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<title>Extinct comet</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Extinct comet</span></span>

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<p>An <b>extinct comet</b> is a <a href="Comet" title="Comet">comet</a> that has expelled most of its <a href="Volatile_(astrogeology)" title="Volatile (astrogeology)">volatile ice</a> and has little left to form a <a href="Comet_tail" title="Comet tail">tail</a> and <a href="Coma_(cometary)" class="mw-redirect" title="Coma (cometary)">coma</a>. In a <b>dormant comet</b>, rather than being depleted, any remaining volatile components have been sealed beneath an inactive surface layer.

</p><p>Due to the near lack of a coma and tail, an extinct or dormant comet may resemble an <a href="Asteroid" title="Asteroid">asteroid</a> rather than a comet and blur the distinction between these two classes of <a href="Small_Solar_System_bodies" class="mw-redirect" title="Small Solar System bodies">small Solar System bodies</a>. When volatile materials such as nitrogen, water, carbon dioxide, ammonia, hydrogen and methane in the <a href="Comet_nucleus" title="Comet nucleus">comet nucleus</a> have evaporated away, all that remains is an inert rock or <a href="Rubble_pile" title="Rubble pile">rubble pile</a>. A comet may go through a transition phase as it comes close to extinction.

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<div class="mw-heading mw-heading2"><h2 id="Nature_of_extinct_comets">Nature of extinct comets</h2></div>

<p>Extinct comets are those that have expelled most of their volatile ice and have little left to form a tail or coma. Over time, most of the volatile material contained in a comet nucleus evaporates away, and the comet becomes a small, dark, inert lump of rock or rubble<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> that can resemble an asteroid.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

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<p>Other related types of comet include <i>transition comets</i>, that are close to becoming extinct, such as were looked for in the <a href="Hubble_search_for_transition_comets" title="Hubble search for transition comets">Hubble search for transition comets</a>.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Comets such as <a href="C/2001_OG108_(LONEOS)" title="C/2001 OG108 (LONEOS)">C/2001 OG108 (LONEOS)</a> may represent the transition between extinct comets and typical <a href="Halley-type_comet" class="mw-redirect" title="Halley-type comet">Halley-type comets</a> (periods of 20–200 years) or <a href="Long_period_comet" class="mw-redirect" title="Long period comet">long period comets</a> (periods longer than 200 years).<sup id="cite_ref-Abell2003_5-0" class="reference"><a href="#cite_note-Abell2003-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> Minor planets of the group of <a href="Damocloid" title="Damocloid">damocloids</a> have been studied as possible extinct cometary candidates due to the similarity of their orbital parameters with those of Halley-type comets.<sup id="cite_ref-Abell2003_5-1" class="reference"><a href="#cite_note-Abell2003-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading3"><h3 id="Dormant_comets">Dormant comets</h3></div>

<p>Dormant comets are those within which volatiles may be sealed, but which have inactive surfaces. For example, <a href="14827_Hypnos" title="14827 Hypnos">14827 Hypnos</a> may be the <a href="Comet_nucleus" title="Comet nucleus">nucleus</a> of an extinct comet that is covered by a crust several centimeters thick that prevents any remaining <a href="Volatility_(chemistry)" title="Volatility (chemistry)">volatiles</a> from <a href="Outgassing" title="Outgassing">outgassing</a>.<sup id="cite_ref-dormant_6-0" class="reference"><a href="#cite_note-dormant-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup>

</p><p>The term <i>dormant comet</i> is also used to describe comets that may become active but are not actively outgassing. For example, <a href="60558_Echeclus" title="60558 Echeclus">60558 Echeclus</a> has previously displayed a cometary coma and thus also has been given the cometary designation 174P/Echeclus. After passing perihelion in early 2008, centaur <a href="52872_Okyrhoe" title="52872 Okyrhoe">52872 Okyrhoe</a> significantly brightened.<sup id="cite_ref-cometary_7-0" class="reference"><a href="#cite_note-cometary-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Distinction_between_comets_and_asteroids">Distinction between comets and asteroids</h2></div>

