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<h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Swift J1644+57</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet 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. 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system">Coordinates</a>: <span typeof="mw:File"><span title="Sky map"><img alt="Sky map" src="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Jupiter_and_moon.png/20px-Jupiter_and_moon.png" decoding="async" width="20" height="20" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Jupiter_and_moon.png/30px-Jupiter_and_moon.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/e/e4/Jupiter_and_moon.png/40px-Jupiter_and_moon.png 2x" data-file-width="128" data-file-height="128" /></span></span> <a rel="nofollow" class="external text" href="http://www.wikisky.org/?ra=16.747213888889&de=57.58325&zoom=11&show_grid=1&show_constellation_lines=1&show_constellation_boundaries=1&show_const_names=1&show_galaxies=1&img_source=IMG_all">16<sup>h</sup> 44<sup>m</sup> 49.97<sup>s</sup>, +57° 34′ 59.7″</a></span></div></div> </div> <div id="siteSub" class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Tidal disruption event in the constellation Draco</div> <style data-mw-deduplicate="TemplateStyles:r1257001546">.mw-parser-output .infobox-subbox{padding:0;border:none;margin:-3px;width:auto;min-width:100%;font-size:100%;clear:none;float:none;background-color:transparent}.mw-parser-output .infobox-3cols-child{margin:auto}.mw-parser-output .infobox .navbar{font-size:100%}@media screen{html.skin-theme-clientpref-night .mw-parser-output .infobox-full-data:not(.notheme)>div:not(.notheme)[style]{background:#1f1f23!important;color:#f8f9fa}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .infobox-full-data:not(.notheme) div:not(.notheme){background:#1f1f23!important;color:#f8f9fa}}@media(min-width:640px){body.skin--responsive .mw-parser-output .infobox-table{display:table!important}body.skin--responsive .mw-parser-output .infobox-table>caption{display:table-caption!important}body.skin--responsive .mw-parser-output .infobox-table>tbody{display:table-row-group}body.skin--responsive .mw-parser-output .infobox-table tr{display:table-row!important}body.skin--responsive .mw-parser-output .infobox-table th,body.skin--responsive .mw-parser-output .infobox-table td{padding-left:inherit;padding-right:inherit}}</style><table class="infobox"><caption class="infobox-title">GRB 110328A</caption><tbody><tr><td colspan="2" class="infobox-image"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/File:GRB_110328A_(captured_by_the_Hubble_Space_Telescope).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/6/6c/GRB_110328A_%28captured_by_the_Hubble_Space_Telescope%29.jpg/290px-GRB_110328A_%28captured_by_the_Hubble_Space_Telescope%29.jpg" decoding="async" width="290" height="218" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/6/6c/GRB_110328A_%28captured_by_the_Hubble_Space_Telescope%29.jpg/435px-GRB_110328A_%28captured_by_the_Hubble_Space_Telescope%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/6/6c/GRB_110328A_%28captured_by_the_Hubble_Space_Telescope%29.jpg/580px-GRB_110328A_%28captured_by_the_Hubble_Space_Telescope%29.jpg 2x" data-file-width="1200" data-file-height="900" /></a></span><div class="infobox-caption">Swift J1644+57 imaged by <a href="/wiki/Hubble_Space_Telescope" title="Hubble Space Telescope">Hubble Space Telescope</a>.</div></td></tr><tr><th scope="row" class="infobox-label">Event type</th><td class="infobox-data"><a href="/wiki/Gamma-ray_burst" title="Gamma-ray burst">Gamma-ray burst</a> <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q584584?uselang=en#P31" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label">Duration</th><td class="infobox-data">years</td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Constellation" title="Constellation">Constellation</a></th><td class="infobox-data"><a href="/wiki/Draco_(constellation)" title="Draco (constellation)">Draco</a> <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q584584?uselang=en#P59" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Right_ascension" title="Right ascension">Right ascension</a></th><td class="infobox-data"><span class="nowrap">16<sup>h</sup> 44<sup>m</sup> 49.97<sup>s</sup></span></td></tr><tr><th scope="row" class="infobox-label"><a href="/wiki/Declination" title="Declination">Declination</a></th><td class="infobox-data">+57° 34′ 59.7″<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></td></tr><tr><th scope="row" class="infobox-label">Distance</th><td class="infobox-data">3,800,000,000 ly (1.2<span style="margin:0 .15em 0 .25em">×</span>10<sup>9</sup> pc)</td></tr><tr><th scope="row" class="infobox-label">Total energy output</th><td class="infobox-data">5<span style="margin:0 .15em 0 .25em">×</span>10<sup><span class="nowrap"><span data-sort-value="7001480000000000000♠"></span>48</span></sup> <a href="/wiki/Erg" title="Erg">ergs</a> (assuming beamed emission)</td></tr><tr><th scope="row" class="infobox-label">Other designations</th><td class="infobox-data">GRB 110328A, Swift J164449.3+573451, 2MAXI J1645+576</td></tr><tr><td colspan="2" class="infobox-full-data"> <span