Commons has media related to <a href="https://commons.wikimedia.org/wiki/Category:Triton_(moon)" class="extiw" title="commons:Category:Triton (moon)">Triton (moon)</a>.</div></div> </div> <ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20161012075648/http://solarsystem.nasa.gov/planets/triton">Triton profile</a> at NASA's Solar System Exploration site</li> <li><a rel="nofollow" class="external text" href="https://www.youtube.com/watch?v=h82GNysAH_w">Voyager 2 Encounters Neptune and Triton (1989)</a> on <a href="/wiki/YouTube_video_(identifier)" class="mw-redirect" title="YouTube video (identifier)">YouTube</a></li> <li><a rel="nofollow" class="external text" href="http://nineplanets.org/triton.html">Triton page</a> at The Nine Planets</li> <li><a rel="nofollow" class="external text" href="http://solarviews.com/eng/triton.htm">Triton page</a> (including <a rel="nofollow" class="external text" href="http://www.solarviews.com/eng/trimap.htm">labelled Triton map</a>) at Views of the Solar System</li> <li><a rel="nofollow" class="external text" href="http://www.lpi.usra.edu/icy_moons/neptune/triton/">Triton map</a> from Paul Schenk, Lunar and Planetary Institute</li> <li><a rel="nofollow" class="external text" href="https://photojournal.jpl.nasa.gov/target/Triton">Triton images</a> from the NASA/JPL Photojournal</li> <li><a rel="nofollow" class="external text" href="https://planetarynames.wr.usgs.gov/Page/TRITON/target">Triton nomenclature</a> from the USGS Planetary Nomenclature website</li></ul> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl 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data-srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/83/Solar_system.jpg/23px-Solar_system.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/83/Solar_system.jpg/30px-Solar_system.jpg 2x" data-class="mw-file-element">  <a href="/wiki/Portal:Solar_System" title="Portal:Solar System">Solar System</a></li></ul></div> <div class="navbox-styles"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1236075235"><style data-mw-deduplicate="TemplateStyles:r1038841319">.mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}</style></div>    </section></div> <noscript><img src="https://login.m.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&mobile=1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Triton_(moon)&oldid=1259003650">https://en.wikipedia.org/w/index.php?title=Triton_(moon)&oldid=1259003650</a>"</div></div> </div> <div class="post-content" id="page-secondary-actions"> </div> </main> <footer class="mw-footer minerva-footer" role="contentinfo"> <a class="last-modified-bar" href="/w/index.php?title=Triton_(moon)&action=history"> <div class="post-content last-modified-bar__content"> Last edited on 22 November 2024, at 21:21 </div> </a> <div class="post-content footer-content"> <div id='mw-data-after-content'> <div class="read-more-container"></div> </div> <div id="p-lang"> <h4>Languages</h4> <section> <ul id="p-variants" class="minerva-languages"></ul> <ul class="minerva-languages"><li class="interlanguage-link interwiki-af badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://af.wikipedia.org/wiki/Triton_(maan)" title="Triton (maan) – Afrikaans" lang="af" hreflang="af" data-title="Triton (maan)" data-language-autonym="Afrikaans" data-language-local-name="Afrikaans" class="interlanguage-link-target">Afrikaans</a></li><li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%AA%D8%B1%D8%A7%D9%8A%D8%AA%D9%88%D9%86_(%D9%82%D9%85%D8%B1)" title="ترايتون (قمر) – Arabic" lang="ar" hreflang="ar" data-title="ترايتون (قمر)" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target">العربية</a></li><li class="interlanguage-link interwiki-an mw-list-item"><a href="https://an.wikipedia.org/wiki/Trit%C3%B3n_(satelite)" title="Tritón (satelite) – Aragonese" lang="an" hreflang="an" data-title="Tritón (satelite)" data-language-autonym="Aragonés" data-language-local-name="Aragonese" class="interlanguage-link-target">Aragonés</a></li><li class="interlanguage-link interwiki-frp mw-list-item"><a href="https://frp.wikipedia.org/wiki/Triton_(sat%C3%A8lite)" title="Triton (satèlite) – Arpitan" lang="frp" hreflang="frp" data-title="Triton (satèlite)" data-language-autonym="Arpetan" data-language-local-name="Arpitan" class="interlanguage-link-target">Arpetan</a></li><li