<p>When discovered, asteroids were seen as a class of objects distinct from comets, and there was no unified term for the two until "<a href="Small_Solar_System_body" title="Small Solar System body">small Solar System body</a>" was coined by the <a href="International_Astronomical_Union" title="International Astronomical Union">IAU</a> in 2006. The main difference between an asteroid and a comet is that a comet shows a coma due to <a href="Outgassing" title="Outgassing">sublimation</a> of near-surface ices by solar radiation. A few objects have ended up being dual-listed because they were first classified as minor planets but later showed evidence of cometary activity. Conversely, some (perhaps all) comets are eventually depleted of their surface <a href="Volatile_(astrogeology)" title="Volatile (astrogeology)">volatile ices</a> and develop the appearance of asteroids. A further distinction is that comets typically have more eccentric orbits than most asteroids; most "asteroids" with notably eccentric orbits are probably dormant or extinct comets. Also, they are theorized to be common objects amongst the celestial bodies orbiting close to the Sun.<sup id="cite_ref-esa_8-0" class="reference"><a href="#cite_note-esa-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup>

</p><p>Roughly six percent of the <a href="Near-Earth_asteroid" class="mw-redirect" title="Near-Earth asteroid">near-Earth asteroids</a> are thought to be extinct nuclei of comets which no longer experience outgassing.<sup id="cite_ref-dormant_6-1" class="reference"><a href="#cite_note-dormant-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-MorbidelliAstIII_9-0" class="reference"><a href="#cite_note-MorbidelliAstIII-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Lupishko_10-0" class="reference"><a href="#cite_note-Lupishko-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Extinct_comets">Extinct comets</h2></div>

<p>Suspected or hypothesized extinct comets include:

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<li><a href="14827_Hypnos" title="14827 Hypnos">14827 Hypnos</a><sup id="cite_ref-dormant_6-2" class="reference"><a href="#cite_note-dormant-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></li>

<li><a href="2101_Adonis" title="2101 Adonis">2101 Adonis</a></li>

<li><a href="3200_Phaethon" title="3200 Phaethon">3200 Phaethon</a><sup id="cite_ref-Lupishko_10-1" class="reference"><a href="#cite_note-Lupishko-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Jewitt2010_11-0" class="reference"><a href="#cite_note-Jewitt2010-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></li>

<li><a href="3552_Don_Quixote" title="3552 Don Quixote">3552 Don Quixote</a><sup id="cite_ref-Lupishko_10-2" class="reference"><a href="#cite_note-Lupishko-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup></li>

<li><a href="1996_PW" title="1996 PW">1996 PW</a> possibly an extinct long-period comet<sup id="cite_ref-12" class="reference"><a href="#cite_note-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></li></ul>

<ul><li><a href="Centaur_(minor_planet)" class="mw-redirect" title="Centaur (minor planet)">Centaur (minor planet)</a></li>

<li><a href="Damocloid_asteroid" class="mw-redirect" title="Damocloid asteroid">Damocloid asteroid</a></li>

<li><a href="List_of_minor_planets_and_comets_visited_by_spacecraft" title="List of minor planets and comets visited by spacecraft">List of minor planets and comets visited by spacecraft</a></li>

<li><a href="Lost_comet" title="Lost comet">Lost comet</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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<li id="cite_note-12"><span class="mw-cite-backlink"><b><a href="#cite_ref-12">^</a></b></span> <span class="reference-text"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20080724165647/http://www.jpl.nasa.gov/releases/96/astcome.html">"New Object Moves Like a Comet But Looks Like an Asteroid"</a>. <i>www.jpl.nasa.gov</i>. 22 August 1996. Archived from <a rel="nofollow" class="external text" href="https://www.jpl.nasa.gov/releases/96/astcome.html">the original</a> on 24 July 2008.</cite></span>