class="noviewer" typeof="mw:File"><a href="/wiki/File:Commons-logo.svg" class="mw-file-description"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></a></span> <a href="https://commons.wikimedia.org/wiki/Category:Swift_J1644%2B57" class="extiw" title="commons:Category:Swift J1644+57">Related media on Commons</a></td></tr><tr><td colspan="2" class="infobox-below"><div class="metadata" style="text-align: right;">[<a href="https://www.wikidata.org/wiki/Q584584" class="extiw" title="d:Q584584">edit on Wikidata</a>]</div></td></tr></tbody></table> <p><b>Swift J164449.3+573451</b>, initially referred to as <b>GRB 110328A</b>, and sometimes abbreviated to <b>Sw J1644+57</b>, was a <a href="/wiki/Tidal_disruption_event" title="Tidal disruption event">tidal disruption event</a> (TDE), the destruction of a star by a <a href="/wiki/Supermassive_black_hole" title="Supermassive black hole">supermassive black hole</a>. It was first detected by the <a href="/wiki/Swift_Gamma-Ray_Burst_Mission" class="mw-redirect" title="Swift Gamma-Ray Burst Mission">Swift Gamma-Ray Burst Mission</a> on March 28, 2011.<sup id="cite_ref-Joshua_S._Bloom_et_al_2-0" class="reference"><a href="#cite_note-Joshua_S._Bloom_et_al-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The event occurred in the center of a small galaxy<sup class="noprint Inline-Template" style="white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Avoid_weasel_words" class="mw-redirect" title="Wikipedia:Avoid weasel words"><span title="The material near this tag possibly uses too vague attribution or weasel words. (August 2024)">which?</span></a></i>]</sup> in the <a href="/wiki/Draco_constellation" class="mw-redirect" title="Draco constellation">Draco constellation</a>, about 3.8 billion light-years away. It was the first confirmed jetted tidal disruption event and is the most luminous and energetic TDE recorded.<sup id="cite_ref-3" class="reference"><a href="#cite_note-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="Relativistic_jet">Relativistic jet</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Swift_J1644%2B57&action=edit&section=1" title="Edit section: Relativistic jet"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Swift J1644+57 occurred when a star wandered too close to the central supermassive black hole in the galaxy, and was gravitationally torn apart, forming an <a href="/wiki/Accretion_disk" title="Accretion disk">accretion disk</a> from stellar material.<sup id="cite_ref-Joshua_S._Bloom_et_al_2-1" class="reference"><a href="#cite_note-Joshua_S._Bloom_et_al-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup><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><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-bloom_6-0" class="reference"><a href="#cite_note-bloom-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> When this occurred, an <a href="/wiki/Astrophysical_jet" title="Astrophysical jet">astrophysical jet</a> was launched with material traveling at relativistic speeds, near the <a href="/wiki/Speed_of_light" title="Speed of light">speed of light</a>. The beam of radiation from one of these jets pointed directly toward Earth, <a href="/wiki/Relativistic_beaming" title="Relativistic beaming">enhancing</a> the apparent brightness. </p><p>Swift J1644+57 was observed by many telescopes across the <a href="/wiki/Electromagnetic_spectrum" title="Electromagnetic spectrum">electromagnetic spectrum</a>. <a href="/wiki/Gamma-ray" class="mw-redirect" title="Gamma-ray">γ-</a> and <a href="/wiki/X-ray" title="X-ray">X-rays</a> were detected due to jet plasma physics from the relativistic jet, with repetitive dimming and softening of the X-rays due to <a href="/wiki/Precession" title="Precession">precession</a> within the warped disk.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> The jets drive <a href="/wiki/Shock_wave" title="Shock wave">shocks</a> into the surrounding interstellar medium, resulting in a <a href="/wiki/Radio_waves" class="mw-redirect" title="Radio waves">radio</a> to <a href="/wiki/Infrared" title="Infrared">infrared</a> afterglow. Observed <a href="/wiki/Linear_polarization" title="Linear polarization">linear polarization</a> of the infrared radiation was consistent with <a href="/wiki/Synchrotron_radiation" title="Synchrotron radiation">synchrotron emission</a> from the afterglow shock.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>Continuous monitoring at radio and X-ray wavelengths indicated that after roughly 600 days (1.5 years), the relativistic jet shut off.<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> This time likely corresponds with when the mass accretion from the stellar debris passed under the <a href="/wiki/Eddington_rate" class="mw-redirect" title="Eddington rate">Eddington rate</a>, at which point the jet was no longer fueled.<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> </p><p>Since then, the outflow has become non-relativistic in speed,<sup id="cite_ref-11" class="reference"><a href="#cite_note-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> and emission is consistent with that of a <a href="/wiki/Shock_wave" title="Shock wave">shock wave</a> that continues to expand into the surrounding material. As of 2021, the event is no longer detectable in X-rays but is still radio bright, and it is anticipated radio emission from Swift J1644+57 will be observable for several decades as emission continues to slowly fade.