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mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Go to an article in another language. Available in 13 languages" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-13" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">13 languages</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%82%D8%A7%D8%A6%D9%85%D8%A9_%D8%A7%D9%84%D9%83%D9%88%D9%8A%D9%83%D8%A8%D8%A7%D8%AA_%D8%A7%D9%84%D9%85%D9%81%D9%82%D9%88%D8%AF%D8%A9" title="قائمة الكويكبات المفقودة – Arabic" lang="ar" hreflang="ar" data-title="قائمة الكويكبات المفقودة" data-language-autonym="العربية" data-language-local-name="Arabic" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Asteroide_perdut" title="Asteroide perdut – Catalan" lang="ca" hreflang="ca" data-title="Asteroide perdut" data-language-autonym="Català" data-language-local-name="Catalan" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Asteroide_perdido" title="Asteroide perdido – Spanish" lang="es" hreflang="es" data-title="Asteroide perdido" data-language-autonym="Español" data-language-local-name="Spanish" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D8%B3%DB%8C%D8%A7%D8%B1%DA%A9_%DA%AF%D9%85%E2%80%8C%D8%B4%D8%AF%D9%87" title="سیارک گم‌شده – Persian" lang="fa" hreflang="fa" data-title="سیارک گم‌شده" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Plan%C3%A8te_mineure_perdue" title="Planète mineure perdue – French" lang="fr" hreflang="fr" data-title="Planète mineure perdue" data-language-autonym="Français" data-language-local-name="French" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-hi mw-list-item"><a href="https://hi.wikipedia.org/wiki/%E0%A4%96%E0%A5%8B%E0%A4%AF%E0%A4%BE_%E0%A4%B9%E0%A5%80%E0%A4%A8_%E0%A4%97%E0%A5%8D%E0%A4%B0%E0%A4%B9" title="खोया हीन ग्रह – Hindi" lang="hi" hreflang="hi" data-title="खोया हीन ग्रह" data-language-autonym="हिन्दी" data-language-local-name="Hindi" class="interlanguage-link-target"><span>हिन्दी</span></a></li><li class="interlanguage-link interwiki-hr mw-list-item"><a href="https://hr.wikipedia.org/wiki/Izgubljeni_asteroid" title="Izgubljeni asteroid – Croatian" lang="hr" hreflang="hr" data-title="Izgubljeni asteroid" data-language-autonym="Hrvatski" data-language-local-name="Croatian" class="interlanguage-link-target"><span>Hrvatski</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Zagubione_planetoidy" title="Zagubione planetoidy – Polish" lang="pl" hreflang="pl" data-title="Zagubione planetoidy" data-language-autonym="Polski" data-language-local-name="Polish" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-pt mw-list-item"><a href="https://pt.wikipedia.org/wiki/Planeta_menor_perdido" title="Planeta menor perdido – Portuguese" lang="pt" hreflang="pt" data-title="Planeta menor perdido" data-language-autonym="Português" data-language-local-name="Portuguese" class="interlanguage-link-target"><span>Português</span></a></li><li class="interlanguage-link interwiki-ro mw-list-item"><a href="https://ro.wikipedia.org/wiki/Asteroid_pierdut" title="Asteroid pierdut – Romanian" lang="ro" hreflang="ro" data-title="Asteroid pierdut" data-language-autonym="Română" data-language-local-name="Romanian" class="interlanguage-link-target"><span>Română</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/%D0%9F%D0%BE%D1%82%D0%B5%D1%80%D1%8F%D0%BD%D0%BD%D0%B0%D1%8F_%D0%BC%D0%B0%D0%BB%D0%B0%D1%8F_%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0" title="Потерянная малая планета – Russian" lang="ru" hreflang="ru" data-title="Потерянная малая планета" data-language-autonym="Русский" data-language-local-name="Russian" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/%D0%92%D1%82%D1%80%D0%B0%D1%87%D0%B5%D0%BD%D0%B0_%D0%BC%D0%B0%D0%BB%D0%B0_%D0%BF%D0%BB%D0%B0%D0%BD%D0%B5%D1%82%D0%B0" title="Втрачена мала планета – Ukrainian" lang="uk" hreflang="uk" data-title="Втрачена мала планета" data-language-autonym="Українська" data-language-local-name="Ukrainian" class="interlanguage-link-target"><span>Українська</span></a></li><li class="interlanguage-link interwiki-zh mw-list-item"><a href="https://zh.wikipedia.org/wiki/%E8%BF%B7%E8%B9%A4%E5%B0%8F%E8%A1%8C%E6%98%9F" title="迷蹤小行星 – Chinese" lang="zh" hreflang="zh" data-title="迷蹤小行星" data-language-autonym="中文" data-language-local-name="Chinese" class="interlanguage-link-target"><span>中文</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q6684357#sitelinks-wikipedia" title="Edit interlanguage links" class="wbc-editpage">Edit links</a></span></div> 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</nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Page tools"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Appearance"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Appearance</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" 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orbits are not known accurately enough to find them again</div> <p class="mw-empty-elt"> </p> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:Minor_planet_count.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Minor_planet_count.svg/280px-Minor_planet_count.svg.png" decoding="async" width="280" height="142" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/18/Minor_planet_count.svg/420px-Minor_planet_count.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/18/Minor_planet_count.svg/560px-Minor_planet_count.svg.png 2x" data-file-width="790" data-file-height="400" /></a><figcaption>More than 700,000 <a href="/wiki/Minor_planet" title="Minor planet">minor planets</a> have been observed, many of which must be considered lost due to insufficient observational data.<sup id="cite_ref-MPC-Running-Tallies_1-0" class="reference"><a href="#cite_note-MPC-Running-Tallies-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-blair_2-0" class="reference"><a href="#cite_note-blair-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></figcaption></figure> <p>A <a href="/wiki/Minor_planet" title="Minor planet">minor planet</a> is "<b>lost</b>" when today's observers cannot find it, because its location is too <a href="/wiki/Uncertainty_parameter" title="Uncertainty parameter">uncertain</a> to target observations. This happens if the <a href="/wiki/Orbital_elements" title="Orbital elements">orbital elements</a> of a minor planet are not known accurately enough, typically because the <a href="/wiki/Observation_arc" title="Observation arc">observation arc</a> for the object is too short, or too few observations were made before the object became unobservable (e.g. too faint due to increasing distance, or too close to the Sun to view at night). </p><p>By some definitions thousands, if not tens of thousands, of mostly small observed minor planets are lost.<sup id="cite_ref-blair_2-1" class="reference"><a href="#cite_note-blair-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> Some lost minor planets discovered in decades past cannot be found because the available observational data is insufficient for reliable <a href="/wiki/Orbit_determination" title="Orbit determination">orbit determination</a>. With limited information astronomers cannot know where to look for the object at future dates. </p><p>Lost objects are sometimes <b>recovered</b> when serendipitously re-observed by a later <a href="/wiki/Astronomical_survey" title="Astronomical survey">astronomical survey</a>. If the orbital elements of the newly found object are sufficiently close to those of the earlier lost object, the two may be equated. This can be established by calculating backwards the "new" object's orbit (once it is firmly known) and checking past positions against those previously recorded for the lost object. This usually greatly extends the object's arc length, thus fixing the orbit much more precisely. The back-orbit calculations are especially tricky for <a href="/wiki/Lost_comet" title="Lost comet">lost comets</a> because their orbits can be affected by non-gravitational forces, such as emission of jets of gas from the comet nucleus. Many previously lost <a href="/wiki/Asteroid" title="Asteroid">asteroids</a> (a type of minor planet) were rediscovered in the 1980s and 1990s, but many minor planets are still lost.