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<div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2></div>

<ul><li><a rel="nofollow" class="external text" href="https://www.scribd.com/doc/5512498/Low-Albedos-Among-Extinct-Comet-Candidates">"Low Albedos Among Extinct Comet Candidates", 2001</a></li>

<li><a rel="nofollow" class="external text" href="https://www.newscientist.com/article/dn18616-dark-dangerous-asteroids-found-lurking-near-earth.html">Dark, dangerous asteroids found lurking near Earth</a> (NewScientist 5 March 2010)</li></ul>

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</style><div id="Comets119" style="font-size:114%;margin:0 4em"><a href="Comet" title="Comet">Comets</a></div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">Features</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Comet_nucleus" title="Comet nucleus">Nucleus</a></li>

<li><a href="Comet_tail" title="Comet tail">Tails</a></li>

<li><a href="Antitail" class="mw-redirect" title="Antitail">Antitail</a></li>

<li><a href="Comet_dust" title="Comet dust">Comet dust</a></li>

<li><a href="Meteor_shower" title="Meteor shower">Meteor shower</a></li></ul>

</div></td><td class="noviewer navbox-image" rowspan="6" style="width:1px;padding:0 0 0 2px"><div><span typeof="mw:File"></span><br><span typeof="mw:File"></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;"><a href="Comet#Orbital_characteristics" title="Comet">Types</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="List_of_periodic_comets" title="List of periodic comets">Periodic</a>

<ul><li><a href="List_of_numbered_comets" title="List of numbered comets">Numbered</a></li>

<li><a href="List_of_long-period_comets" title="List of long-period comets">Long period</a></li>

<li><a href="List_of_Halley-type_comets" title="List of Halley-type comets">Halley-type</a></li>

<li><a href="Jupiter-family_comet" class="mw-redirect" title="Jupiter-family comet">Jupiter-family</a></li>

<li>Encke-type</li>

<li><a href="List_of_non-periodic_comets" class="mw-redirect" title="List of non-periodic comets">Non-periodic</a>

<ul><li><a href="List_of_near-parabolic_comets" title="List of near-parabolic comets">Near-parabolic</a></li>

<li><a href="List_of_hyperbolic_comets" class="mw-redirect" title="List of hyperbolic comets">Hyperbolic</a></li>

<li><a href="List_of_comets_with_no_meaningful_orbit" title="List of comets with no meaningful orbit">Unknown-orbit</a></li></ul></li>

<li><a href="Great_comet" title="Great comet">Great Comet</a></li>

<li><a href="Sungrazing_comet" title="Sungrazing comet">Sungrazing</a> (<a href="Kreutz_sungrazer" title="Kreutz sungrazer">Kreutz</a>)</li>

<li><a href="Exocomet" title="Exocomet">Exocomet</a></li>

<li><a href="Interstellar_object" title="Interstellar object">Interstellar</a></li>

<li><a href="Dark_comet" title="Dark comet">Dark comet</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">Related</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Naming_of_comets" title="Naming of comets">Naming of comets</a></li>

<li><a href="Observational_history_of_comets" title="Observational history of comets">Observational history of comets</a></li>

<li><a href="Centaur_(minor_planet)" class="mw-redirect" title="Centaur (minor planet)">Centaur</a></li>

<li>Comet discoverers

<ul><li><a href="List_of_comets_discovered_by_the_LINEAR_project" title="List of comets discovered by the LINEAR project">LINEAR</a></li></ul></li>

<li><a href="Extraterrestrial_atmosphere" title="Extraterrestrial atmosphere">Extraterrestrial atmosphere</a></li>

<li><a href="Oort_cloud" title="Oort cloud">Oort cloud</a></li>

<li><a href="Small_Solar_System_body" title="Small Solar System body">Small Solar System body</a></li>