<sup id="cite_ref-Cendes21_12-0" class="reference"><a href="#cite_note-Cendes21-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Host_galaxy_and_progenitor">Host galaxy and progenitor</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Swift_J1644%2B57&action=edit&section=2" title="Edit section: Host galaxy and progenitor"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Detection of the relativistically expanding afterglow confirmed the identity of the host galaxy.<sup id="cite_ref-13" class="reference"><a href="#cite_note-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> Optical emission lines imply that the host is not an <a href="/wiki/Active_galactic_nucleus" title="Active galactic nucleus">active galactic nucleus</a> (AGN), but a <a href="/wiki/Starburst_galaxy" title="Starburst galaxy">starburst galaxy</a> of <a href="/wiki/HII_galaxy" title="HII galaxy">HII galaxy</a> classification.<sup id="cite_ref-14" class="reference"><a href="#cite_note-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> The supermassive black hole at the center of the galaxy is estimated to be > 7 × 10<sup>6</sup> M<sub>sun</sub>.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p><p>Timing considerations suggest that the tidally disrupted star was possibly a <a href="/wiki/White_dwarf" title="White dwarf">white dwarf</a> and not a regular <a href="/wiki/Main_sequence" title="Main sequence">main sequence</a> star.<sup id="cite_ref-16" class="reference"><a href="#cite_note-16"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> When the relativistic jet turned off, given the mass of <sup class="noprint Inline-Template" style="margin-left:0.1em; white-space:nowrap;">[<i><a href="/wiki/Wikipedia:Please_clarify" title="Wikipedia:Please clarify"><span title="The text near this tag may need clarification or removal of jargon. (November 2024)">clarification needed</span></a></i>]</sup> astronomers calculated the amount of mass needed to fuel the jet for the Swift J1644+57 black hole as ~0.15 M<sub>sun</sub>, which is consistent with a solar mass star.<sup id="cite_ref-17" class="reference"><a href="#cite_note-17"><span class="cite-bracket">[</span>17<span class="cite-bracket">]</span></a></sup> </p> <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=Swift_J1644%2B57&action=edit&section=3" title="Edit section: See also"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/Supermassive_black_hole" title="Supermassive black hole">Supermassive black hole</a></li> <li><a href="/wiki/Tidal_force" title="Tidal force">Tidal force</a></li></ul> <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=Swift_J1644%2B57&action=edit&section=4" title="Edit section: References"><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"> <div class="mw-references-wrap mw-references-columns"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><b><a href="#cite_ref-1">^</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 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.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 journal cs1"><a rel="nofollow" class="external text" href="http://hubblesite.org/newscenter/archive/releases/2011/10/fastfacts/">"NASA Telescopes Join Forces to Observe Unprecedented Explosion"</a>. <i>Chandra Press Release</i>: 7. 2011. <a 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href="/wiki/Draco_in_Chinese_astronomy" title="Draco in Chinese astronomy">Draco in Chinese astronomy</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:55px"><a href="/wiki/Star" title="Star">Stars</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="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:70px"><a href="/wiki/Bayer_designation" title="Bayer designation">Bayer</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Thuban" title="Thuban">α (Thuban)</a></li> <li><a href="/wiki/Beta_Draconis" title="Beta Draconis">β (Rastaban)</a></li> <li><a href="/wiki/Gamma_Draconis" title="Gamma Draconis">γ (Eltanin)</a></li> <li><a href="/wiki/Delta_Draconis" title="Delta Draconis">δ (Altais)</a></li> <li><a href="/wiki/Epsilon_Draconis" title="Epsilon Draconis">ε <i>(Tyl)</i></a></li> <li><a href="/wiki/Zeta_Draconis" title="Zeta Draconis">ζ (Aldhibah)</a></li> <li><a href="/wiki/Eta_Draconis" title="Eta Draconis">η (Athebyne)</a></li> <li><a href="/wiki/Theta_Draconis" title="Theta Draconis">θ</a></li> <li><a href="/wiki/Iota_Draconis" title="Iota Draconis">ι (Edasich)</a></li> <li><a href="/wiki/Kappa_Draconis" title="Kappa Draconis">κ</a></li> <li><a href="/wiki/Lambda_Draconis" title="Lambda Draconis">λ (Giausar)</a></li> <li><a href="/wiki/Mu_Draconis" title="Mu Draconis">μ (Alrakis)</a></li> <li><a href="/wiki/Nu_Draconis" title="Nu Draconis">ν <i>(Kuma)</i></a></li> <li><a href="/wiki/Xi_Draconis" title="Xi Draconis">ξ (Grumium)</a></li> <li><a href="/wiki/Omicron_Draconis" title="Omicron Draconis">ο</a></li> <li><a href="/wiki/Pi_Draconis" title="Pi Draconis">π</a></li> <li><a href="/wiki/Rho_Draconis" title="Rho