class="interlanguage-link interwiki-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Trit%C3%B3n_(sat%C3%A9lite)" title="Tritón (satélite) – Asturian" lang="ast" hreflang="ast" data-title="Tritón (satélite)" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target">Asturianu</a></li><li class="interlanguage-link interwiki-az mw-list-item"><a href="https://az.wikipedia.org/wiki/Triton_(peyk)" title="Triton (peyk) – Azerbaijani" lang="az" hreflang="az" data-title="Triton (peyk)" data-language-autonym="Azərbaycanca" data-language-local-name="Azerbaijani" class="interlanguage-link-target">Azərbaycanca</a></li><li class="interlanguage-link interwiki-azb mw-list-item"><a href="https://azb.wikipedia.org/wiki/%D8%AA%D8%B1%DB%8C%D8%AA%D9%88%D9%86_(%D9%82%D9%85%D8%B1)" title="تریتون (قمر) – South Azerbaijani" lang="azb" hreflang="azb" data-title="تریتون (قمر)" data-language-autonym="تۆرکجه" data-language-local-name="South Azerbaijani" class="interlanguage-link-target">تۆرکجه</a></li><li class="interlanguage-link interwiki-bn mw-list-item"><a href="https://bn.wikipedia.org/wiki/%E0%A6%9F%E0%A7%8D%E0%A6%B0%E0%A6%BE%E0%A6%87%E0%A6%9F%E0%A6%A8_(%E0%A6%89%E0%A6%AA%E0%A6%97%E0%A7%8D%E0%A6%B0%E0%A6%B9)" title="ট্রাইটন (উপগ্রহ) – Bangla" lang="bn" hreflang="bn" data-title="ট্রাইটন (উপগ্রহ)" data-language-autonym="বাংলা" data-language-local-name="Bangla" class="interlanguage-link-target">বাংলা</a></li><li class="interlanguage-link interwiki-zh-min-nan mw-list-item"><a href="https://zh-min-nan.wikipedia.org/wiki/Triton_(o%C4%93-chhe%E2%81%BF)" title="Triton (oē-chheⁿ) – Minnan" lang="nan" hreflang="nan" data-title="Triton (oē-chheⁿ)" data-language-autonym="閩南語 / Bân-lâm-gú" data-language-local-name="Minnan" class="interlanguage-link-target">閩南語 / Bân-lâm-gú</a></li><li class="interlanguage-link interwiki-ba mw-list-item"><a href="https://ba.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD_(%D1%8E%D0%BB%D0%B4%D0%B0%D1%88)" title="Тритон (юлдаш) – Bashkir" lang="ba" hreflang="ba" data-title="Тритон (юлдаш)" data-language-autonym="Башҡортса" data-language-local-name="Bashkir" class="interlanguage-link-target">Башҡортса</a></li><li class="interlanguage-link interwiki-be mw-list-item"><a href="https://be.wikipedia.org/wiki/%D0%A2%D1%80%D1%8B%D1%82%D0%BE%D0%BD_(%D1%81%D0%BF%D0%B0%D0%B4%D0%B0%D1%80%D0%BE%D0%B6%D0%BD%D1%96%D0%BA)" title="Трытон (спадарожнік) – Belarusian" lang="be" hreflang="be" data-title="Трытон (спадарожнік)" data-language-autonym="Беларуская" data-language-local-name="Belarusian" class="interlanguage-link-target">Беларуская</a></li><li class="interlanguage-link interwiki-be-x-old mw-list-item"><a href="https://be-tarask.wikipedia.org/wiki/%D0%A2%D1%80%D1%8B%D1%82%D0%BE%D0%BD_(%D1%81%D0%BF%D0%B0%D0%B4%D0%B0%D1%80%D0%BE%D0%B6%D0%BD%D1%96%D0%BA_%D0%9D%D1%8D%D0%BF%D1%82%D1%83%D0%BD%D0%B0)" title="Трытон (спадарожнік Нэптуна) – Belarusian (Taraškievica orthography)" lang="be-tarask" hreflang="be-tarask" data-title="Трытон (спадарожнік Нэптуна)" data-language-autonym="Беларуская (тарашкевіца)" data-language-local-name="Belarusian (Taraškievica orthography)" class="interlanguage-link-target">Беларуская (тарашкевіца)</a></li><li class="interlanguage-link interwiki-bg mw-list-item"><a href="https://bg.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD_(%D1%81%D0%BF%D1%8A%D1%82%D0%BD%D0%B8%D0%BA)" title="Тритон (спътник) – Bulgarian" lang="bg" hreflang="bg" data-title="Тритон (спътник)" data-language-autonym="Български" data-language-local-name="Bulgarian" class="interlanguage-link-target">Български</a></li><li class="interlanguage-link interwiki-bs mw-list-item"><a href="https://bs.wikipedia.org/wiki/Triton_(mjesec)" title="Triton (mjesec) – Bosnian" lang="bs" hreflang="bs" data-title="Triton (mjesec)" data-language-autonym="Bosanski" data-language-local-name="Bosnian" class="interlanguage-link-target">Bosanski</a></li><li class="interlanguage-link interwiki-br mw-list-item"><a href="https://br.wikipedia.org/wiki/Triton_(loarenn)" title="Triton (loarenn) – Breton" lang="br" hreflang="br" data-title="Triton (loarenn)" data-language-autonym="Brezhoneg" data-language-local-name="Breton" class="interlanguage-link-target">Brezhoneg</a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Trit%C3%B3_(sat%C3%A8l%C2%B7lit)" title="Tritó (satèl·lit) – Catalan" lang="ca" hreflang="ca" data-title="Tritó (satèl·lit)" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target">Català</a></li><li class="interlanguage-link interwiki-cv mw-list-item"><a href="https://cv.