<sup id="cite_ref-brit1_3-0" class="reference"><a href="#cite_note-brit1-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Overview">Overview</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=1" title="Edit section: Overview"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/File:NEA-sizes-vs-uncertainties-compact.PNG" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/NEA-sizes-vs-uncertainties-compact.PNG/280px-NEA-sizes-vs-uncertainties-compact.PNG" decoding="async" width="280" height="253" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/7/70/NEA-sizes-vs-uncertainties-compact.PNG/420px-NEA-sizes-vs-uncertainties-compact.PNG 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/7/70/NEA-sizes-vs-uncertainties-compact.PNG/560px-NEA-sizes-vs-uncertainties-compact.PNG 2x" data-file-width="940" data-file-height="850" /></a><figcaption> The orbits of kilometre class <a href="/wiki/Near-Earth_asteroid" class="mw-redirect" title="Near-Earth asteroid">NEAs</a> are generally well known, though a few have been lost. However, large numbers of smaller NEAs have highly uncertain orbits<sup id="cite_ref-MPC-NEA_4-0" class="reference"><a href="#cite_note-MPC-NEA-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup></figcaption></figure> <p>This is a small selection of some early lost or notable asteroids with their discovery and rediscovery dates. <i>(A more detailed description for some of these minor planets can be found in the <a href="#20th-century_recoveries">following sections</a>.)</i> The true number of lost asteroids may be over 150,000.<sup id="cite_ref-blair_2-2" class="reference"><a href="#cite_note-blair-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> There are also about 30,000 unnumbered bodies with a <a href="/wiki/Uncertainty_Parameter_U" class="mw-redirect" title="Uncertainty Parameter U">condition code of U = 9</a>, indicating the highest possible uncertainty of their orbit determination. Many of these bodies have been observed years if not decades ago and must be considered lost.<sup id="cite_ref-ConditionCode-of-9_5-0" class="reference"><a href="#cite_note-ConditionCode-of-9-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-ConditionCode-of-9_6-0" class="reference"><a href="#cite_note-ConditionCode-of-9-6"><span class="cite-bracket">[</span>a<span class="cite-bracket">]</span></a></sup> There are also more than a thousand <a href="/wiki/Near-Earth_object" title="Near-Earth object">near-Earth objects</a> (NEOs) with an <a href="/wiki/Observation_arc" title="Observation arc">observation arc</a> of one or two days only.<sup id="cite_ref-JPL-2day_7-0" class="reference"><a href="#cite_note-JPL-2day-7"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> </p> <table class="infobox floatleft" style="padding: 0 0 0 18px ; font-size: 1em; background-color: #fff;"> <tbody><tr> <td> <table class="wikitable"> <tbody><tr> <th rowspan="2" style="vertical-align: middle;">Designation </th> <th colspan="2">Year of </th></tr> <tr> <th>discovery </th> <th>recovery </th></tr> <tr> <td><a href="/wiki/132_Aethra" title="132 Aethra">132 Aethra</a></td> <td>1873</td> <td>1922<sup id="cite_ref-price_8-0" class="reference"><a href="#cite_note-price-8"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/1892_X" class="mw-redirect" title="1892 X">1892 X</a> <span style="font-size:85%;">(<a href="/wiki/330_Adalberta" title="330 Adalberta">330 Adalberta</a>)</span></td> <td>1892</td> <td><span style="font-size:85%;">false positive</span><sup id="cite_ref-1982-x_9-0" class="reference"><a href="#cite_note-1982-x-9"><span class="cite-bracket">[</span>b<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/452_Hamiltonia" title="452 Hamiltonia">452 Hamiltonia</a></td> <td>1899</td> <td>1981 </td></tr> <tr> <td><a href="/wiki/473_Nolli" title="473 Nolli">473 Nolli</a></td> <td>1901</td> <td>1987 </td></tr> <tr> <td><a href="/wiki/List_of_minor_planets:_12001%E2%80%9313000#126" title="List of minor planets: 12001–13000"><span class="nowrap">(12126) 1999 RM<sub>11</sub></span></a><br />(A904 RD)</td> <td>1904</td> <td>1999 </td></tr> <tr> <td><a href="/wiki/719_Albert" title="719 Albert">719 Albert</a></td> <td>1911</td> <td>2000 </td></tr> <tr> <td><a href="/wiki/724_Hapag" title="724 Hapag">724 Hapag</a></td> <td>1911</td> <td>1988 </td></tr> <tr> <td><a href="/wiki/843_Nicolaia" title="843 Nicolaia">843 Nicolaia</a></td> <td>1916</td> <td>1981 </td></tr> <tr> <td><a href="/wiki/878_Mildred" title="878 Mildred">878 Mildred</a></td> <td>1916</td> <td>1991 </td></tr> <tr> <td><a href="/wiki/1009_Sirene" title="1009 Sirene">1009 Sirene</a></td> <td>1923</td> <td>1982<sup id="cite_ref-IAUC_1009_10-0" class="reference"><a href="#cite_note-IAUC_1009-10"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/1026_Ingrid" title="1026 Ingrid">1026 Ingrid</a></td> <td>1923</td> <td>1986 </td></tr></tbody></table> </td> <td> <table class="wikitable" style="margin-left: 12px"> <tbody><tr> <th rowspan="2" style="vertical-align: middle;">Name </th> <th colspan="2">Year of </th></tr> <tr> <th>discovery </th> <th>recovery </th></tr> <tr> <td><a href="/wiki/3789_Zhongguo" title="3789 Zhongguo">3789 Zhongguo</a></td> <td>1928</td> <td>1986 </td></tr> <tr> <td><a href="/wiki/1179_Mally" title="1179 Mally">1179 Mally</a></td> <td>1931</td> <td>1986 </td></tr> <tr> <td><a href="/wiki/1862_Apollo" title="1862 Apollo">1862 Apollo</a></td> <td>1932</td> <td>1973 </td></tr> <tr> <td><a href="/wiki/2101_Adonis" title="2101 Adonis">2101 Adonis</a></td> <td>1936</td> <td>1977 </td></tr> <tr> <td><a href="/wiki/69230_Hermes" title="69230 Hermes">69230 Hermes</a></td> <td>1937</td> <td>2003<sup id="cite_ref-MPC-discovery-circumstances_11-0" class="reference"><a href="#cite_note-MPC-discovery-circumstances-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-MPEC-03T74_12-0" class="reference"><a href="#cite_note-MPEC-03T74-12"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><a href="/wiki/1537_Transylvania" title="1537 Transylvania">1537 Transylvania</a></td> <td>1940</td> <td>1981 </td></tr> <tr> <td><a href="/wiki/1922_Zulu" title="1922 Zulu">1922 Zulu</a></td> <td>1949</td> <td>1974 </td></tr> <tr> <td><a href="/wiki/(29075)_1950_DA" title="(29075) 1950 DA">(29075) 1950 DA</a></td> <td>1950</td> <td>2000 </td></tr> <tr> <td><a href="/wiki/1916_Boreas" title="1916 Boreas">1916 Boreas</a></td> <td>1953<sup id="cite_ref-MPC-discovery-circumstances_11-1" class="reference"><a href="#cite_note-MPC-discovery-circumstances-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup></td> <td>1976 </td></tr> <tr> <td><a href="/wiki/3494_Purple_Mountain" title="3494 Purple Mountain">3494 Purple Mountain</a></td> <td>1962</td> <td>1980 </td></tr> <tr> <td><a href="/wiki/7796_J%C3%A1racimrman" title="7796 Járacimrman">7796 Járacimrman</a></td> <td>1973</td> <td>1996 </td></tr> <tr style="background-color: #f4f4f4"> <td> </td> <td></td> <td> </td></tr></tbody></table> </td></tr> <tr> <td colspan="2"> <table class="wikitable" style="width: 100%"> <tbody><tr> <th rowspan="2" style="vertical-align: middle;">Designation </th> <th colspan="2">Year of </th> <th rowspan="2" style="vertical-align: middle;">Notes </th> <th rowspan="2" style="vertical-align: middle;"><a href="/wiki/Minor_Planet_Center" title="Minor Planet Center">MPC</a> </th></tr> <tr> <th>discovery </th> <th>recovery </th></tr> <tr> <td><a href="/w/index.php?title=1927_LA&action=edit&redlink=1" class="new" title="1927 LA (page does not exist)">1927 LA</a> <sup id="cite_ref-MPC-(1927_LA)_13-0" class="reference"><a href="#cite_note-MPC-(1927_LA)-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup></td> <td>1927</td> <td><span style="font-size:85%;">false positive</span><sup id="cite_ref-1927LA_14-0" class="reference"><a href="#cite_note-1927LA-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup></td> <td>Observed 3 times between 1 June 1927 and 5 July 1927</td> <td><small><a rel="nofollow" class="external