<li><a href="Asteroid" title="Asteroid">Asteroid</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">Exploration</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="List_of_missions_to_comets" title="List of missions to comets">List of missions to comets</a></li>

<li><a href="List_of_comets_visited_by_spacecraft" class="mw-redirect" title="List of comets visited by spacecraft">List of comets visited by spacecraft</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">Latest</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<li><a href="C/2024_S1_(ATLAS)" title="C/2024 S1 (ATLAS)">C/2024 S1 (ATLAS)</a></li>

<li><a href="C/2024_G3_(ATLAS)" title="C/2024 G3 (ATLAS)">C/2024 G3 (ATLAS)</a></li>

<li><a href="C/2023_P1_(Nishimura)" title="C/2023 P1 (Nishimura)">C/2023 P1 (Nishimura)</a></li>

<li><a href="C/2023_H2_(Lemmon)" title="C/2023 H2 (Lemmon)">C/2023 H2 (Lemmon)</a></li>

<li><a href="C/2023_E1_(ATLAS)" title="C/2023 E1 (ATLAS)">C/2023 E1 (ATLAS)</a></li>

<li><a href="C/2023_A3_(Tsuchinshan%E2%80%93ATLAS)" title="C/2023 A3 (Tsuchinshan–ATLAS)">C/2023 A3 (Tsuchinshan–ATLAS)</a></li>

<li><a href="C/2021_O3_(PanSTARRS)" title="C/2021 O3 (PanSTARRS)">C/2021 O3 (PanSTARRS)</a></li>

<li><a href="C/2021_J1_(Maury-Attard)" class="mw-redirect" title="C/2021 J1 (Maury-Attard)">C/2021 J1 (Maury-Attard)</a></li>

<li><a href="C/2021_A1_(Leonard)" title="C/2021 A1 (Leonard)">C/2021 A1 (Leonard)</a></li>

<li><a href="C/2020_F5_(MASTER)" title="C/2020 F5 (MASTER)">C/2020 F5 (MASTER)</a></li>

<li><a href="Comet_NEOWISE" title="Comet NEOWISE">C/2020 F3 (NEOWISE)</a></li>

<li><a href="C/2019_Y4_(ATLAS)" title="C/2019 Y4 (ATLAS)">C/2019 Y4 (ATLAS)</a></li>

<li><a href="C/2019_Y1_(ATLAS)" title="C/2019 Y1 (ATLAS)">C/2019 Y1 (ATLAS)</a></li>

<li><a href="C/2019_U6_(Lemmon)" title="C/2019 U6 (Lemmon)">C/2019 U6 (Lemmon)</a></li>

<li><a href="2I/Borisov" title="2I/Borisov">2I/Borisov</a></li>

<li><a href="P/2019_LD2_(ATLAS)" title="P/2019 LD2 (ATLAS)">P/2019 LD2 (ATLAS)</a></li>

<li><a href="C/2018_Y1_(Iwamoto)" title="C/2018 Y1 (Iwamoto)">C/2018 Y1 (Iwamoto)</a></li>

<li><a href="C/2018_C2_(Lemmon)" title="C/2018 C2 (Lemmon)">C/2018 C2 (Lemmon)</a></li>

<li><a href="C/2017_K2_(PanSTARRS)" title="C/2017 K2 (PanSTARRS)">C/2017 K2 (PanSTARRS)</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">Culture and<br>speculation</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Antimatter_comet" title="Antimatter comet">Antimatter comet</a></li>

<li><a href="Comets_in_fiction" title="Comets in fiction">Comets in fiction</a></li>

<li><a href="Comet_vintages" title="Comet vintages">Comet vintages</a></li></ul>

</div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks mw-collapsible mw-collapsed navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="text-align: center;"><div id="Lists_of_comets_(more)119" style="font-size:114%;margin:0 4em"><a href="Lists_of_comets" title="Lists of comets">Lists of comets</a> (more)</div></th></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;"><a href="List_of_numbered_comets" title="List of numbered comets">Periodic<br>comets</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">Until 1985<br>(all)</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="Halley's_Comet" title="Halley's Comet">1P/Halley</a></li>