Draconis">ρ</a></li> <li><a href="/wiki/Sigma_Draconis" title="Sigma Draconis">σ (Alsafi)</a></li> <li><a href="/wiki/Tau_Draconis" title="Tau Draconis">τ</a></li> <li><a href="/wiki/Upsilon_Draconis" title="Upsilon Draconis">υ</a></li> <li><a href="/wiki/Phi_Draconis" title="Phi Draconis">φ</a></li> <li><a href="/wiki/Chi_Draconis" title="Chi Draconis">χ</a></li> <li><a href="/wiki/Psi1_Draconis" title="Psi1 Draconis">ψ<sup>1</sup> (Dziban)</a></li> <li><a href="/wiki/Psi2_Draconis" title="Psi2 Draconis">ψ<sup>2</sup></a></li> <li><a href="/wiki/Omega_Draconis" title="Omega Draconis">ω</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Flamsteed_designation" title="Flamsteed designation">Flamsteed</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/6_Draconis" title="6 Draconis">6</a></li> <li><a href="/wiki/7_Draconis" title="7 Draconis">7 (Tianyi)</a></li> <li><a href="/wiki/8_Draconis" title="8 Draconis">8 (Taiyi)</a></li> <li><a href="/wiki/10_Draconis" title="10 Draconis">10 (i)</a></li> <li><a href="/wiki/15_Draconis" title="15 Draconis">15 (A)</a></li> <li><a href="/wiki/18_Draconis" title="18 Draconis">18 (g)</a></li> <li><a href="/wiki/19_Draconis" title="19 Draconis">19 (h)</a></li> <li><a href="/wiki/26_Draconis" title="26 Draconis">26</a></li> <li><a href="/wiki/36_Draconis" title="36 Draconis">36</a></li> <li><a href="/wiki/39_Draconis" title="39 Draconis">39 (b)</a></li> <li><a href="/wiki/42_Draconis" title="42 Draconis">42 (Fafnir)</a></li> <li><a href="/wiki/45_Draconis" title="45 Draconis">45 (d)</a></li> <li><a href="/wiki/64_Draconis" title="64 Draconis">64 (e)</a></li> <li><a href="/wiki/68_Draconis" title="68 Draconis">68</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Variable_star_designation" class="mw-redirect" title="Variable star designation">Variable</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HD_139319" title="HD 139319">TW</a></li> <li><a href="/wiki/AG_Draconis" title="AG Draconis">AG</a></li> <li><a href="/wiki/BY_Draconis" title="BY Draconis">BY</a></li> <li><a href="/wiki/CL_Draconis" title="CL Draconis">CL</a></li> <li><a href="/wiki/CM_Draconis" title="CM Draconis">CM</a></li> <li><a href="/wiki/CX_Draconis" title="CX Draconis">CX</a></li> <li><a href="/wiki/DO_Draconis" class="mw-redirect" title="DO Draconis">DO</a></li> <li><a href="/wiki/GSC_03549-02811" title="GSC 03549-02811">V581</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Bright_Star_Catalogue" title="Bright Star Catalogue">HR</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/HD_81817" title="HD 81817">3751</a></li> <li><a href="/wiki/HD_91190" title="HD 91190">4126</a></li> <li><a href="/wiki/HD_113337" title="HD 113337">4934</a></li> <li><a href="/wiki/HD_139357" title="HD 139357">5811</a></li> <li><a href="/wiki/HD_151613" title="HD 151613">6237</a></li> <li><a href="/wiki/Alruba" title="Alruba">6618 (Alruba)</a></li> <li><a href="/wiki/HD_167042" title="HD 167042">6817</a></li> <li><a href="/wiki/HD_175535" title="HD 175535">7137</a></li> <li><a href="/wiki/HD_193664" title="HD 193664">7783</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px"><a href="/wiki/Henry_Draper_Catalogue" title="Henry Draper Catalogue">HD</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/HIP_56948" title="HIP 56948">101364</a></li> <li><a href="/wiki/HD_156279" title="HD 156279">156279</a></li> <li><a href="/wiki/HD_158259" title="HD 158259">158259</a></li> <li><a href="/wiki/HD_176693" title="HD 176693">176693</a></li> <li><a href="/wiki/HD_191939" title="HD 191939">191939</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px">Other</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/2MASS_1237%2B6526" title="2MASS 1237+6526">2MASS 1237+6526</a></li> <li><a href="/wiki/2MASS_J17554042%2B6551277" class="mw-redirect" title="2MASS J17554042+6551277">2MASS J17554042+6551277</a></li> <li><a href="/wiki/G_240-72" title="G 240-72">G 240-72</a></li> <li><a href="/wiki/GD_356" title="GD 356">GD 356</a></li> <li><a href="/wiki/Gliese_420" class="mw-redirect" title="Gliese 420">Gliese 420</a></li> <li><a href="/wiki/Gliese_625" title="Gliese 625">Gliese 625</a></li> <li><a href="/wiki/Gliese_687" title="Gliese 687">Gliese 687</a></li> <li><a href="/wiki/GRW_%2B70_8247" title="GRW +70 8247">GRW +70 8247</a></li> <li><a href="/wiki/Kepler-4" title="Kepler-4">Kepler-4</a></li> <li><a href="/wiki/Kepler-10" title="Kepler-10">Kepler-10</a></li> <li><a href="/wiki/Kepler-12" title="Kepler-12">Kepler-12</a></li> <li><a href="/wiki/Kepler-90" title="Kepler-90">Kepler-90</a></li> <li><a href="/wiki/Kepler-296" title="Kepler-296">Kepler-296</a></li> <li><a href="/wiki/LP_71-82" title="LP 71-82">LP 71-82</a></li> <li><a href="/wiki/Qatar-1" title="Qatar-1">Qatar-1</a></li> <li><a href="/wiki/Struve_2398" title="Struve 2398">Struve 2398</a></li> <li><a href="/wiki/TOI-1136" title="TOI-1136">TOI-1136</a></li> <li><a href="/wiki/WISEPA_J164715.59%2B563208.2" class="mw-redirect" title="WISEPA J164715.59+563208.2">WISE 1647+5632</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Exoplanets" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Exoplanet" title="Exoplanet">Exoplanets</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/42_Draconis_b" title="42 