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD_(%C3%A7%D1%83%D0%BB%D1%82%D0%B0%D1%88)" title="Тритон (çулташ) – Chuvash" lang="cv" hreflang="cv" data-title="Тритон (çулташ)" data-language-autonym="Чӑвашла" data-language-local-name="Chuvash" class="interlanguage-link-target">Чӑвашла</a></li><li class="interlanguage-link interwiki-cs badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://cs.wikipedia.org/wiki/Triton_(m%C4%9Bs%C3%ADc)" title="Triton (měsíc) – Czech" lang="cs" hreflang="cs" data-title="Triton (měsíc)" data-language-autonym="Čeština" data-language-local-name="Czech" class="interlanguage-link-target">Čeština</a></li><li class="interlanguage-link interwiki-co mw-list-item"><a href="https://co.wikipedia.org/wiki/Tritone" title="Tritone – Corsican" lang="co" hreflang="co" data-title="Tritone" data-language-autonym="Corsu" data-language-local-name="Corsican" class="interlanguage-link-target">Corsu</a></li><li class="interlanguage-link interwiki-cy mw-list-item"><a href="https://cy.wikipedia.org/wiki/Triton_(lloeren)" title="Triton (lloeren) – Welsh" lang="cy" hreflang="cy" data-title="Triton (lloeren)" data-language-autonym="Cymraeg" data-language-local-name="Welsh" class="interlanguage-link-target">Cymraeg</a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Triton_(m%C3%A5ne)" title="Triton (måne) – Danish" lang="da" hreflang="da" data-title="Triton (måne)" data-language-autonym="Dansk" data-language-local-name="Danish" class="interlanguage-link-target">Dansk</a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Triton_(Mond)" title="Triton (Mond) – German" lang="de" hreflang="de" data-title="Triton (Mond)" data-language-autonym="Deutsch" data-language-local-name="German" class="interlanguage-link-target">Deutsch</a></li><li class="interlanguage-link interwiki-et mw-list-item"><a href="https://et.wikipedia.org/wiki/Triton_(kuu)" title="Triton (kuu) – Estonian" lang="et" hreflang="et" data-title="Triton (kuu)" data-language-autonym="Eesti" data-language-local-name="Estonian" class="interlanguage-link-target">Eesti</a></li><li class="interlanguage-link interwiki-el mw-list-item"><a href="https://el.wikipedia.org/wiki/%CE%A4%CF%81%CE%AF%CF%84%CF%89%CE%BD%CE%B1%CF%82_(%CE%B4%CE%BF%CF%81%CF%85%CF%86%CF%8C%CF%81%CE%BF%CF%82)" title="Τρίτωνας (δορυφόρος) – Greek" lang="el" hreflang="el" data-title="Τρίτωνας (δορυφόρος)" data-language-autonym="Ελληνικά" data-language-local-name="Greek" class="interlanguage-link-target">Ελληνικά</a></li><li class="interlanguage-link interwiki-eml mw-list-item"><a href="https://eml.wikipedia.org/wiki/Trit%C3%B2%E1%B9%85_(astrunum%C3%ACa)" title="Tritòṅ (astrunumìa) – Emiliano-Romagnolo" lang="egl" hreflang="egl" data-title="Tritòṅ (astrunumìa)" data-language-autonym="Emiliàn e rumagnòl" data-language-local-name="Emiliano-Romagnolo" class="interlanguage-link-target">Emiliàn e rumagnòl</a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Trit%C3%B3n_(sat%C3%A9lite)" title="Tritón (satélite) – Spanish" lang="es" hreflang="es" data-title="Tritón (satélite)" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target">Español</a></li><li class="interlanguage-link interwiki-eo mw-list-item"><a href="https://eo.wikipedia.org/wiki/Tritono_(luno)" title="Tritono (luno) – Esperanto" lang="eo" hreflang="eo" data-title="Tritono (luno)" data-language-autonym="Esperanto" data-language-local-name="Esperanto" class="interlanguage-link-target">Esperanto</a></li><li class="interlanguage-link interwiki-eu mw-list-item"><a href="https://eu.wikipedia.org/wiki/Triton_(satelitea)" title="Triton (satelitea) – Basque" lang="eu" hreflang="eu" data-title="Triton (satelitea)" data-language-autonym="Euskara" data-language-local-name="Basque" class="interlanguage-link-target">Euskara</a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%AA%D8%B1%DB%8C%D8%AA%D9%88%D9%86_(%D9%82%D9%85%D8%B1)" title="تریتون (قمر) – Persian" lang="fa" hreflang="fa" data-title="تریتون (قمر)" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target">فارسی</a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Triton_(lune)" title="Triton (lune) – French" lang="fr" hreflang="fr" data-title="Triton (lune)" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target">Français</a></li><li class="interlanguage-link interwiki-ga mw-list-item"><a href="https://ga.wikipedia.org/wiki/Tr%C3%ADot%C3%B3n" title="Tríotón – Irish" lang="ga" hreflang="ga" data-title="Tríotón" data-language-autonym="Gaeilge" data-language-local-name="Irish" class="interlanguage-link-target">Gaeilge</a></li><li class="interlanguage-link interwiki-gl mw-list-item"><a href="https://gl.wikipedia.org/wiki/Trit%C3%B3n_(l%C3%BAa)" title="Tritón (lúa) – Galician" lang="gl" hreflang="gl" data-title="Tritón (lúa)" data-language-autonym="Galego" data-language-local-name="Galician" class="interlanguage-link-target">Galego</a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/%ED%8A%B8%EB%A6%AC%ED%86%A4_(%EC%9C%84%EC%84%B1)" title="트리톤 (위성) – Korean" lang="ko" hreflang="ko" data-title="트리톤 (위성)" data-language-autonym="한국어" data-language-local-name="Korean" class="interlanguage-link-target">한국어</a></li><li class="interlanguage-link interwiki-hy mw-list-item"><a href="https://hy.wikipedia.org/wiki/%D5%8F%D6%80%D5%AB%D5%BF%D5%B8%D5%B6_(%D5%A1%D6%80%D5%A2%D5%A1%D5%B6%D5%B5%D5%A1%D5%AF)" title="Տրիտոն (արբանյակ) – Armenian" lang="hy" hreflang="hy" data-title="Տրիտոն (արբանյակ)" data-language-autonym="Հայերեն" data-language-local-name="Armenian" class="interlanguage-link-target">Հայերեն</a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%9F%E0%A5%8D%E0%A4%B0%E0%A4%BE%E0%A4%87%E0%A4%9F%E0%A4%A8_(%E0%A4%89%E0%A4%AA%E0%A4%97%E0%A5%8D%E0%A4%B0%E0%A4%B9)" title="ट्राइटन (उपग्रह) – Hindi" lang="hi" hreflang="hi" data-title="ट्राइटन (उपग्रह)" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target">हिन्दी</a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Triton_(mjesec)" title="Triton (mjesec) – Croatian" lang="hr" hreflang="hr" data-title="Triton (mjesec)" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target">Hrvatski</a></li><li class="interlanguage-link interwiki-io mw-list-item"><a href="https://io.wikipedia.org/wiki/Tritono_(satelito)" title="Tritono (satelito) – Ido" lang="io" hreflang="io" data-title="Tritono (satelito)" data-language-autonym="Ido" data-language-local-name="Ido" class="interlanguage-link-target">Ido</a></li><li class="interlanguage-link interwiki-id mw-list-item"><a href="https://id.wikipedia.org/wiki/Triton_(satelit)" title="Triton (satelit) – Indonesian" lang="id" hreflang="id" data-title="Triton (satelit)" data-language-autonym="Bahasa Indonesia" data-language-local-name="Indonesian" class="interlanguage-link-target">Bahasa Indonesia</a></li><li class="interlanguage-link interwiki-is mw-list-item"><a href="https://is.wikipedia.org/wiki/Tr%C3%ADton_(tungl)" title="Tríton (tungl) – Icelandic" lang="is" hreflang="is" data-title="Tríton (tungl)" data-language-autonym="Íslenska" data-language-local-name="Icelandic" class="interlanguage-link-target">Íslenska</a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Tritone_(astronomia)" title="Tritone (astronomia) – Italian" lang="it" hreflang="it" data-title="Tritone (astronomia)" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target">Italiano</a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/%D7%98%D7%A8%D7%99%D7%98%D7%95%D7%9F_(%D7%99%D7%A8%D7%97)" title="טריטון (ירח) – Hebrew" lang="he" hreflang="he" data-title="טריטון (ירח)" data-language-autonym="עברית" data-language-local-name="Hebrew" class="interlanguage-link-target">עברית</a></li><li class="interlanguage-link interwiki-kv mw-list-item"><a href="https://kv.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD" title="Тритон – Komi" lang="kv" hreflang="kv" data-title="Тритон" data-language-autonym="Коми" data-language-local-name="Komi" class="interlanguage-link-target">Коми</a></li><li class="interlanguage-link interwiki-ht mw-list-item"><a href="https://ht.wikipedia.org/wiki/Triton" title="Triton – Haitian Creole" lang="ht" hreflang="ht" data-title="Triton" data-language-autonym="Kreyòl ayisyen" data-language-local-name="Haitian Creole" class="interlanguage-link-target">Kreyòl ayisyen</a></li><li class="interlanguage-link interwiki-ku mw-list-item"><a href="https://ku.wikipedia.org/wiki/Tr%C3%AEton_(peyk)" title="Trîton (peyk) – Kurdish" lang="ku" hreflang="ku" data-title="Trîton (peyk)" data-language-autonym="Kurdî" data-language-local-name="Kurdish" class="interlanguage-link-target">Kurdî</a></li><li class="interlanguage-link interwiki-ky mw-list-item"><a href="https://ky.