<li><a href="Comet_Encke" title="Comet Encke">2P/Encke</a></li>

<li><a href="Biela's_Comet" title="Biela's Comet">3D/Biela</a></li>

<li><a href="5D/Brorsen" title="5D/Brorsen">5D/Brorsen</a></li>

<li><a href="6P/d'Arrest" title="6P/d'Arrest">6P/d'Arrest</a></li>

<li><a href="7P/Pons%E2%80%93Winnecke" title="7P/Pons–Winnecke">7P/Pons–Winnecke</a></li>

<li><a href="8P/Tuttle" title="8P/Tuttle">8P/Tuttle</a></li>

<li><a href="Tempel_1" title="Tempel 1">9P/Tempel</a></li>

<li><a href="10P/Tempel" title="10P/Tempel">10P/Tempel</a></li>

<li><a href="11P/Tempel%E2%80%93Swift%E2%80%93LINEAR" title="11P/Tempel–Swift–LINEAR">11P/Tempel–Swift–LINEAR</a></li>

<li><a href="12P/Pons%E2%80%93Brooks" title="12P/Pons–Brooks">12P/Pons–Brooks</a></li>

<li><a href="13P/Olbers" title="13P/Olbers">13P/Olbers</a></li>

<li><a href="15P/Finlay" title="15P/Finlay">15P/Finlay</a></li>

<li><a href="16P/Brooks" title="16P/Brooks">16P/Brooks</a></li>

<li><a href="Comet_Holmes" title="Comet Holmes">17P/Holmes</a></li>

<li><a href="18D/Perrine%E2%80%93Mrkos" title="18D/Perrine–Mrkos">18D/Perrine–Mrkos</a></li>

<li><a href="19P/Borrelly" title="19P/Borrelly">19P/Borrelly</a></li>

<li><a href="20D/Westphal" title="20D/Westphal">20D/Westphal</a></li>

<li><a href="21P/Giacobini%E2%80%93Zinner" title="21P/Giacobini–Zinner">21P/Giacobini–Zinner</a></li>

<li><a href="22P/Kopff" title="22P/Kopff">22P/Kopff</a></li>

<li><a href="23P/Brorsen%E2%80%93Metcalf" title="23P/Brorsen–Metcalf">23P/Brorsen–Metcalf</a></li>

<li><a href="24P/Schaumasse" title="24P/Schaumasse">24P/Schaumasse</a></li>

<li><a href="25D/Neujmin" title="25D/Neujmin">25D/Neujmin</a></li>

<li><a href="26P/Grigg%E2%80%93Skjellerup" title="26P/Grigg–Skjellerup">26P/Grigg–Skjellerup</a></li>

<li><a href="27P/Crommelin" title="27P/Crommelin">27P/Crommelin</a></li>

<li><a href="28P/Neujmin" title="28P/Neujmin">28P/Neujmin</a></li>

<li><a href="29P/Schwassmann%E2%80%93Wachmann" title="29P/Schwassmann–Wachmann">29P/Schwassmann–Wachmann</a></li>

<li><a href="30P/Reinmuth" title="30P/Reinmuth">30P/Reinmuth</a></li>

<li><a href="31P/Schwassmann%E2%80%93Wachmann" title="31P/Schwassmann–Wachmann">31P/Schwassmann–Wachmann</a></li>

<li><a href="32P/Comas_Sol%C3%A0" title="32P/Comas Solà">32P/Comas Solà</a></li>

<li><a href="33P/Daniel" title="33P/Daniel">33P/Daniel</a></li>

<li><a href="35P/Herschel%E2%80%93Rigollet" title="35P/Herschel–Rigollet">35P/Herschel–Rigollet</a></li>