Draconis b">Orbitar</a></li> <li><a href="/wiki/HD_139357_b" title="HD 139357 b">HD 139357 b</a></li> <li><a href="/wiki/HD_167042_b" title="HD 167042 b">HD 167042 b</a></li> <li><a href="/wiki/Iota_Draconis_b" title="Iota Draconis b">Hypatia</a></li> <li><a href="/wiki/Kepler-4b" title="Kepler-4b">Kepler-4b</a></li> <li><a href="/wiki/Kepler-10b" title="Kepler-10b">Kepler-10b</a></li> <li><a href="/wiki/Kepler-10c" title="Kepler-10c">c</a></li> <li><a href="/wiki/Kepler-12b" title="Kepler-12b">Kepler-12b</a></li> <li><a href="/wiki/Kepler-90e" title="Kepler-90e">Kepler-90e</a></li> <li><a href="/wiki/Kepler-90f" title="Kepler-90f">f</a></li> <li><a href="/wiki/Kepler-90g" title="Kepler-90g">g</a></li> <li><a href="/wiki/Kepler-90h" title="Kepler-90h">h</a></li> <li><a href="/wiki/Kepler-90i" title="Kepler-90i">i</a></li> <li><a href="/wiki/TOI-1452_b" title="TOI-1452 b">TOI-1452 b</a></li> <li><a href="/wiki/TrES-2b" title="TrES-2b">TrES-2b</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Star_clusters" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Star_cluster" title="Star cluster">Star clusters</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/LAMOST_1" title="LAMOST 1">LAMOST 1</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Nebulae" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Nebula" title="Nebula">Nebulae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/NGC_6742" title="NGC 6742">Abell 50</a></li> <li><a href="/wiki/Cat%27s_Eye_Nebula" title="Cat's Eye Nebula">Cat's Eye Nebula</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:55px"><a href="/wiki/Galaxy" title="Galaxy">Galaxies</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="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:70px"><a href="/wiki/New_General_Catalogue" title="New General Catalogue">NGC</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/NGC_3147" title="NGC 3147">3147</a></li> <li><a href="/wiki/NGC_4121" title="NGC 4121">4121</a></li> <li><a href="/wiki/NGC_4125" title="NGC 4125">4125</a></li> <li><a href="/wiki/NGC_4236" title="NGC 4236">4236</a></li> <li><a href="/wiki/NGC_4319" title="NGC 4319">4319</a></li> <li><a href="/wiki/NGC_4345" class="mw-redirect" title="NGC 4345">4345</a></li> <li><a href="/wiki/NGC_4513" title="NGC 4513">4513</a></li> <li><a href="/wiki/NGC_4589" title="NGC 4589">4589</a></li> <li><a href="/wiki/NGC_5678" title="NGC 5678">5678</a></li> <li><a href="/wiki/NGC_5777" title="NGC 5777">5777</a></li> <li><a href="/wiki/NGC_5866" title="NGC 5866">5866</a></li> <li><a href="/wiki/NGC_5866B" title="NGC 5866B">5866B</a></li> <li><a href="/wiki/NGC_5879" title="NGC 5879">5879</a></li> <li><a href="/wiki/NGC_5906" class="mw-redirect" title="NGC 5906">5906</a></li> <li><a href="/wiki/NGC_5907" title="NGC 5907">5907</a></li> <li><a href="/wiki/NGC_5949" title="NGC 5949">5949</a></li> <li><a href="/wiki/NGC_5963" title="NGC 5963">5963</a></li> <li><a href="/wiki/NGC_5965" title="NGC 5965">5965</a></li> <li><a href="/wiki/NGC_5982" title="NGC 5982">5982</a></li> <li><a href="/wiki/NGC_5985" title="NGC 5985">5985</a></li> <li><a href="/wiki/NGC_6090" title="NGC 6090">6090</a></li> <li><a href="/wiki/NGC_6248" title="NGC 6248">6248</a></li> <li><a href="/wiki/NGC_6285" title="NGC 6285">6285</a></li> <li><a href="/wiki/NGC_6286" title="NGC 6286">6286</a></li> <li><a href="/wiki/NGC_6338" title="NGC 6338">6338</a></li> <li><a href="/wiki/NGC_6340" title="NGC 6340">6340</a></li> <li><a href="/wiki/NGC_6365" title="NGC 6365">6365</a></li> <li><a href="/wiki/NGC_6373" title="NGC 6373">6373</a></li> <li><a href="/wiki/NGC_6394" title="NGC 6394">6394</a></li> <li><a href="/wiki/NGC_6412" title="NGC 6412">6412</a></li> <li><a href="/wiki/NGC_6503" title="NGC 6503">6503</a></li> <li><a href="/wiki/NGC_6566" title="NGC 6566">6566</a></li> <li><a href="/wiki/NGC_6621" title="NGC 6621">6621</a></li> <li><a href="/wiki/NGC_6622" title="NGC 6622">6622</a></li> <li><a href="/wiki/NGC_6670" title="NGC 6670">6670</a></li> <li><a href="/wiki/NGC_6676" title="NGC 6676">6676</a></li> <li><a href="/wiki/NGC_6786" title="NGC 6786">6786</a></li> <li><a href="/wiki/NGC_6789" title="NGC 6789">6789</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:70px">Other</th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/1ES_1959%2B650" title="1ES 1959+650">1ES 1959+650</a></li> <li><a href="/wiki/3C_249.1" title="3C 249.1">3C 249.1</a></li> <li><a href="/wiki/3C_305" title="3C 305">3C 305</a></li> <li><a href="/wiki/3C_319" title="3C 319">3C 319</a></li> <li><a href="/wiki/3C_371" title="3C 371">3C 371</a></li> <li><a href="/wiki/3C_390.3" title="3C 390.3">3C 390.3</a></li> <li><a href="/wiki/3C_401" title="3C 401">3C 401</a></li> <li><a href="/wiki/4C_%2B72.26" title="4C +72.26">4C +72.26</a></li> <li><a href="/wiki/H1821%2B643" title="H1821+643">H1821+643</a></li> <li><a href="/wiki/HFLS3" title="HFLS3">HFLS3</a></li> <li><a href="/wiki/KKR_25" title="KKR 25">KKR 25</a></li> <li><a href="/wiki/Markarian_876" title="Markarian 876">Markarian 876</a></li> <li><a href="/wiki/PGC_39058" title="PGC 39058">PGC 39058</a></li> <li><a href="/wiki/S5_1803%2B784" title="S5 1803+784">S5 1803+784</a></li> <li><a href="/wiki/S5_2007%2B777" title="S5 