text" href="https://minorplanetcenter.net/db_search/show_object?object_id=1927+LA">MPC</a></small> </td></tr> <tr> <td><a href="/wiki/1991_BA" title="1991 BA">1991 BA</a></td> <td>1991</td> <td>still lost</td> <td>Passed within a <a href="/wiki/Lunar_distance_(astronomy)" class="mw-redirect" title="Lunar distance (astronomy)">lunar distance</a> of Earth</td> <td><small><a rel="nofollow" class="external text" href="https://minorplanetcenter.net/db_search/show_object?object_id=1991+BA">MPC</a></small> </td></tr> <tr> <td><span class="nowrap"><a href="/wiki/1995_SN55" class="mw-redirect" title="1995 SN55">1995 SN<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">55</span></span></a></span></td> <td>1995</td> <td>2020</td> <td>3:5 <a href="/wiki/Resonant_trans-Neptunian_object" title="Resonant trans-Neptunian object">resonant TNO</a> initially thought to be a large <a href="/wiki/Centaur_(minor_planet)" class="mw-redirect" title="Centaur (minor planet)">centaur</a></td> <td><small><a rel="nofollow" class="external text" href="https://minorplanetcenter.net/db_search/show_object?object_id=1995+SN55">MPC</a></small> </td></tr> <tr> <td><span class="nowrap"><a href="/wiki/2007_WD5" title="2007 WD5">2007 WD<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">5</span></span></a></span></td> <td>2007</td> <td>still lost</td> <td>Passed close to Mars</td> <td><small><a rel="nofollow" class="external text" href="https://minorplanetcenter.net/db_search/show_object?object_id=2007+WD5">MPC</a></small> </td></tr> <tr> <td><a href="/wiki/6344_P-L" title="6344 P-L">6344 P-L</a></td> <td>1960</td> <td>2007<sup id="cite_ref-Sciencedaily_6344_P-L_15-0" class="reference"><a href="#cite_note-Sciencedaily_6344_P-L-15"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></td> <td><a href="/wiki/Potentially_hazardous_object" title="Potentially hazardous object">Potentially hazardous object</a>; probably a <a href="/wiki/Extinct_comet" title="Extinct comet">dormant comet</a></td> <td><small><a rel="nofollow" class="external text" href="https://minorplanetcenter.net/db_search/show_object?object_id=6344+P-L">MPC</a></small> </td></tr></tbody></table> </td></tr></tbody></table> <div style="clear:both;" class=""></div> <div class="mw-heading mw-heading2"><h2 id="20th-century_recoveries">20th-century recoveries</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=2" title="Edit section: 20th-century recoveries"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The number of asteroids that were only observed once and not re-observed grew throughout the 19th and 20th centuries, but improved telescopes, searches, and detection techniques led to resolution of most of these cases between 1970 and 2000. There are earlier examples also, such as <a href="/wiki/132_Aethra" title="132 Aethra">132 Aethra</a>, which was lost between 1873 and 1922.<sup id="cite_ref-price_8-1" class="reference"><a href="#cite_note-price-8"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading3"><h3 id="1970s">1970s</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=3" title="Edit section: 1970s"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable" style="font-size: 0.9em"> <tbody><tr> <th style="width: 100px">Recovered body </th> <th>Description </th></tr> <tr> <td><b><a href="/wiki/1862_Apollo" title="1862 Apollo">1862 Apollo</a></b> </td> <td>Apollo is a <a href="/wiki/Q-type_asteroid" title="Q-type asteroid">Q-type asteroid</a>, discovered by <a href="/wiki/Karl_Reinmuth" class="mw-redirect" title="Karl Reinmuth">Karl Reinmuth</a> in 1932, but lost and not recovered until 1973. Another <a href="/wiki/Apollo_asteroid" title="Apollo asteroid">Apollo asteroid</a> is <a href="/wiki/2101_Adonis" title="2101 Adonis">2101 Adonis</a>, discovered by <a href="/wiki/Eugene_Delporte" class="mw-redirect" title="Eugene Delporte">Eugene Delporte</a> in 1936 and lost until 1977 when it was rediscovered by <a href="/wiki/Charles_T._Kowal" title="Charles T. Kowal">Charles T. Kowal</a>. It was also one of the first <a href="/wiki/Near-Earth_asteroids" class="mw-redirect" title="Near-Earth asteroids">near-Earth asteroids</a> to be discovered. </td></tr> <tr> <td><b><a href="/wiki/1916_Boreas" title="1916 Boreas">1916 Boreas</a></b> </td> <td>The <a href="/wiki/Amor_asteroid" title="Amor asteroid">Amor asteroid</a> Boreas, provisionally designated 1953 RA, was discovered on 1 September 1953 by <a href="/wiki/Sylvain_Julien_Victor_Arend" class="mw-redirect" title="Sylvain Julien Victor Arend">Sylvain Julien Victor Arend</a> at the <a href="/wiki/Royal_Observatory_of_Belgium" title="Royal Observatory of Belgium">Royal Observatory of Belgium</a>, and rediscovered in 1974 by Richard Eugene McCrosky, G. Schwartz and JH Bulger based on a predicted position by <a href="/wiki/Brian_G._Marsden" title="Brian G. Marsden">Brian G. Marsden</a>.<sup id="cite_ref-MPC-discovery-circumstances_11-2" class="reference"><a href="#cite_note-MPC-discovery-circumstances-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-IAUC-2710_16-0" class="reference"><a href="#cite_note-IAUC-2710-16"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/1922_Zulu" title="1922 Zulu">1922 Zulu</a></b> </td> <td>The <a href="/wiki/Outer_asteroid_belt" class="mw-redirect" title="Outer asteroid belt">outer main-belt</a> <a href="/wiki/Asteroid" title="Asteroid">asteroid</a>, provisionally designated 1949 HC, was discovered on 25 April 1949 by <a href="/wiki/Ernest_Leonard_Johnson" title="Ernest Leonard Johnson">Ernest Leonard Johnson</a> at <a href="/wiki/Johannesburg_(UO)" class="mw-redirect" title="Johannesburg (UO)">Johannesburg (UO)</a>.<sup id="cite_ref-MPC-discovery-circumstances_11-3" class="reference"><a href="#cite_note-MPC-discovery-circumstances-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> It is one of very few asteroids located in the 2:1 <a href="/wiki/Orbital_resonance" title="Orbital resonance">mean-motion resonance</a> with <a href="/wiki/Jupiter" title="Jupiter">Jupiter</a>.<sup id="cite_ref-Roig-2002_17-0" class="reference"><a href="#cite_note-Roig-2002-17"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> This asteroid was lost shortly after discovery and only rediscovered in 1974 by Richard Eugene McCrosky, Cheng-yuan Shao and JH Bulger based on a predicted position by C. M. Bardwell of the <a href="/wiki/Cincinnati_Observatory" title="Cincinnati Observatory">Cincinnati Observatory</a>.<sup id="cite_ref-MPC-discovery-circumstances_11-4" class="reference"><a href="#cite_note-MPC-discovery-circumstances-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-IAUC-2710_16-1" class="reference"><a href="#cite_note-IAUC-2710-16"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> </td></tr></tbody></table> <div class="mw-heading mw-heading3"><h3 id="1980s_and_1990s">1980s and 1990s</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=4" title="Edit section: 1980s and 1990s"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Leif Kahl Kristensen at the <a href="/wiki/University_of_Aarhus" class="mw-redirect" title="University of Aarhus">University of Aarhus</a> rediscovered <a href="/wiki/452_Hamiltonia" title="452 Hamiltonia">452 Hamiltonia</a> and <a href="/wiki/1537_Transylvania" title="1537 Transylvania">1537 Transylvania</a>, along with numerous other small objects, in 1981.<sup id="cite_ref-Gibson-1981_18-0" class="reference"><a href="#cite_note-Gibson-1981-18"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> At the time these results were published, only the nine numbered minor planets 330 Adalberta, 473 Nolli, 719 Albert, 724 Hapag, 843 Nicolaia, 878 Mildred, 1009 Sirene, 1026 Ingrid, and 1179 Mally (below) had remained unobserved since their discoveries:<sup id="cite_ref-Gibson-1981_18-1" class="reference"><a href="#cite_note-Gibson-1981-18"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p> <table class="wikitable" style="font-size: 0.9em"> <tbody><tr> <th style="width: 100px">Recovered body </th> <th>Description </th></tr> <tr> <td><b><a href="/wiki/330_Adalberta" title="330 Adalberta">330 Adalberta</a></b> </td> <td>The object originally named Adalberta, provisionally designated 1892 X, turned out to be an erroneous observation. The designation was later reassigned to A910 CB.