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD" title="Тритон – Kyrgyz" lang="ky" hreflang="ky" data-title="Тритон" data-language-autonym="Кыргызча" data-language-local-name="Kyrgyz" class="interlanguage-link-target">Кыргызча</a></li><li class="interlanguage-link interwiki-la mw-list-item"><a href="https://la.wikipedia.org/wiki/Triton_(satelles)" title="Triton (satelles) – Latin" lang="la" hreflang="la" data-title="Triton (satelles)" data-language-autonym="Latina" data-language-local-name="Latin" class="interlanguage-link-target">Latina</a></li><li class="interlanguage-link interwiki-lv mw-list-item"><a href="https://lv.wikipedia.org/wiki/Tritons_(pavadonis)" title="Tritons (pavadonis) – Latvian" lang="lv" hreflang="lv" data-title="Tritons (pavadonis)" data-language-autonym="Latviešu" data-language-local-name="Latvian" class="interlanguage-link-target">Latviešu</a></li><li class="interlanguage-link interwiki-lb mw-list-item"><a href="https://lb.wikipedia.org/wiki/Triton_(Mound)" title="Triton (Mound) – Luxembourgish" lang="lb" hreflang="lb" data-title="Triton (Mound)" data-language-autonym="Lëtzebuergesch" data-language-local-name="Luxembourgish" class="interlanguage-link-target">Lëtzebuergesch</a></li><li class="interlanguage-link interwiki-lt mw-list-item"><a href="https://lt.wikipedia.org/wiki/Tritonas_(palydovas)" title="Tritonas (palydovas) – Lithuanian" lang="lt" hreflang="lt" data-title="Tritonas (palydovas)" data-language-autonym="Lietuvių" data-language-local-name="Lithuanian" class="interlanguage-link-target">Lietuvių</a></li><li class="interlanguage-link interwiki-lmo mw-list-item"><a href="https://lmo.wikipedia.org/wiki/Tritone_(corp_celest)" title="Tritone (corp celest) – Lombard" lang="lmo" hreflang="lmo" data-title="Tritone (corp celest)" data-language-autonym="Lombard" data-language-local-name="Lombard" class="interlanguage-link-target">Lombard</a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Triton_(hold)" title="Triton (hold) – Hungarian" lang="hu" hreflang="hu" data-title="Triton (hold)" data-language-autonym="Magyar" data-language-local-name="Hungarian" class="interlanguage-link-target">Magyar</a></li><li class="interlanguage-link interwiki-mk mw-list-item"><a href="https://mk.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD_(%D0%BC%D0%B5%D1%81%D0%B5%D1%87%D0%B8%D0%BD%D0%B0)" title="Тритон (месечина) – Macedonian" lang="mk" hreflang="mk" data-title="Тритон (месечина)" data-language-autonym="Македонски" data-language-local-name="Macedonian" class="interlanguage-link-target">Македонски</a></li><li class="interlanguage-link interwiki-ml mw-list-item"><a href="https://ml.wikipedia.org/wiki/%E0%B4%9F%E0%B5%8D%E0%B4%B0%E0%B4%BF%E0%B4%B1%E0%B5%8D%E0%B4%B1%E0%B5%8B%E0%B5%BA" title="ട്രിറ്റോൺ – Malayalam" lang="ml" hreflang="ml" data-title="ട്രിറ്റോൺ" data-language-autonym="മലയാളം" data-language-local-name="Malayalam" class="interlanguage-link-target">മലയാളം</a></li><li class="interlanguage-link interwiki-mr mw-list-item"><a href="https://mr.wikipedia.org/wiki/%E0%A4%9F%E0%A5%8D%E0%A4%B0%E0%A4%BE%E0%A4%AF%E0%A4%9F%E0%A4%A8_(%E0%A4%89%E0%A4%AA%E0%A4%97%E0%A5%8D%E0%A4%B0%E0%A4%B9)" title="ट्रायटन (उपग्रह) – Marathi" lang="mr" hreflang="mr" data-title="ट्रायटन (उपग्रह)" data-language-autonym="मराठी" data-language-local-name="Marathi" class="interlanguage-link-target">मराठी</a></li><li class="interlanguage-link interwiki-arz mw-list-item"><a href="https://arz.wikipedia.org/wiki/%D8%AA%D8%B1%D8%A7%D9%8A%D8%AA%D9%88%D9%86_(%D9%82%D9%85%D8%B1)" title="ترايتون (قمر) – Egyptian Arabic" lang="arz" hreflang="arz" data-title="ترايتون (قمر)" data-language-autonym="مصرى" data-language-local-name="Egyptian Arabic" class="interlanguage-link-target">مصرى</a></li><li class="interlanguage-link interwiki-ms mw-list-item"><a href="https://ms.wikipedia.org/wiki/Triton_(bulan)" title="Triton (bulan) – Malay" lang="ms" hreflang="ms" data-title="Triton (bulan)" data-language-autonym="Bahasa Melayu" data-language-local-name="Malay" class="interlanguage-link-target">Bahasa Melayu</a></li><li class="interlanguage-link interwiki-cdo mw-list-item"><a href="https://cdo.wikipedia.org/wiki/Triton_(%C3%B4i-s%C4%ADng)" title="Triton (ôi-sĭng) – Mindong" lang="cdo" hreflang="cdo" data-title="Triton (ôi-sĭng)" data-language-autonym="閩東語 / Mìng-dĕ̤ng-ngṳ̄" data-language-local-name="Mindong" class="interlanguage-link-target">閩東語 / Mìng-dĕ̤ng-ngṳ̄</a></li><li class="interlanguage-link interwiki-mwl mw-list-item"><a href="https://mwl.wikipedia.org/wiki/Triton_(sat%C3%A9lite)" title="Triton (satélite) – Mirandese" lang="mwl" hreflang="mwl" data-title="Triton (satélite)" data-language-autonym="Mirandés" data-language-local-name="Mirandese" class="interlanguage-link-target">Mirandés</a></li><li class="interlanguage-link interwiki-my mw-list-item"><a href="https://my.wikipedia.org/wiki/%E1%80%91%E1%80%9B%E1%80%AE%E1%80%90%E1%80%BD%E1%80%94%E1%80%BA_(%E1%80%82%E1%80%BC%E1%80%AD%E1%80%AF%E1%80%9F%E1%80%BA%E1%80%9B%E1%80%B6%E1%80%9C)" title="ထရီတွန် (ဂြိုဟ်ရံလ) – Burmese" lang="my" hreflang="my" data-title="ထရီတွန် (ဂြိုဟ်ရံလ)" data-language-autonym="မြန်မာဘာသာ" data-language-local-name="Burmese" class="interlanguage-link-target">မြန်မာဘာသာ</a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Triton_(maan)" title="Triton (maan) – Dutch" lang="nl" hreflang="nl" data-title="Triton (maan)" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target">Nederlands</a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%83%88%E3%83%AA%E3%83%88%E3%83%B3_(%E8%A1%9B%E6%98%9F)" title="トリトン (衛星) – Japanese" lang="ja" hreflang="ja" data-title="トリトン (衛星)" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target">日本語</a></li><li class="interlanguage-link interwiki-no mw-list-item"><a href="https://no.wikipedia.org/wiki/Triton_(m%C3%A5ne)" title="Triton (måne) – Norwegian Bokmål" lang="nb" hreflang="nb" data-title="Triton (måne)" data-language-autonym="Norsk bokmål" data-language-local-name="Norwegian Bokmål" class="interlanguage-link-target">Norsk bokmål</a></li><li class="interlanguage-link interwiki-nn mw-list-item"><a href="https://nn.wikipedia.org/wiki/Neptunm%C3%A5nen_Triton" title="Neptunmånen Triton – Norwegian Nynorsk" lang="nn" hreflang="nn" data-title="Neptunmånen Triton" data-language-autonym="Norsk nynorsk" data-language-local-name="Norwegian Nynorsk" class="interlanguage-link-target">Norsk nynorsk</a></li><li class="interlanguage-link interwiki-oc mw-list-item"><a href="https://oc.wikipedia.org/wiki/Triton_(luna)" title="Triton (luna) – Occitan" lang="oc" hreflang="oc" data-title="Triton (luna)" data-language-autonym="Occitan" data-language-local-name="Occitan" class="interlanguage-link-target">Occitan</a></li><li class="interlanguage-link interwiki-uz mw-list-item"><a href="https://uz.wikipedia.org/wiki/Triton" title="Triton – Uzbek" lang="uz" hreflang="uz" data-title="Triton" data-language-autonym="Oʻzbekcha / ўзбекча" data-language-local-name="Uzbek" class="interlanguage-link-target">Oʻzbekcha / ўзбекча</a></li><li class="interlanguage-link interwiki-ps mw-list-item"><a href="https://ps.wikipedia.org/wiki/%D9%BC%D8%B1%DB%8C%D9%BC%D9%88%D9%86_(%D8%B3%D9%BE%D9%88%DA%96%D9%85%DB%8D)" title="ټریټون (سپوږمۍ) – Pashto" lang="ps" hreflang="ps" data-title="ټریټون (سپوږمۍ)" data-language-autonym="پښتو" data-language-local-name="Pashto" class="interlanguage-link-target">پښتو</a></li><li class="interlanguage-link interwiki-nds mw-list-item"><a href="https://nds.wikipedia.org/wiki/Triton_(Maand)" title="Triton (Maand) – Low German" lang="nds" hreflang="nds" data-title="Triton (Maand)" data-language-autonym="Plattdüütsch" data-language-local-name="Low German" class="interlanguage-link-target">Plattdüütsch</a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Tryton_(ksi%C4%99%C5%BCyc)" title="Tryton (księżyc) – Polish" lang="pl" hreflang="pl" data-title="Tryton (księżyc)" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target">Polski</a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Trit%C3%A3o_(sat%C3%A9lite)" title="Tritão (satélite) – Portuguese" lang="pt" hreflang="pt" data-title="Tritão (satélite)" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target">Português</a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Triton_(satelit)" title="Triton (satelit) – Romanian" lang="ro" hreflang="ro" data-title="Triton (satelit)" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target">Română</a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD_(%D1%81%D0%BF%D1%83%D1%82%D0%BD%D0%B8%D0%BA)" title="Тритон (спутник) – Russian" lang="ru" hreflang="ru" data-title="Тритон (спутник)" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target">Русский</a></li><li class="interlanguage-link interwiki-sq mw-list-item"><a href="https://sq.wikipedia.org/wiki/Tritoni" title="Tritoni – Albanian" lang="sq" hreflang="sq" data-title="Tritoni" data-language-autonym="Shqip" data-language-local-name="Albanian" class="interlanguage-link-target">Shqip</a></li><li class="interlanguage-link interwiki-scn mw-list-item"><a href="https://scn.wikipedia.org/wiki/Trituni_(astronumia)" title="Trituni (astronumia) – Sicilian" lang="scn" hreflang="scn" data-title="Trituni (astronumia)" data-language-autonym="Sicilianu" data-language-local-name="Sicilian" class="interlanguage-link-target">Sicilianu</a></li><li class="interlanguage-link interwiki-si badge-Q17437796 badge-featuredarticle mw-list-item" title="featured article badge"><a href="https://si.wikipedia.org/wiki/%E0%B6%A7%E0%B7%8A%E2%80%8D%E0%B6%BB%E0%B6%BA%E0%B7%92%E0%B6%A7%E0%B6%B1%E0%B7%8A_(%E0%B6%B1%E0%B7%99%E0%B6%B4%E0%B7%8A%E0%B6%A0%E0%B7%96%E0%B6%B1%E0%B7%8A%E0%B6%9C%E0%B7%9A_%E0%B6%A0%E0%B6%B1%E0%B7%8A%E0%B6%AF%E0%B7%8A%E2%80%8D%E0%B6%BB%E0%B6%BA%E0%B7%8F)" title="ට්‍රයිටන් (නෙප්චූන්ගේ චන්ද්‍රයා) – Sinhala" lang="si" hreflang="si" data-title="ට්‍රයිටන් (නෙප්චූන්ගේ චන්ද්‍රයා)" data-language-autonym="සිංහල" data-language-local-name="Sinhala" class="interlanguage-link-target">සිංහල</a></li><li class="interlanguage-link interwiki-simple mw-list-item"><a href="https://simple.wikipedia.org/wiki/Triton_(moon)" title="Triton (moon) – Simple English" lang="en-simple" hreflang="en-simple" data-title="Triton (moon)" data-language-autonym="Simple English" data-language-local-name="Simple English" class="interlanguage-link-target">Simple English</a></li><li class="interlanguage-link interwiki-sk badge-Q17437798 badge-goodarticle mw-list-item" title="good article badge"><a href="https://sk.wikipedia.org/wiki/Trit%C3%B3n_(mesiac)" title="Tritón (mesiac) – Slovak" lang="sk" hreflang="sk" data-title="Tritón (mesiac)" data-language-autonym="Slovenčina" data-language-local-name="Slovak" class="interlanguage-link-target">Slovenčina</a></li><li class="interlanguage-link interwiki-sl mw-list-item"><a href="https://sl.wikipedia.org/wiki/Triton_(luna)" title="Triton (luna) – Slovenian" lang="sl" hreflang="sl" data-title="Triton (luna)" data-language-autonym="Slovenščina" data-language-local-name="Slovenian" class="interlanguage-link-target">Slovenščina</a></li><li class="interlanguage-link interwiki-ckb mw-list-item"><a href="https://ckb.wikipedia.org/wiki/%D8%AA%D8%B1%DB%8C%D8%AA%DB%86%D9%86_(%D9%85%D8%A7%D9%86%DA%AF)" title="تریتۆن (مانگ) – Central Kurdish" lang="ckb" hreflang="ckb" data-title="تریتۆن (مانگ)" data-language-autonym="کوردی" data-language-local-name="Central Kurdish" class="interlanguage-link-target">کوردی</a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD_(%D1%81%D0%B0%D1%82%D0%B5%D0%BB%D0%B8%D1%82)" title="Тритон (сателит) – Serbian" lang="sr" hreflang="sr" data-title="Тритон (сателит)" data-language-autonym="Српски / srpski" data-language-local-name="Serbian" class="interlanguage-link-target">Српски / srpski</a></li><li class="interlanguage-link interwiki-sh mw-list-item"><a href="https://sh.wikipedia.org/wiki/Triton_(mjesec)" title="Triton (mjesec) – Serbo-Croatian" lang="sh" hreflang="sh" data-title="Triton (mjesec)" data-language-autonym="Srpskohrvatski / српскохрватски" data-language-local-name="Serbo-Croatian" class="interlanguage-link-target">Srpskohrvatski / српскохрватски</a></li><li class="interlanguage-link interwiki-fi mw-list-item"><a href="https://fi.wikipedia.org/wiki/Triton_(kuu)" title="Triton (kuu) – Finnish" lang="fi" hreflang="fi" data-title="Triton (kuu)" data-language-autonym="Suomi" data-language-local-name="Finnish" class="interlanguage-link-target">Suomi</a></li><li class="interlanguage-link interwiki-sv badge-Q17559452 badge-recommendedarticle mw-list-item" title="recommended article"><a href="https://sv.wikipedia.org/wiki/Triton_(m%C3%A5ne)" title="Triton (måne) – Swedish" lang="sv" hreflang="sv" data-title="Triton (måne)" data-language-autonym="Svenska" data-language-local-name="Swedish" class="interlanguage-link-target">Svenska</a></li><li class="interlanguage-link