2007+777">S5 2007+777</a></li> <li><a href="/wiki/UGC_9391" title="UGC 9391">UGC 9391</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Galaxy_clusters" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Galaxy_cluster" title="Galaxy cluster">Galaxy clusters</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/Abell_2218" title="Abell 2218">Abell 2218</a></li> <li><a href="/wiki/CL1358%2B62" title="CL1358+62">CL1358+62</a></li> <li><a href="/wiki/Draco_Supercluster" title="Draco Supercluster">Draco Supercluster</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td colspan="2" class="navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Astronomical_events" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Transient_astronomical_event" class="mw-redirect" title="Transient astronomical event">Astronomical events</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="padding:0"><div style="padding:0 0.25em"> <ul><li><a class="mw-selflink selflink">Swift J1644+57</a></li> <li><a href="/wiki/SN_2005B" title="SN 2005B">SN 2005B</a></li> <li><a href="/wiki/SN_2016aps" title="SN 2016aps">SN 2016aps</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><td class="navbox-abovebelow" colspan="2" style="text-align: center;"><div><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:Draco_(constellation)" title="Category:Draco (constellation)">Category</a></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="2011_in_space" 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="3"><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:2011_in_space" title="Template:2011 in space"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:2011_in_space" title="Template talk:2011 in space"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:2011_in_space" title="Special:EditPage/Template:2011 in space"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="2011_in_space" style="font-size:114%;margin:0 4em">2011 in space</div></th></tr><tr><td class="navbox-abovebelow" colspan="3"><div><div style="float: right;"><a href="/wiki/Template:2012_in_space" title="Template:2012 in space">2012</a> » </div></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/2011_in_spaceflight" title="2011 in spaceflight">Space probe launches</a> <span typeof="mw:File"><a href="/wiki/Category:Space_probes_launched_in_2011" title="Category:Space probes launched in 2011"><img alt="Space probes launched in 2011" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/15px-Symbol_category_class.svg.png" decoding="async" width="15" height="15" 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/30px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></a></span></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/Juno_(spacecraft)" title="Juno (spacecraft)"><i>Juno</i></a> (Jupiter orbiter; Aug 2011)</li> <li><a href="/wiki/GRAIL" title="GRAIL">GRAIL</a> (mission to the Moon; Sep 2011)</li> <li><a href="/wiki/Yinghuo-1" title="Yinghuo-1">Yinghuo-1</a> (Mars orbiter); Nov 2011)</li> <li><a href="/wiki/Mars_Science_Laboratory" title="Mars Science Laboratory">Mars Science Laboratory</a> / <a href="/wiki/Curiosity_(rover)" title="Curiosity (rover)"><i>Curiosity</i> rover</a> (mission to Mars; Nov 2011)</li> <li><a href="/wiki/Fobos-Grunt" title="Fobos-Grunt">Fobos-Grunt</a> (mission to Mars; Nov 2011)</li></ul> </div></td><td class="noviewer navbox-image" rowspan="7" style="width:1px;padding:0 0 0 2px;padding-left: 0.5em;"><div><span typeof="mw:File"><a href="/wiki/File:Kepler22b-artwork.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Kepler22b-artwork.jpg/150px-Kepler22b-artwork.jpg" decoding="async" width="150" height="113" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Kepler22b-artwork.jpg/225px-Kepler22b-artwork.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/1e/Kepler22b-artwork.jpg/300px-Kepler22b-artwork.jpg 2x" data-file-width="4096" data-file-height="3072" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:Artist%27s_rendering_ULAS_J1120%2B0641.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Artist%27s_rendering_ULAS_J1120%2B0641.jpg/150px-Artist%27s_rendering_ULAS_J1120%2B0641.jpg" decoding="async" width="150" height="89" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/3/38/Artist%27s_rendering_ULAS_J1120%2B0641.jpg/225px-Artist%27s_rendering_ULAS_J1120%2B0641.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/3/38/Artist%27s_rendering_ULAS_J1120%2B0641.jpg/300px-Artist%27s_rendering_ULAS_J1120%2B0641.jpg 2x" data-file-width="4112" data-file-height="2438" /></a></span><br /><span typeof="mw:File"><a href="/wiki/File:Vesta_in_natural_color_(cropped).jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Vesta_in_natural_color_%28cropped%29.jpg/150px-Vesta_in_natural_color_%28cropped%29.jpg" decoding="async" width="150" height="113" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Vesta_in_natural_color_%28cropped%29.jpg/225px-Vesta_in_natural_color_%28cropped%29.