<sup id="cite_ref-jpldata-330-Adalberta_19-0" class="reference"><a href="#cite_note-jpldata-330-Adalberta-19"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/843_Nicolaia" title="843 Nicolaia">843 Nicolaia</a></b> </td> <td>Nicolaia, provisionally designated 1916 AN, was rediscovered at the Heidelberg Astronomisches Rechen-Institut in 1981.<sup id="cite_ref-843-Nicolaia_20-0" class="reference"><a href="#cite_note-843-Nicolaia-20"><span class="cite-bracket">[</span>18<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/473_Nolli" title="473 Nolli">473 Nolli</a></b> </td> <td>Nolli, provisionally designated 1901 GC, was discovered by <a href="/wiki/Max_Wolf" title="Max Wolf">Max Wolf</a> on 13 February 1901, but it remained lost for many decades until it was recovered finally in 1987, 86 years later.<sup id="cite_ref-21" class="reference"><a href="#cite_note-21"><span class="cite-bracket">[</span>19<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/724_Hapag" title="724 Hapag">724 Hapag</a></b> </td> <td>Hapag had first been found by <a href="/wiki/Johann_Palisa" title="Johann Palisa">Johann Palisa</a> in 1911. It was given the provisional name 1911 NC, but was lost until it was rediscovered in 1988.<sup id="cite_ref-DoMPN_22-0" class="reference"><a href="#cite_note-DoMPN-22"><span class="cite-bracket">[</span>20<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-science-news_23-0" class="reference"><a href="#cite_note-science-news-23"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/719_Albert" title="719 Albert">719 Albert</a></b> </td> <td>Near-Earth asteroid 719 Albert (1911 MT) had also been found by <a href="/wiki/Johann_Palisa" title="Johann Palisa">Johann Palisa</a> in 1911. Due to inaccuracies in its computed orbit, Albert was also lost and not recovered until 2000, when Jeffrey A. Larsen located it using data from the <a href="/wiki/Spacewatch" title="Spacewatch">Spacewatch</a> asteroid survey project. At the time of its rediscovery, Albert was the last remaining "lost asteroid" among those assigned numbers (since <a href="/wiki/69230_Hermes" title="69230 Hermes">69230 Hermes</a> was not numbered until 2003).<sup id="cite_ref-science-news_23-1" class="reference"><a href="#cite_note-science-news-23"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/878_Mildred" title="878 Mildred">878 Mildred</a></b> </td> <td>Mildred, provisionally designated 1916 f, was originally discovered in 1916 using the <a href="/wiki/60-inch_Hale_telescope" class="mw-redirect" title="60-inch Hale telescope">60-inch Hale telescope</a> at the Californian <a href="/wiki/Mount_Wilson_Observatory" title="Mount Wilson Observatory">Mount Wilson Observatory</a>, but was subsequently lost until it was again observed on single nights in 1985 and 1991.<sup id="cite_ref-science-news_23-2" class="reference"><a href="#cite_note-science-news-23"><span class="cite-bracket">[</span>21<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-IAUC-5275_24-0" class="reference"><a href="#cite_note-IAUC-5275-24"><span class="cite-bracket">[</span>22<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/1009_Sirene" title="1009 Sirene">1009 Sirene</a></b> </td> <td>Sirene, provisionally designated 1923 PE, was recovered in 1982 by J. Gibson using exposures form the <a href="/wiki/Samuel_Oschin_Telescope" class="mw-redirect" title="Samuel Oschin Telescope">Samuel Oschin Telescope</a> at <a href="/wiki/Palomar_Observatory" title="Palomar Observatory">Palomar Observatory</a>, and he revised its ephemeris.<sup id="cite_ref-IAUC_1009_10-1" class="reference"><a href="#cite_note-IAUC_1009-10"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/1026_Ingrid" title="1026 Ingrid">1026 Ingrid</a></b> </td> <td>Ingrid was discovered by <a href="/wiki/Karl_Reinmuth" class="mw-redirect" title="Karl Reinmuth">Karl Reinmuth</a> on 13 August 1923 and given the <a href="/wiki/Provisional_designation_in_astronomy" title="Provisional designation in astronomy">provisional designation</a> 1923 NY.<sup id="cite_ref-MPC-discovery-circumstances_11-5" class="reference"><a href="#cite_note-MPC-discovery-circumstances-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> It was reidentified in 1986 by <a href="/wiki/Syuichi_Nakano" class="mw-redirect" title="Syuichi Nakano">Syuichi Nakano</a>.<sup id="cite_ref-IAUC-4281_25-0" class="reference"><a href="#cite_note-IAUC-4281-25"><span class="cite-bracket">[</span>23<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <td><b><a href="/wiki/1179_Mally" title="1179 Mally">1179 Mally</a></b> </td> <td>Mally was discovered by Max Wolf on 19 March 1931 and given the provisional designation 1931 FD.<sup id="cite_ref-MPC-discovery-circumstances_11-6" class="reference"><a href="#cite_note-MPC-discovery-circumstances-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> It was rediscovered in 1986 by <a href="/wiki/Lutz_Schmadel" class="mw-redirect" title="Lutz Schmadel">Lutz Schmadel</a>, <a href="/wiki/Richard_Martin_West" title="Richard Martin West">Richard Martin West</a> and <a href="/wiki/Hans-Emil_Schuster" title="Hans-Emil Schuster">Hans-Emil Schuster</a>.<sup id="cite_ref-IAUC-4278_26-0" class="reference"><a href="#cite_note-IAUC-4278-26"><span class="cite-bracket">[</span>24<span class="cite-bracket">]</span></a></sup> </td></tr></tbody></table> <p><b>Other notable recoveries</b> </p> <ul><li>While studying in Chicago in 1928, <a href="/wiki/Zhang_Yuzhe" title="Zhang Yuzhe">Zhang Yuzhe</a> discovered an asteroid that was given the provisional designation 1928 UF, and later the number 1125. He named it "China", or "中華" <i>Zhōnghuá</i>. However, this asteroid was not observed beyond its initial appearance and a precise orbit could not be calculated. In 1957, the <a href="/wiki/Purple_Mountain_Observatory" title="Purple Mountain Observatory">Purple Mountain Observatory</a> in China discovered a new asteroid, and with Zhang Yuzhe's agreement the new object <span class="nowrap">1957 UN<sub>1</sub></span> was reassigned the official designation <a href="/wiki/1125_China" title="1125 China">1125 China</a> in place of the lost 1928 UF. However, in 1986, the newly discovered object <span class="nowrap">1986 QK<sub>1</sub></span> was confirmed to be a rediscovery of the original 1928 UF, and this object was named <a href="/wiki/3789_Zhongguo" title="3789 Zhongguo">3789 Zhongguo</a>, which is also a name for China.<sup id="cite_ref-springer-3789-Zhongguo_27-0" class="reference"><a href="#cite_note-springer-3789-Zhongguo-27"><span class="cite-bracket">[</span>25<span class="cite-bracket">]</span></a></sup></li> <li>The near-Earth asteroid <a href="/wiki/(29075)_1950_DA" title="(29075) 1950 DA">(29075) 1950 DA</a> was discovered on 23 February 1950 by <a href="/wiki/Carl_Wirtanen" class="mw-redirect" title="Carl Wirtanen">Carl Wirtanen</a> at <a href="/wiki/Lick_Observatory" title="Lick Observatory">Lick Observatory</a>. It was observed for 17 days and then lost, since not enough observations were made to allow its orbit to be plotted. It was then rediscovered on 31 December 2000. The chance it will impact Earth on 16 March 2880 is about 1 in 4,000, or 0.025 percent.<sup id="cite_ref-JPL-risk-summary_28-0" class="reference"><a href="#cite_note-JPL-risk-summary-28"><span class="cite-bracket">[</span>26<span class="cite-bracket">]</span></a></sup></li> <li><a href="/wiki/7796_J%C3%A1racimrman" title="7796 Járacimrman">7796 Járacimrman</a> was discovered at the Czech <a href="/wiki/Kle%C5%A5_Observatory" title="Kleť Observatory">Kleť Observatory</a> on 16 January 1996 by <a href="/wiki/Zden%C4%9Bk_Moravec" title="Zdeněk Moravec">Zdeněk Moravec</a> and was designated 1996 BG. It was observed until April 1996 and then in June and July 1997. It was revealed, by <a href="/wiki/Precovery" title="Precovery">precovery</a>, to be a lost asteroid which had previously been observed twice: at the <a href="/wiki/Brera_Astronomical_Observatory" title="Brera Astronomical Observatory">Brera-Merate Observatory</a> in northern Italy on 12 December 1973 and at the Australian <a href="/wiki/Mount_Stromlo_Observatory" title="Mount Stromlo Observatory">Mount Stromlo Observatory</a> near Canberra, on 8 and 9 July 1990.