<li><a href="36P/Whipple" title="36P/Whipple">36P/Whipple</a></li>

<li><a href="37P/Forbes" title="37P/Forbes">37P/Forbes</a></li>

<li><a href="38P/Stephan%E2%80%93Oterma" title="38P/Stephan–Oterma">38P/Stephan–Oterma</a></li>

<li><a href="39P/Oterma" title="39P/Oterma">39P/Oterma</a></li>

<li><a href="40P/V%C3%A4is%C3%A4l%C3%A4" title="40P/Väisälä">40P/Väisälä</a></li>

<li><a href="41P/Tuttle%E2%80%93Giacobini%E2%80%93Kres%C3%A1k" title="41P/Tuttle–Giacobini–Kresák">41P/Tuttle–Giacobini–Kresák</a></li>

<li><a href="42P/Neujmin" title="42P/Neujmin">42P/Neujmin</a></li>

<li><a href="43P/Wolf%E2%80%93Harrington" title="43P/Wolf–Harrington">43P/Wolf–Harrington</a></li>

<li><a href="44P/Reinmuth" title="44P/Reinmuth">44P/Reinmuth</a></li>

<li><a href="45P/Honda%E2%80%93Mrkos%E2%80%93Pajdu%C5%A1%C3%A1kov%C3%A1" title="45P/Honda–Mrkos–Pajdušáková">45P/Honda–Mrkos–Pajdušáková</a></li>

<li><a href="46P/Wirtanen" title="46P/Wirtanen">46P/Wirtanen</a></li>

<li><a href="47P/Ashbrook%E2%80%93Jackson" title="47P/Ashbrook–Jackson">47P/Ashbrook–Jackson</a></li>

<li><a href="48P/Johnson" title="48P/Johnson">48P/Johnson</a></li>

<li><a href="49P/Arend%E2%80%93Rigaux" title="49P/Arend–Rigaux">49P/Arend–Rigaux</a></li>

<li><a href="50P/Arend" title="50P/Arend">50P/Arend</a></li>

<li><a href="51P/Harrington" title="51P/Harrington">51P/Harrington</a></li>

<li><a href="52P/Harrington%E2%80%93Abell" title="52P/Harrington–Abell">52P/Harrington–Abell</a></li>

<li><a href="53P/Van_Biesbroeck" title="53P/Van Biesbroeck">53P/Van Biesbroeck</a></li>

<li><a href="54P/de_Vico%E2%80%93Swift%E2%80%93NEAT" title="54P/de Vico–Swift–NEAT">54P/de Vico–Swift–NEAT</a></li>

<li><a href="55P/Tempel%E2%80%93Tuttle" title="55P/Tempel–Tuttle">55P/Tempel–Tuttle</a></li>

<li><a href="56P/Slaughter%E2%80%93Burnham" title="56P/Slaughter–Burnham">56P/Slaughter–Burnham</a></li>

<li><a href="57P/du_Toit%E2%80%93Neujmin%E2%80%93Delporte" title="57P/du Toit–Neujmin–Delporte">57P/du Toit–Neujmin–Delporte</a></li>

<li><a href="58P/Jackson%E2%80%93Neujmin" title="58P/Jackson–Neujmin">58P/Jackson–Neujmin</a></li>

<li><a href="59P/Kearns%E2%80%93Kwee" title="59P/Kearns–Kwee">59P/Kearns–Kwee</a></li>

<li><a href="60P/Tsuchinshan" title="60P/Tsuchinshan">60P/Tsuchinshan</a></li>

<li><a href="61P/Shajn%E2%80%93Schaldach" title="61P/Shajn–Schaldach">61P/Shajn–Schaldach</a></li>

<li><a href="62P/Tsuchinshan" title="62P/Tsuchinshan">62P/Tsuchinshan</a></li>

<li><a href="64P/Swift%E2%80%93Gehrels" title="64P/Swift–Gehrels">64P/Swift–Gehrels</a></li>