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Vesta_in_natural_color_%28cropped%29.jpg/300px-Vesta_in_natural_color_%28cropped%29.jpg 2x" data-file-width="1220" data-file-height="915" /></a></span></div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Selected <a href="/wiki/Near-Earth_object" title="Near-Earth object">NEOs</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_asteroid_close_approaches_to_Earth_in_2011" title="List of asteroid close approaches to Earth in 2011">Asteroid close approaches</a></li> <li><span class="nowrap"><a href="/wiki/(367789)_2011_AG5" title="(367789) 2011 AG5">(367789) 2011 AG<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">5</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/(471240)_2011_BT15" title="(471240) 2011 BT15">(471240) 2011 BT<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">15</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/2011_CQ1" title="2011 CQ1">2011 CQ<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">1</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/2011_ES4" title="2011 ES4">2011 ES<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">4</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/2011_EO40" title="2011 EO40">2011 EO<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">40</span></span></a></span></li> <li><a href="/wiki/2011_GA" title="2011 GA">2011 GA</a></li> <li><a href="/wiki/2009_BD" title="2009 BD">2009 BD</a></li> <li><a href="/wiki/2011_MD" title="2011 MD">2011 MD</a></li> <li><span class="nowrap"><a href="/wiki/(415029)_2011_UL21" title="(415029) 2011 UL21">(415029) 2011 UL<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">21</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/(436724)_2011_UW158" title="(436724) 2011 UW158">(436724) 2011 UW<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">158</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/(308635)_2005_YU55" title="(308635) 2005 YU55">(308635) 2005 YU<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">55</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/(549948)_2011_WL2" title="(549948) 2011 WL2">(549948) 2011 WL<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">2</span></span></a></span></li> <li><span class="nowrap"><a href="/wiki/2011_XC2" title="2011 XC2">2011 XC<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">2</span></span></a></span></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/List_of_exoplanets_discovered_in_2011" title="List of exoplanets discovered in 2011">Exoplanets</a> <span typeof="mw:File"><a href="/wiki/Category:Exoplanets_discovered_in_2011" title="Category:Exoplanets discovered in 2011"><img alt="Exoplanets discovered in 2011" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/15px-Symbol_category_class.svg.png" decoding="async" width="15" height="15" 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/30px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></a></span></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/82_G._Eridani" title="82 G. Eridani">82 G. Eridani</a> <ul><li>b</li> <li>c</li> <li>d</li></ul></li> <li><a href="/wiki/Gliese_433" title="Gliese 433">Gliese 433 b</a></li> <li>habitability of <a href="/wiki/Gliese_581d" title="Gliese 581d">Gliese 581d</a></li> <li><a href="/wiki/Gliese_3634_b" class="mw-redirect" title="Gliese 3634 b">Gliese 3634 b</a></li> <li><a href="/wiki/HAT-P-32b" title="HAT-P-32b">HAT-P-32b</a></li> <li><a href="/wiki/HAT-P-33b" title="HAT-P-33b">HAT-P-33b</a></li> <li><a href="/wiki/HD_1502" title="HD 1502">HD 1502 b</a></li> <li><a href="/wiki/HD_7199" title="HD 7199">HD 7199 b</a></li> <li><a href="/wiki/HD_30856" title="HD 30856">HD 30856 b</a></li> <li><a href="/wiki/HD_82886" title="HD 82886">HD 82886 b</a></li> <li><a href="/wiki/HD_85512_b" class="mw-redirect" title="HD 85512 b">HD 85512 b</a></li> <li><a href="/wiki/HD_96063" title="HD 96063">HD 96063 b</a></li> <li><a href="/wiki/HD_98219" title="HD 98219">HD 98219 b</a></li> <li><a href="/wiki/HD_100655" title="HD 100655">HD 100655 b</a></li> <li><a href="/wiki/HD_131496" title="HD 131496">HD 131496 b</a></li> <li><a href="/wiki/HD_137388" title="HD 137388">HD 137388 b</a></li> <li><a href="/wiki/HIP_57274" title="HIP 57274">HIP 57274</a> <ul><li>b</li> <li>c</li> <li><a href="/wiki/HIP_57274_d" title="HIP 57274 d">d</a></li></ul></li> <li><a href="/wiki/HR_7722_c" class="mw-redirect" title="HR 7722 c">HR 7722 c</a></li> <li><a href="/wiki/Kepler-9d" title="Kepler-9d">Kepler-9d</a></li> <li><a href="/wiki/Kepler-10" title="Kepler-10">Kepler-10</a> <ul><li><a href="/wiki/Kepler-10b" title="Kepler-10b">b</a></li> <li><a href="/wiki/Kepler-10c" title="Kepler-10c">c</a></li></ul></li> <li><a href="/wiki/Kepler-11" title="Kepler-11">Kepler-11</a> <ul><li><a href="/wiki/Kepler-11b" title="Kepler-11b">b</a></li> <li><a href="/wiki/Kepler-11c" title="Kepler-11c">c</a></li> <li><a href="/wiki/Kepler-11d" title="Kepler-11d">d</a></li> <li><a href="/wiki/Kepler-11e" title="Kepler-11e">e</a></li> <li><a href="/wiki/Kepler-11f" title="Kepler-11f">f</a></li> <li><a href="/wiki/Kepler-11g" title="Kepler-11g">g</a></li></ul></li> <li><a href="/wiki/Kepler-14b" title="Kepler-14b">Kepler-14b</a></li> <li><a href="/wiki/Kepler-16b" title="Kepler-16b">Kepler-16b</a></li> <li><a href="/wiki/Kepler-18" title="Kepler-18">Kepler-18</a> <ul><li>b</li> <li>c</li> <li>d</li></ul></li> <li><a href="/wiki/Kepler-20" title="Kepler-20">Kepler-20</a> <ul><li><a href="/wiki/Kepler-20b" title="Kepler-20b">b</a></li> <li><a