</li></ul> <div class="mw-heading mw-heading2"><h2 id="21st_century">21st century</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=5" title="Edit section: 21st century"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p><b>Recently lost minor planets</b> </p> <ul><li><a href="/wiki/6Q0B44E" title="6Q0B44E">6Q0B44E</a> was discovered orbiting Earth in 2006.<sup id="cite_ref-Spacewatch_29-0" class="reference"><a href="#cite_note-Spacewatch-29"><span class="cite-bracket">[</span>27<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-6Q0B44E_30-0" class="reference"><a href="#cite_note-6Q0B44E-30"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> Its properties were consistent with being an artificial piece of <a href="/wiki/Space_debris" title="Space debris">space debris</a>,<sup id="cite_ref-6Q0B44E_30-1" class="reference"><a href="#cite_note-6Q0B44E-30"><span class="cite-bracket">[</span>28<span class="cite-bracket">]</span></a></sup> so it was not given a <a href="/wiki/Minor_planet_designation" class="mw-redirect" title="Minor planet designation">minor planet designation</a>. 6Q0B44E was lost in 2007, but another object XL8D89E was discovered on a very similar (but not identical) orbit in 2016. It is likely, though unproven, that both are the same object, which experiences non-gravitational acceleration (such as a slow gas leak) causing slight variations in its orbit.<sup id="cite_ref-XL8D89E_31-0" class="reference"><a href="#cite_note-XL8D89E-31"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup> XL8D89E was itself lost in 2018.<sup id="cite_ref-XL8D89E_31-1" class="reference"><a href="#cite_note-XL8D89E-31"><span class="cite-bracket">[</span>29<span class="cite-bracket">]</span></a></sup></li> <li><span class="nowrap"><a href="/wiki/2007_WD5" title="2007 WD5">2007 WD<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">5</span></span></a></span> is a 50 m (160 ft) <a href="/wiki/Apollo_asteroid" title="Apollo asteroid">Apollo-class</a> NEO and a <a href="/wiki/Mars-crosser" class="mw-redirect" title="Mars-crosser">Mars-crosser</a> discovered on 20 November 2007, by <a href="/wiki/Andrea_Boattini" title="Andrea Boattini">Andrea Boattini</a> of the <a href="/wiki/Catalina_Sky_Survey" title="Catalina Sky Survey">Catalina Sky Survey</a>.<sup id="cite_ref-jpldata-2007-WD5_32-0" class="reference"><a href="#cite_note-jpldata-2007-WD5-32"><span class="cite-bracket">[</span>30<span class="cite-bracket">]</span></a></sup> Early observations of <span class="nowrap">2007 WD<sub>5</sub></span> caused excitement amongst the scientific community when it was estimated as having as high as a 1 in 25 chance of <a href="/wiki/Impact_event" title="Impact event">colliding</a> with <a href="/wiki/Mars" title="Mars">Mars</a> on 30 January 2008.<sup id="cite_ref-NEO1228_33-0" class="reference"><a href="#cite_note-NEO1228-33"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup> However, by 9 January 2008 additional observations allowed NASA's Near Earth Object Program (NEOP) to reduce the uncertainty region resulting in only a 1-in-10,000 chance of impact.<sup id="cite_ref-NEO0109_34-0" class="reference"><a href="#cite_note-NEO0109-34"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup> <span class="nowrap">2007 WD<sub>5</sub></span> most likely passed Mars at a distance of 6.5 Mars radii. Due to this relatively small distance and the uncertainty level of the prior observations, the gravitational effects of Mars on its trajectory are unknown and, according to Steven Chesley of NASA's <a href="/wiki/Jet_Propulsion_Laboratory" title="Jet Propulsion Laboratory">JPL</a>-Near Earth Object program, <span class="nowrap">2007 WD<sub>5</sub></span> is currently considered "lost".<sup id="cite_ref-NEO1228_33-1" class="reference"><a href="#cite_note-NEO1228-33"><span class="cite-bracket">[</span>31<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-planetaryorgblog_35-0" class="reference"><a href="#cite_note-planetaryorgblog-35"><span class="cite-bracket">[</span>33<span class="cite-bracket">]</span></a></sup> The best fit trajectory had the asteroid passing within 21,000 km of Mars and only 16,000 km from its moon <a href="/wiki/Deimos_(moon)" title="Deimos (moon)">Deimos</a>.<sup id="cite_ref-NEO0109_34-1" class="reference"><a href="#cite_note-NEO0109-34"><span class="cite-bracket">[</span>32<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Horizons1223_36-0" class="reference"><a href="#cite_note-Horizons1223-36"><span class="cite-bracket">[</span>34<span class="cite-bracket">]</span></a></sup></li> <li><span class="nowrap"><a href="/wiki/2010_AU118" title="2010 AU118">2010 AU<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">118</span></span></a></span> is a kilometer-sized <a href="/wiki/Amor_asteroid" title="Amor asteroid">Amor-class</a> NEO and Mars-crosser discovered on 27 May 2010, by the <a href="/wiki/Wide-field_Infrared_Survey_Explorer" title="Wide-field Infrared Survey Explorer">Wide-field Infrared Survey Explorer</a> (WISE) spacecraft. The asteroid was only observed 19 times during 13–15 January 2010, and has not since been observed.<sup id="cite_ref-37" class="reference"><a href="#cite_note-37"><span class="cite-bracket">[</span>35<span class="cite-bracket">]</span></a></sup> Virtual clones of the asteroid that fit the uncertainty region in the known trajectory, showed a 1 in 770 million chance that the asteroid could have impacted the Earth on 2020 October 20.<sup id="cite_ref-summary_38-0" class="reference"><a href="#cite_note-summary-38"><span class="cite-bracket">[</span>36<span class="cite-bracket">]</span></a></sup> However, <a href="/wiki/NEODyS" title="NEODyS">NEODyS</a> lists the nominal 20 October 2020 Earth distance as 3 AU (450,000,000 km; 280,000,000 mi).<sup id="cite_ref-NEODyS2020_39-0" class="reference"><a href="#cite_note-NEODyS2020-39"><span class="cite-bracket">[</span>37<span class="cite-bracket">]</span></a></sup></li> <li>In 2007, the object <span class="nowrap">2007 RR<sub>9</sub></span> was found to be the near-Earth asteroid <a href="/wiki/6344_P%E2%80%93L" class="mw-redirect" title="6344 P–L">6344 P–L</a>, lost since 1960. It is a <a href="/wiki/Potentially_hazardous_object" title="Potentially hazardous object">potentially hazardous object</a> and probably a <a href="/wiki/Dormant_comet" class="mw-redirect" title="Dormant comet">dormant comet</a>, although it was not visibly outgassing at that time.<sup id="cite_ref-Sciencedaily_6344_P-L_15-1" class="reference"><a href="#cite_note-Sciencedaily_6344_P-L-15"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup></li></ul> <div class="mw-heading mw-heading2"><h2 id="See_also">See also</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=6" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/List_of_unnumbered_minor_planets#1900–1959" title="List of unnumbered minor planets">List of unnumbered minor planets § 1900–1959</a></li> <li><a href="/wiki/Lost_comet" title="Lost comet">Lost comet</a></li> <li><a href="/wiki/Precovery" title="Precovery">Precovery</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Notes">Notes</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=7" title="Edit section: Notes"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <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 reflist-lower-alpha"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-ConditionCode-of-9-6"><span class="mw-cite-backlink"><b><a href="#cite_ref-ConditionCode-of-9_6-0">^</a></b></span> <span class="reference-text">Note: this <span class="url"><a rel="nofollow" class="external text" href="https://ssd.jpl.nasa.gov/sbdb_query.cgi?obj_group=all;obj_kind=ast;obj_numbered=unn;OBJ_field=0;ORB_field=0;c1_group=ORB;c1_item=Cq;c1_op=%3D;c1_value=9;table_format=HTML;max_rows=100;format_option=comp;c_fields=AcCqCkCnCl;c_sort=ClA;.cgifields=format_option;.cgifields=obj_kind;.cgifields=obj_group;.cgifields=obj_numbered;.cgifields=ast_orbit_class;.cgifields=table_format;.cgifields=com_orbit_class&query=1">query at JPL's Small-Body Database</a></span> lists all unnamed asteroids with an orbital uncertainty of 9, which also includes recently discovered bodies. The lost minor planets appear first, since the table is sorted by the body's first observation date.