interwiki-ta mw-list-item"><a href="https://ta.wikipedia.org/wiki/%E0%AE%9F%E0%AE%BF%E0%AE%B0%E0%AF%88%E0%AE%9F%E0%AF%8D%E0%AE%9F%E0%AE%A9%E0%AF%8D_(%E0%AE%A4%E0%AF%81%E0%AE%A3%E0%AF%88%E0%AE%95%E0%AF%8D%E0%AE%95%E0%AF%8B%E0%AE%B3%E0%AF%8D)" title="டிரைட்டன் (துணைக்கோள்) – Tamil" lang="ta" hreflang="ta" data-title="டிரைட்டன் (துணைக்கோள்)" data-language-autonym="தமிழ்" data-language-local-name="Tamil" class="interlanguage-link-target">தமிழ்</a></li><li class="interlanguage-link interwiki-th mw-list-item"><a href="https://th.wikipedia.org/wiki/%E0%B9%84%E0%B8%97%E0%B8%A3%E0%B8%97%E0%B8%B1%E0%B8%99_(%E0%B8%94%E0%B8%B2%E0%B8%A7%E0%B8%9A%E0%B8%A3%E0%B8%B4%E0%B8%A7%E0%B8%B2%E0%B8%A3)" title="ไทรทัน (ดาวบริวาร) – Thai" lang="th" hreflang="th" data-title="ไทรทัน (ดาวบริวาร)" data-language-autonym="ไทย" data-language-local-name="Thai" class="interlanguage-link-target">ไทย</a></li><li class="interlanguage-link interwiki-tr mw-list-item"><a href="https://tr.wikipedia.org/wiki/Triton_(uydu)" title="Triton (uydu) – Turkish" lang="tr" hreflang="tr" data-title="Triton (uydu)" data-language-autonym="Türkçe" data-language-local-name="Turkish" class="interlanguage-link-target">Türkçe</a></li><li class="interlanguage-link interwiki-tk mw-list-item"><a href="https://tk.wikipedia.org/wiki/Triton" title="Triton – Turkmen" lang="tk" hreflang="tk" data-title="Triton" data-language-autonym="Türkmençe" data-language-local-name="Turkmen" class="interlanguage-link-target">Türkmençe</a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%A2%D1%80%D0%B8%D1%82%D0%BE%D0%BD_(%D1%81%D1%83%D0%BF%D1%83%D1%82%D0%BD%D0%B8%D0%BA)" title="Тритон (супутник) – Ukrainian" lang="uk" hreflang="uk" data-title="Тритон (супутник)" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target">Українська</a></li><li class="interlanguage-link interwiki-ur mw-list-item"><a href="https://ur.wikipedia.org/wiki/%D9%B9%D8%B1%D8%A7%D8%A6%D9%B9%D9%86_(%DA%86%D8%A7%D9%86%D8%AF)" title="ٹرائٹن (چاند) – Urdu" lang="ur" hreflang="ur" data-title="ٹرائٹن (چاند)" data-language-autonym="اردو" data-language-local-name="Urdu" class="interlanguage-link-target">اردو</a></li><li class="interlanguage-link interwiki-vi mw-list-item"><a href="https://vi.wikipedia.org/wiki/Triton_(v%E1%BB%87_tinh)" title="Triton (vệ tinh) – Vietnamese" lang="vi" hreflang="vi" data-title="Triton (vệ tinh)" data-language-autonym="Tiếng Việt" data-language-local-name="Vietnamese" class="interlanguage-link-target">Tiếng Việt</a></li><li class="interlanguage-link interwiki-zh-classical mw-list-item"><a href="https://zh-classical.wikipedia.org/wiki/%E6%B5%B7%E8%A1%9B%E4%B8%80" title="海衛一 – Literary Chinese" lang="lzh" hreflang="lzh" data-title="海衛一" data-language-autonym="文言" data-language-local-name="Literary Chinese" class="interlanguage-link-target">文言</a></li><li class="interlanguage-link interwiki-war mw-list-item"><a href="https://war.wikipedia.org/wiki/Triton_(bulan)" title="Triton (bulan) – Waray" lang="war" hreflang="war" data-title="Triton (bulan)" data-language-autonym="Winaray" data-language-local-name="Waray" class="interlanguage-link-target">Winaray</a></li><li class="interlanguage-link interwiki-wuu mw-list-item"><a href="https://wuu.wikipedia.org/wiki/%E6%B5%B7%E5%8D%AB%E4%B8%80" title="海卫一 – Wu" lang="wuu" hreflang="wuu" data-title="海卫一" data-language-autonym="吴语" data-language-local-name="Wu" class="interlanguage-link-target">吴语</a></li><li class="interlanguage-link interwiki-zh-yue mw-list-item"><a href="https://zh-yue.wikipedia.org/wiki/%E6%B5%B7%E8%A1%9E%E4%B8%80" title="海衞一 – Cantonese" lang="yue" hreflang="yue" data-title="海衞一" data-language-autonym="粵語" data-language-local-name="Cantonese" class="interlanguage-link-target">粵語</a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E6%B5%B7%E5%8D%AB%E4%B8%80" title="海卫一 – Chinese" lang="zh" hreflang="zh" data-title="海卫一" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target">中文</a></li></ul> </section> </div> <div class="minerva-footer-logo"><img src="/static/images/mobile/copyright/wikipedia-wordmark-en.svg" alt="Wikipedia" width="120" height="18" style="width: 7.5em; height: 1.125em;"/> </div> <ul id="footer-info" class="footer-info hlist hlist-separated"> <li id="footer-info-lastmod"> This page was last edited on 22 November 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