href="/wiki/Kepler-20c" title="Kepler-20c">c</a></li> <li><a href="/wiki/Kepler-20d" title="Kepler-20d">d</a></li> <li><a href="/wiki/Kepler-20e" title="Kepler-20e">e</a></li> <li><a href="/wiki/Kepler-20f" title="Kepler-20f">f</a></li></ul></li> <li><a href="/wiki/Kepler-22b" title="Kepler-22b">Kepler-22b</a></li> <li><a href="/wiki/Kepler-39b" title="Kepler-39b">Kepler-39b</a></li> <li><a href="/wiki/Kepler-70" title="Kepler-70">Kepler-70</a> <ul><li><a href="/wiki/Kepler-70b" class="mw-redirect" title="Kepler-70b">b</a></li> <li><a href="/wiki/Kepler-70c" class="mw-redirect" title="Kepler-70c">c</a></li></ul></li> <li><a href="/wiki/LkCa_15_b" class="mw-redirect" title="LkCa 15 b">LkCa 15 b</a></li> <li><a href="/wiki/MOA-2009-BLG-387Lb" title="MOA-2009-BLG-387Lb">MOA-2009-BLG-387Lb</a></li> <li><a href="/wiki/PSR_J1719%E2%88%921438_b" title="PSR J1719−1438 b">PSR J1719−1438 b</a></li> <li><a href="/wiki/WASP-39b" title="WASP-39b">WASP-39b</a></li> <li><a href="/wiki/WASP-43b" title="WASP-43b">WASP-43b</a></li> <li><a href="/wiki/WASP-44b" title="WASP-44b">WASP-44b</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Discoveries</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/UDFj-39546284" title="UDFj-39546284">UDFj-39546284</a></li> <li><a class="mw-selflink selflink">Swift J1644+57</a></li> <li><a href="/wiki/Kronberger_61" title="Kronberger 61">Kronberger 61</a></li> <li><a href="/wiki/WD_0806%E2%88%92661" title="WD 0806−661">WD 0806−661</a></li> <li><a href="/wiki/ULAS_J1120%2B0641" title="ULAS J1120+0641">ULAS J1120+0641</a></li> <li><a href="/wiki/Kerberos_(moon)" title="Kerberos (moon)">Kerberos (moon)</a></li> <li><a href="/wiki/PSR_J1719%E2%88%921438" title="PSR J1719−1438">PSR J1719−1438</a></li> <li><a href="/wiki/Uranus_trojan" class="mw-redirect" title="Uranus trojan">Uranus trojan</a> <span class="nowrap"><a href="/wiki/2011_QF99" class="mw-redirect" title="2011 QF99">2011 QF<span style="position: relative; top: 0.3em;"><span style="font-size:80%;">99</span></span></a></span></li> <li><a href="/wiki/U1.11" title="U1.11">U1.11</a></li> <li><a href="/wiki/SDSS_J102915%2B172927" title="SDSS J102915+172927">SDSS J102915+172927</a></li> <li>2 <a href="/wiki/Moons_of_Jupiter" title="Moons of Jupiter">moons of Jupiter</a></li> <li><a href="/wiki/GRB_111209A" title="GRB 111209A">GRB 111209A</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Nova" title="Nova">Novae</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/SN_2010lt" title="SN 2010lt">SN 2010lt</a></li> <li><a href="/wiki/SN_2011by" title="SN 2011by">SN 2011by</a></li> <li><a href="/wiki/SN_2011dh" title="SN 2011dh">SN 2011dh</a></li> <li><a href="/wiki/SN_2011fe" title="SN 2011fe">SN 2011fe</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Comets <span typeof="mw:File"><a href="/wiki/Category:Comets_in_2011" title="Category:Comets in 2011"><img alt="Comets in 2011" src="//upload.wikimedia.org/wikipedia/en/thumb/9/96/Symbol_category_class.svg/15px-Symbol_category_class.svg.png" decoding="async" width="15" height="15" 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/30px-Symbol_category_class.svg.png 2x" data-file-width="180" data-file-height="185" /></a></span></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/P/2011_NO1_(Elenin)" class="mw-redirect" title="P/2011 NO1 (Elenin)"><span class="nowrap">P/2011 NO<sub>1</sub></span> (Elenin)</a></li> <li><a href="/wiki/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="/wiki/C/2011_W3_(Lovejoy)" title="C/2011 W3 (Lovejoy)">C/2011 W3 (Lovejoy)</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:1%">Space exploration</th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><i><a href="/wiki/MESSENGER" title="MESSENGER">MESSENGER</a></i> (<a href="/wiki/Mercury_(planet)" title="Mercury (planet)">Mercury</a> orbital insertion; Apr 2011)</li> <li><a href="/wiki/Spirit_(rover)" title="Spirit (rover)"><i>Spirit</i></a> (end of mission; Mar 2010 / May 2011)</li> <li><a href="/wiki/Dawn_(spacecraft)" title="Dawn (spacecraft)"><i>Dawn</i></a> (<a href="/wiki/4_Vesta" title="4 Vesta">Vesta</a> orbital insertion; Jul 2011)</li></ul> </div></td></tr><tr><td class="navbox-abovebelow" colspan="3"><div> <ul><li><span class="nowrap"><span class="noviewer" typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Earth-moon.jpg/32px-Earth-moon.jpg" decoding="async" width="32" height="26" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Earth-moon.jpg/48px-Earth-moon.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/5/5c/Earth-moon.jpg/64px-Earth-moon.jpg 2x" data-file-width="3000" data-file-height="2400" /></span></span> </span><a href="/wiki/Portal:Outer_space" title="Portal:Outer space">Outer space portal</a></li> <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:2010_in_outer_space" title="Category:2010 in outer space">Category:2010 in outer space</a> — <b><a href="/wiki/Category:2011_in_outer_space" title="Category:2011 in outer space">Category:2011 in outer space</a></b> — <a href="/wiki/Category:2012_in_outer_space" title="Category:2012 in outer space">Category:2012 in outer space</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; 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