</span> </li> <li id="cite_note-1982-x-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-1982-x_9-0">^</a></b></span> <span class="reference-text">On 18 March 1892, a body discovered by Max Wolf with the provisional designation 1892 X was originally named 330 Adalberta, but was lost and never recovered. In 1982, it was determined that Wolf erroneously measured two images of stars, not asteroids. Because it was a false positive and the body never existed, the named designation <a href="/wiki/330_Adalberta" title="330 Adalberta">330 Adalberta</a> was reused for another asteroid, A910 CB, discovered in 1910.</span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="References">References</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=8" title="Edit section: References"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <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-MPC-Running-Tallies-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-MPC-Running-Tallies_1-0">^</a></b></span> <span class="reference-text"><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 class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.minorplanetcenter.net/">"Running Tallies – Minor Planets Discovered"</a>. <i>IAU Minor Planet Center</i><span class="reference-accessdate">. Retrieved <span class="nowrap">19 August</span> 2015</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=IAU+Minor+Planet+Center&rft.atitle=Running+Tallies+%E2%80%93+Minor+Planets+Discovered&rft_id=http%3A%2F%2Fwww.minorplanetcenter.net%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALost+minor+planet" class="Z3988"></span></span> </li> <li id="cite_note-blair-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-blair_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-blair_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-blair_2-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBlair2002" class="citation book cs1">Blair, Edward C. (2002). <a rel="nofollow" class="external text" href="https://books.google.com/books?id=oa289IxCvAAC&pg=PA177"><i><span></span><b>Asteroids: overview, abstracts, and bibliography</b> (2002), by Edward C. Blair, Page 177</i></a>. Nova Publishers. <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/9781590334829" title="Special:BookSources/9781590334829"><bdi>9781590334829</bdi></a><span class="reference-accessdate">. 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Retrieved 27 February 2009, from Encyclopædia Britannica Online: <a rel="nofollow" class="external free" href="http://www.britannica.com/topic/lost-asteroid">http://www.britannica.com/topic/lost-asteroid</a></span> </li> <li id="cite_note-MPC-NEA-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-MPC-NEA_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://www.minorplanetcenter.net/iau/MPCORB/NEA.txt">"Orbits for Near Earth Asteroids (NEAs)"</a>. <i>IAU Minor Planet Center</i>. International Astronomical Union<span class="reference-accessdate">. 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Retrieved <span class="nowrap">9 January</span> 2008</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=2007+WD5+Mars+Collision+Effectively+Ruled+Out+%E2%80%93+Impact+Odds+now+1+in+10%2C000&rft.pub=NASA%2FJPL+Near-Earth+Object+Program+Office&rft.date=2008-01-09&rft.au=Steve+Chesley%2C+Paul+Chodas+and+Don+Yeomans&rft_id=http%3A%2F%2Fneo.jpl.nasa.gov%2Fnews%2Fnews156.html&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALost+minor+planet" class="Z3988"></span></span> </li> <li id="cite_note-planetaryorgblog-35"><span class="mw-cite-backlink"><b><a href="#cite_ref-planetaryorgblog_35-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFLakdawalla2008" class="citation web cs1">Lakdawalla, Emily (4 February 2008). <a rel="nofollow" class="external text" href="http://www.planetary.org/blog/article/00001316/">"WD5 most likely missed Mars, but we may never know"</a><span class="reference-accessdate">. Retrieved <span class="nowrap">24 February</span> 2008</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=WD5+most+likely+missed+Mars%2C+but+we+may+never+know&rft.date=2008-02-04&rft.aulast=Lakdawalla&rft.aufirst=Emily&rft_id=http%3A%2F%2Fwww.planetary.org%2Fblog%2Farticle%2F00001316%2F&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALost+minor+planet" class="Z3988"></span></span> </li> <li id="cite_note-Horizons1223-36"><span class="mw-cite-backlink"><b><a href="#cite_ref-Horizons1223_36-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://archive.today/20070813191113/http://home.comcast.net/~kpheider/2007WD5.txt">"Horizons Archive Mars/Earth 2003/2008"</a>. Archived from <a rel="nofollow" class="external text" href="http://home.comcast.net/~kpheider/2007WD5.txt">the original</a> on 13 August 2007<span class="reference-accessdate">. Retrieved <span class="nowrap">23 December</span> 2007</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Horizons+Archive+Mars%2FEarth+2003%2F2008&rft_id=http%3A%2F%2Fhome.comcast.net%2F~kpheider%2F2007WD5.txt&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALost+minor+planet" class="Z3988"></span> (Soln.date: 2007-Dec-23)</span> </li> <li id="cite_note-37"><span class="mw-cite-backlink"><b><a href="#cite_ref-37">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010AU118">"JPL Small-Body Database Browser: (2010 AU118)"</a> (last observation: 2010-01-15; <a href="/wiki/Observation_arc" title="Observation arc">arc</a>: 2 days). <a href="/wiki/Jet_Propulsion_Laboratory" title="Jet Propulsion Laboratory">Jet Propulsion Laboratory</a>. <a rel="nofollow" class="external text" href="https://archive.today/20121213124020/http://ssd.jpl.nasa.gov/sbdb.cgi?sstr=2010AU118">Archived</a> from the original on 13 December 2012<span class="reference-accessdate">. Retrieved <span class="nowrap">13 May</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=JPL+Small-Body+Database+Browser%3A+%282010+AU118%29&rft.pub=Jet+Propulsion+Laboratory&rft_id=http%3A%2F%2Fssd.jpl.nasa.gov%2Fsbdb.cgi%3Fsstr%3D2010AU118&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALost+minor+planet" class="Z3988"></span></span> </li> <li id="cite_note-summary-38"><span class="mw-cite-backlink"><b><a href="#cite_ref-summary_38-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20140403145151/http://neo.jpl.nasa.gov/risk/2010au118.html">"Earth Impact Risk Summary: 2010 AU118"</a>. NASA/JPL Near-Earth Object Program Office. Archived from <a rel="nofollow" class="external text" href="https://cneos.jpl.nasa.gov/sentry/details.html#?des=2010%20AU118">the original</a> on 3 April 2014<span class="reference-accessdate">. Retrieved <span class="nowrap">13 May</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Earth+Impact+Risk+Summary%3A+2010+AU118&rft.pub=NASA%2FJPL+Near-Earth+Object+Program+Office&rft_id=https%3A%2F%2Fcneos.jpl.nasa.gov%2Fsentry%2Fdetails.html%23%3Fdes%3D2010%2520AU118&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALost+minor+planet" class="Z3988"></span></span> </li> <li id="cite_note-NEODyS2020-39"><span class="mw-cite-backlink"><b><a href="#cite_ref-NEODyS2020_39-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://newton.spacedys.com/neodys/index.php?pc=1.1.3.1&n=2010AU118&oc=500&y0=2020&m0=10&d0=15&h0=0&mi0=0&y1=2020&m1=10&d1=25&h1=0&mi1=0&ti=1.0&tiu=days">"2010AU118 Ephemerides for 20 October 2020"</a>. <a href="/wiki/NEODyS" title="NEODyS">NEODyS</a> (Near Earth Objects –  Dynamic Site)<span class="reference-accessdate">. Retrieved <span class="nowrap">13 May</span> 