<li><a href="67P/Churyumov%E2%80%93Gerasimenko" title="67P/Churyumov–Gerasimenko">67P/Churyumov–Gerasimenko</a></li>

<li><a href="68P/Klemola" title="68P/Klemola">68P/Klemola</a></li>

<li><a href="69P/Taylor" title="69P/Taylor">69P/Taylor</a></li>

<li><a href="70P/Kojima" title="70P/Kojima">70P/Kojima</a></li>

<li><a href="71P/Clark" title="71P/Clark">71P/Clark</a></li>

<li><a href="72P/Denning%E2%80%93Fujikawa" title="72P/Denning–Fujikawa">72P/Denning–Fujikawa</a></li>

<li><a href="73P/Schwassmann%E2%80%93Wachmann" title="73P/Schwassmann–Wachmann">73P/Schwassmann–Wachmann</a></li>

<li><a href="74P/Smirnova%E2%80%93Chernykh" title="74P/Smirnova–Chernykh">74P/Smirnova–Chernykh</a></li>

<li><a href="75D/Kohoutek" title="75D/Kohoutek">75D/Kohoutek</a></li>

<li><a href="76P/West%E2%80%93Kohoutek%E2%80%93Ikemura" title="76P/West–Kohoutek–Ikemura">76P/West–Kohoutek–Ikemura</a></li>

<li><a href="77P/Longmore" title="77P/Longmore">77P/Longmore</a></li>

<li><a href="78P/Gehrels" title="78P/Gehrels">78P/Gehrels</a></li>

<li><a href="79P/du_Toit%E2%80%93Hartley" title="79P/du Toit–Hartley">79P/du Toit–Hartley</a></li>

<li><a href="80P/Peters%E2%80%93Hartley" title="80P/Peters–Hartley">80P/Peters–Hartley</a></li>

<li><a href="82P/Gehrels" title="82P/Gehrels">82P/Gehrels</a></li>

<li><a href="83D/Russell" title="83D/Russell">83D/Russell</a></li>

<li><a href="84P/Giclas" title="84P/Giclas">84P/Giclas</a></li>

<li><a href="85D/Boethin" title="85D/Boethin">85D/Boethin</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">After 1985<br>(notable)</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="88P/Howell" title="88P/Howell">88P/Howell</a></li>

<li><a href="92P/Sanguin" title="92P/Sanguin">92P/Sanguin</a></li>

<li><a href="96P/Machholz" title="96P/Machholz">96P/Machholz</a></li>

<li><a href="97P/Metcalf%E2%80%93Brewington" title="97P/Metcalf–Brewington">97P/Metcalf–Brewington</a></li>

<li><a href="103P/Hartley" title="103P/Hartley">103P/Hartley</a></li>

<li><a href="4015_Wilson%E2%80%93Harrington" title="4015 Wilson–Harrington">107P/Wilson–Harrington</a></li>

<li><a href="108P/Ciffr%C3%A9o" title="108P/Ciffréo">108P/Ciffréo</a></li>

<li><a href="Comet_Swift%E2%80%93Tuttle" title="Comet Swift–Tuttle">109P/Swift–Tuttle</a></li>

<li><a href="141P/Machholz" title="141P/Machholz">141P/Machholz</a></li>

<li><a href="144P/Kushida" title="144P/Kushida">144P/Kushida</a></li>

<li><a href="147P/Kushida%E2%80%93Muramatsu" title="147P/Kushida–Muramatsu">147P/Kushida–Muramatsu</a></li>

<li><a href="153P/Ikeya%E2%80%93Zhang" title="153P/Ikeya–Zhang">153P/Ikeya–Zhang</a></li>

<li><a href="156P/Russell%E2%80%93LINEAR" title="156P/Russell–LINEAR">156P/Russell–LINEAR</a></li>