2020</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=2010AU118+Ephemerides+for+20+October+2020&rft.pub=NEODyS+%28Near+Earth+Objects+%26ndash%3B%26%2332%3B+Dynamic+Site%29&rft_id=http%3A%2F%2Fnewton.spacedys.com%2Fneodys%2Findex.php%3Fpc%3D1.1.3.1%26n%3D2010AU118%26oc%3D500%26y0%3D2020%26m0%3D10%26d0%3D15%26h0%3D0%26mi0%3D0%26y1%3D2020%26m1%3D10%26d1%3D25%26h1%3D0%26mi1%3D0%26ti%3D1.0%26tiu%3Ddays&rfr_id=info%3Asid%2Fen.wikipedia.org%3ALost+minor+planet" class="Z3988"></span></span> </li> </ol></div> <div class="mw-heading mw-heading2"><h2 id="External_links">External links</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Lost_minor_planet&action=edit&section=9" title="Edit section: External links"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" 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characteristics</a> <ul><li><a href="/wiki/Dynamic_method" title="Dynamic method">dynamic method</a></li></ul></li> <li><a href="/wiki/Asteroid_impact_avoidance" title="Asteroid impact avoidance">Impact avoidance</a></li> <li><a href="/wiki/Near-Earth_Asteroid_Tracking" title="Near-Earth Asteroid Tracking">Tracking</a></li> <li><a href="/wiki/Gravitational_keyhole" title="Gravitational keyhole">Gravitational keyhole</a></li> <li><a href="/wiki/List_of_Earth-crossing_minor_planets" class="mw-redirect" title="List of Earth-crossing minor planets">Earth-crosser</a></li> <li><a href="/wiki/List_of_asteroid_close_approaches_to_Earth" title="List of asteroid close approaches to Earth">Close approaches</a></li> <li><a href="/wiki/Binary_asteroid" title="Binary asteroid">Binary</a> <ul><li><a href="/wiki/Minor-planet_moon" title="Minor-planet moon">moon</a></li> <li><a href="/wiki/Contact_binary_(small_Solar_System_body)" title="Contact binary (small Solar System body)">contact</a></li></ul></li> <li><a href="/wiki/Active_asteroid" title="Active asteroid">Active</a></li> <li><a href="/wiki/Asteroid_pair" title="Asteroid pair">Asteroid pair</a></li> <li><a href="/wiki/Palomar%E2%80%93Leiden_survey" title="Palomar–Leiden survey">Palomar–Leiden survey</a></li> <li><a href="/wiki/Contact_binary_(small_Solar_System_body)" title="Contact binary (small Solar System body)">Contact binary</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Asteroid#Distribution_within_the_Solar_System" title="Asteroid">Distribution</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="/wiki/Trojan_(celestial_body)" title="Trojan (celestial body)">Trojans</a> <ul><li><a href="/wiki/2013_ND15" title="2013 ND15">Venus trojan</a></li> <li><a href="/wiki/Earth_trojan" title="Earth trojan">Earth trojans</a></li> <li><a href="/wiki/Mars_trojan" title="Mars trojan">Mars trojans</a></li> <li><a href="/wiki/Jupiter_trojan" title="Jupiter trojan">Jupiter trojans</a></li> <li><a href="/wiki/Uranus_trojan" class="mw-redirect" title="Uranus trojan">Uranus trojans</a></li> <li><a href="/wiki/Neptune_trojan" title="Neptune trojan">Neptune trojans</a></li></ul></li> <li>Interior to Earth <ul><li><a href="/wiki/Vulcanoid" title="Vulcanoid">Vulcanoids</a></li> <li><a href="/wiki/List_of_Mercury-crossing_minor_planets" title="List of Mercury-crossing minor planets">Mercury-crossers</a></li> <li><a href="/wiki/List_of_Venus-crossing_minor_planets" title="List of Venus-crossing minor planets">Venus-crossers</a></li></ul></li> <li><a href="/wiki/Near-Earth_object" title="Near-Earth object">Near-Earth</a> <ul><li><a href="/wiki/Aten_asteroid" title="Aten asteroid">Aten</a></li> <li><a href="/wiki/Amor_asteroid" title="Amor asteroid">Amor</a></li> <li><a href="/wiki/Apollo_asteroid" title="Apollo asteroid">Apollo</a></li> <li><a href="/wiki/Atira_asteroid" title="Atira asteroid">Atira</a></li> <li><a href="/wiki/List_of_Earth-crossing_minor_planets" class="mw-redirect" title="List of Earth-crossing minor planets">Earth-crossers</a></li></ul></li> <li>Between Earth and the main belt <ul><li><a href="/wiki/List_of_Mars-crossing_minor_planets" title="List of Mars-crossing minor planets">Mars crossers</a></li></ul></li> <li><a href="/wiki/Asteroid_belt" title="Asteroid belt">Asteroid belt</a> <ul><li><a href="/wiki/Kirkwood_gap" title="Kirkwood gap">Kirkwood gap</a></li> <li><a href="/wiki/Active_asteroid" title="Active asteroid">Active asteroids</a></li></ul></li> <li>Outer Solar System, does not include <a href="/wiki/Distant_minor_planet" title="Distant minor planet">distant minor planets</a> <ul><li><a href="/wiki/List_of_Jupiter-crossing_minor_planets" title="List of Jupiter-crossing minor planets">Jupiter-crossers</a></li> <li><a href="/wiki/List_of_Saturn-crossing_minor_planets" title="List of Saturn-crossing minor planets">Saturn-crossers</a></li> <li><a href="/wiki/List_of_Uranus-crossing_minor_planets" title="List of Uranus-crossing minor planets">Uranus-crossers</a></li> <li><a href="/wiki/List_of_Neptune-crossing_minor_planets" title="List of Neptune-crossing minor planets">Neptune-crossers</a></li></ul></li> <li><a href="/wiki/Centaur_(small_Solar_System_body)" title="Centaur (small Solar System body)">Centaurs</a></li> <li><a href="/wiki/Exoasteroid" title="Exoasteroid">Exoasteroids</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Asteroid#Classification" title="Asteroid">Classification</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%"><a href="/wiki/Asteroid#Orbital_classification" title="Asteroid">Orbital</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="/wiki/List_of_minor-planet_groups" title="List of minor-planet groups">Group</a></li> <li><a href="/wiki/Asteroid_family" title="Asteroid family">Family</a></li> <li><i><a href="/wiki/Category:Asteroid_groups_and_families" title="Category:Asteroid groups and families">(list)</a></i></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Asteroid_spectral_types" title="Asteroid spectral types">Spectral</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%"><a href="/wiki/Asteroid_spectral_types#Tholen_classification" title="Asteroid spectral types">Tholen</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="/wiki/C-type_asteroid#C-group_(Tholen)" title="C-type asteroid">C-group</a> <ul><li><a href="/wiki/B-type_asteroid" title="B-type asteroid">B-type</a></li> <li><a href="/wiki/F-type_asteroid" title="F-type asteroid">F-type</a></li> <li><a href="/wiki/G-type_asteroid" title="G-type asteroid">G-type</a></li> <li><a href="/wiki/C-type_asteroid" title="C-type asteroid">C-type</a></li></ul></li> <li><a href="/wiki/S-type_asteroid" title="S-type asteroid">S-type</a></li> <li><a href="/wiki/X-type_asteroid" title="X-type asteroid">X-group</a> <ul><li><a href="/wiki/M-type_asteroid" title="M-type asteroid">M-type</a></li> <li><a href="/wiki/E-type_asteroid" title="E-type asteroid">E-type</a></li> <li><a href="/wiki/P-type_asteroid" title="P-type asteroid">P-type</a></li></ul></li></ul> <ul><li><i>small classes</i> <ul><li><a href="/wiki/A-type_asteroid" title="A-type asteroid">A-type</a></li> <li><a href="/wiki/D-type_asteroid" title="D-type asteroid">D-type</a></li> <li><a href="/wiki/J-type_asteroid" title="J-type asteroid">J-type</a></li> <li><a href="/wiki/T-type_asteroid" title="T-type asteroid">T-type</a></li> <li><a href="/wiki/Q-type_asteroid" title="Q-type asteroid">Q-type</a></li> <li><a href="/wiki/R-type_asteroid" title="R-type asteroid">R-type</a></li> <li><a href="/wiki/V-type_asteroid" title="V-type asteroid">V-type</a></li></ul></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Asteroid_spectral_types#SMASS_classification" title="Asteroid spectral types">SMASS</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="/wiki/C-type_asteroid#C-group_(SMASS)" title="C-type asteroid">C-group</a> <ul><li><a href="/wiki/B-type_asteroid" title="B-type asteroid">B-type</a></li> <li><a href="/wiki/C-type_asteroid" title="C-type asteroid">C-type</a></li> <li>Cg</li> <li>Ch</li> <li>Cgh</li> <li>Cb</li></ul></li> <li><a href="/wiki/S-type_asteroid" title="S-type asteroid">S-group</a> <ul><li><a href="/wiki/A-type_asteroid" title="A-type asteroid">A-type</a></li> <li><a href="/wiki/Q-type_asteroid" title="Q-type asteroid">Q-type</a></li> <li><a href="/wiki/R-type_asteroid" title="R-type asteroid">R-type</a></li> <li><a href="/wiki/K-type_asteroid" title="K-type asteroid">K-type</a></li> <li><a href="/wiki/L-type_asteroid" title="L-type asteroid">L-type</a></li> <li><a href="/wiki/S-type_asteroid" title="S-type asteroid">S-type</a></li> <li>Sa</li> <li>Sq</li> <li>Sr</li> <li>Sk</li> <li>Sl</li></ul></li></ul> <ul><li><a href="/wiki/X-type_asteroid" title="X-type asteroid">X-group</a> <ul><li><a href="/wiki/X-type_asteroid" title="X-type asteroid">X-type</a></li> <li>Xe</li> <li>Xc</li> <li>Xk</li></ul></li> <li><i>small types</i> <ul><li><a href="/wiki/T-type_asteroid" title="T-type asteroid">T-type</a></li> <li><a href="/wiki/D-type_asteroid" title="D-type asteroid">D-type</a></li> <li><a href="/wiki/L-type_asteroid#Ld-type_asteroids" title="L-type asteroid">Ld-type</a></li> <li><a href="/wiki/O-type_asteroid" title="O-type asteroid">O-type</a></li> <li><a href="/wiki/V-type_asteroid" title="V-type asteroid">V-type</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Asteroid#Exploration" title="Asteroid">Exploration</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="/wiki/List_of_minor_planets_and_comets_visited_by_spacecraft" title="List of minor planets and comets visited by spacecraft">Asteroids visited by spacecraft</a></li> <li><a href="/wiki/Asteroid_mining" title="Asteroid mining">Mining</a></li> <li><a href="/wiki/Asteroid_capture" title="Asteroid capture">Capture</a></li> <li><a href="/wiki/Colonization_of_the_asteroids" class="mw-redirect" title="Colonization of the asteroids">Colonization</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Category:Lists_of_asteroids" title="Category:Lists of asteroids">Lists</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="/wiki/List_of_near-Earth_asteroids_by_distance_from_Sun" title="List of near-Earth asteroids by distance from Sun">Near-Earth</a></li> <li><a href="/wiki/List_of_minor_planets" title="List of minor planets">Minor planets</a></li> <li><a class="mw-selflink selflink">Lost</a></li> <li><a href="/wiki/List_of_asteroid-discovering_observatories" title="List of asteroid-discovering observatories">Discovering observatories</a></li> <li><a href="/wiki/List_of_missions_to_minor_planets" title="List of missions to minor planets">Space missions</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Related</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="/wiki/Asteroid_Day" title="Asteroid Day">Asteroid Day</a></li> <li><a href="/wiki/Asteroids_in_fiction" title="Asteroids in fiction">Asteroids in fiction</a></li> <li><a href="/wiki/List_of_asteroids_in_astrology" class="mw-redirect" title="List of asteroids in astrology">Asteroids in astrology</a> <ul><li><a href="/wiki/Occultation#Occultations_by_smaller_bodies" title="Occultation">occultation</a></li></ul></li></ul> </div></td></tr><tr><td class="navbox-abovebelow hlist" colspan="2"><div> <ul><li><a href="/wiki/Comet" title="Comet">Comet</a></li> <li><a href="/wiki/Minor_planet" title="Minor planet">Minor planet</a></li></ul> <ul><li><span class="noviewer" typeof="mw:File"><span title="Category"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/16px-Symbol_category_class.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/23px-Symbol_category_class.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/31px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></span></span> <a href="/wiki/Category:Asteroids" title="Category:Asteroids">Category</a></li></ul> </div></td></tr></tbody></table></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"></div><div role="navigation" class="navbox" aria-labelledby="Small_Solar_System_bodies" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239400231"><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Small_Solar_System_bodies" title="Template:Small Solar System bodies"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Small_Solar_System_bodies" title="Template talk:Small Solar System bodies"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Small_Solar_System_bodies" title="Special:EditPage/Template:Small Solar System bodies"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Small_Solar_System_bodies" style="font-size:114%;margin:0 4em"><a href="/wiki/Small_Solar_System_body" title="Small Solar System body">Small Solar System bodies</a></div></th></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Minor_planet" title="Minor planet">Minor planets</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><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Minor-planet_designation" title="Minor-planet designation">Designation</a></li> <li><a href="/wiki/List_of_minor-planet_groups" title="List of minor-planet groups">Groups</a></li> <li><a href="/wiki/List_of_minor_planets" title="List of minor planets">List</a></li> <li><a href="/wiki/Minor-planet_moon" title="Minor-planet moon">Moon</a></li> <li><a href="/wiki/Meanings_of_minor-planet_names" title="Meanings of minor-planet names">Meanings of names</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Asteroid" title="Asteroid">Asteroid</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Active_asteroid" title="Active asteroid">Active</a></li> <li><a href="/wiki/Aten_asteroid" title="Aten asteroid">Aten asteroid</a></li> <li><a href="/wiki/Asteroid_belt" title="Asteroid belt">Asteroid belt</a></li> <li><a href="/wiki/Asteroid_family" title="Asteroid family">Family</a></li> <li><a href="/wiki/Jupiter_trojan" title="Jupiter trojan">Jupiter trojan</a></li> <li><a href="/wiki/Near-Earth_object" title="Near-Earth object">Near-Earth</a></li> <li><a href="/wiki/Asteroid_spectral_types" title="Asteroid spectral types">Spectral types</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Distant_minor_planet" title="Distant minor planet">Distant minor planet</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><ul><li><a href="/wiki/Centaur_(small_Solar_System_body)" title="Centaur (small Solar System body)">Centaur</a></li> <li><a href="/wiki/Neptune_trojan" title="Neptune trojan">Neptune trojan</a></li></ul></li> <li><a href="/wiki/Damocloid" title="Damocloid">Damocloid</a></li> <li><a href="/wiki/Trans-Neptunian_object" title="Trans-Neptunian object">Trans-Neptunian object</a> <ul><li><a href="/wiki/Detached_object" title="Detached object">Detached</a></li> <li><a href="/wiki/Kuiper_belt" title="Kuiper belt">Kuiper belt</a></li> <li><a href="/wiki/Oort_cloud" title="Oort cloud">Oort cloud</a></li> <li><a href="/wiki/Scattered_disc" title="Scattered disc">Scattered disc</a></li></ul></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Comet" title="Comet">Comets</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="/wiki/Extinct_comet" title="Extinct comet">Extinct</a></li> <li><a href="/wiki/Great_comet" title="Great comet">Great</a></li> <li><a href="/wiki/List_of_Halley-type_comets" title="List of Halley-type comets">Halley-type</a></li> <li><a href="/wiki/List_of_hyperbolic_comets" title="List of hyperbolic comets">Hyperbolic</a></li> <li><a href="/wiki/List_of_long-period_comets" title="List of long-period comets">Long-period</a></li> <li><a href="/wiki/Lost_comet" title="Lost comet">Lost</a></li> <li><a href="/wiki/List_of_near-parabolic_comets" title="List of near-parabolic comets">Near-parabolic</a></li> <li><a href="/wiki/List_of_periodic_comets" title="List of periodic comets">Periodic</a></li> <li><a href="/wiki/Sungrazing_comet" title="Sungrazing comet">Sungrazing</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Other</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="/wiki/Cosmic_dust" title="Cosmic dust">Cosmic dust</a></li> <li><a href="/wiki/Meteoroid" title="Meteoroid">Meteoroids</a></li> <li><a href="/wiki/Space_debris" title="Space debris">Space debris</a></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1&useformat=desktop" 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=Lost_minor_planet&oldid=1241846269">https://en.wikipedia.org/w/index.php?title=Lost_minor_planet&oldid=1241846269</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a 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