<li><a href="161P/Hartley%E2%80%93IRAS" title="161P/Hartley–IRAS">161P/Hartley–IRAS</a></li>

<li><a href="162P/Siding_Spring" title="162P/Siding Spring">162P/Siding Spring</a></li>

<li><a href="168P/Hergenrother" title="168P/Hergenrother">168P/Hergenrother</a></li>

<li><a href="177P/Barnard" title="177P/Barnard">177P/Barnard</a></li>

<li><a href="205P/Giacobini" title="205P/Giacobini">205P/Giacobini</a></li>

<li><a href="209P/LINEAR" title="209P/LINEAR">209P/LINEAR</a></li>

<li><a href="249P/LINEAR" title="249P/LINEAR">249P/LINEAR</a></li>

<li><a href="252P/LINEAR" title="252P/LINEAR">252P/LINEAR</a></li>

<li><a href="273P/Pons%E2%80%93Gambart" title="273P/Pons–Gambart">273P/Pons–Gambart</a></li>

<li><a href="289P/Blanpain" title="289P/Blanpain">289P/Blanpain</a></li>

<li><a href="311P/PanSTARRS" title="311P/PanSTARRS">311P/PanSTARRS</a></li>

<li><a href="332P/Ikeya%E2%80%93Murakami" title="332P/Ikeya–Murakami">332P/Ikeya–Murakami</a></li>

<li><a href="333P/LINEAR" title="333P/LINEAR">333P/LINEAR</a></li>

<li><a href="354P/LINEAR" title="354P/LINEAR">354P/LINEAR</a></li>

<li><a href="460P/PanSTARRS" title="460P/PanSTARRS">460P/PanSTARRS</a></li></ul>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;"><a href="Asteroid#Terminology" title="Asteroid">Comet-like<br>asteroids</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="596_Scheila" title="596 Scheila">596 Scheila</a></li>

<li><a href="2060_Chiron" title="2060 Chiron">2060 Chiron</a> (95P)</li>

<li><a href="4015_Wilson%E2%80%93Harrington" title="4015 Wilson–Harrington">4015 Wilson–Harrington</a> (107P)</li>

<li><a href="7968_Elst%E2%80%93Pizarro" title="7968 Elst–Pizarro">7968 Elst–Pizarro</a> (133P)</li>

<li><a href="165P/LINEAR" title="165P/LINEAR">165P/LINEAR</a></li>

<li><a href="167P/CINEOS" title="167P/CINEOS">167P/CINEOS</a></li>

<li><a href="60558_Echeclus" title="60558 Echeclus">60558 Echeclus</a> (174P)</li>

<li><a href="118401_LINEAR" title="118401 LINEAR">118401 LINEAR</a> (176P)</li>

<li><a href="259P/Garradd" title="259P/Garradd">259P/Garradd</a></li>

<li><a href="311P/PanSTARRS" title="311P/PanSTARRS">311P/PanSTARRS</a></li>

<li><a href="324P/La_Sagra" title="324P/La Sagra">324P/La Sagra</a></li>

<li><a href="331P/Gibbs" title="331P/Gibbs">331P/Gibbs</a></li>

<li><a href="354P/LINEAR" title="354P/LINEAR">354P/LINEAR</a></li>

<li><a href="358P/PANSTARRS" class="mw-redirect" title="358P/PANSTARRS">358P/PANSTARRS</a></li>

<li><a href="P/2013_R3_(Catalina-PANSTARRS)" class="mw-redirect" title="P/2013 R3 (Catalina-PANSTARRS)">P/2013 R3 (Catalina-PANSTARRS)</a></li>

</div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;"><a href="Lost_comet" title="Lost comet">Lost</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:1%;text-align: center;">Recovered</th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em">

<ul><li><a href="9P/Tempel" class="mw-redirect" title="9P/Tempel">9P/Tempel</a></li>