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class="vector-toc-numb">5</span> <span>External links</span> </div> </a> <ul id="toc-External_links-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toggle the table of contents" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon 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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-ast mw-list-item"><a href="https://ast.wikipedia.org/wiki/Ni2_Lupi" title="Ni2 Lupi – Asturian" lang="ast" hreflang="ast" data-title="Ni2 Lupi" data-language-autonym="Asturianu" data-language-local-name="Asturian" class="interlanguage-link-target"><span>Asturianu</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Ni2_Lupi" title="Ni2 Lupi – Spanish" lang="es" hreflang="es" data-title="Ni2 Lupi" 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/%D9%86%D9%88%C2%B2_%DA%AF%D8%B1%DA%AF" title="نو² گرگ – Persian" lang="fa" hreflang="fa" data-title="نو² گرگ" data-language-autonym="فارسی" data-language-local-name="Persian" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Nu2_Lupi" title="Nu2 Lupi – Italian" lang="it" hreflang="it" data-title="Nu2 Lupi" data-language-autonym="Italiano" data-language-local-name="Italian" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-nl mw-list-item"><a href="https://nl.wikipedia.org/wiki/Nu%C2%B2_Lupi" title="Nu² Lupi – Dutch" lang="nl" hreflang="nl" data-title="Nu² Lupi" data-language-autonym="Nederlands" data-language-local-name="Dutch" class="interlanguage-link-target"><span>Nederlands</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/%E3%81%8A%E3%81%8A%E3%81%8B%E3%81%BF%E5%BA%A7%E3%83%8B%E3%83%A5%E3%83%BC2%E6%98%9F" title="おおかみ座ニュー2星 – Japanese" lang="ja" hreflang="ja" data-title="おおかみ座ニュー2星" data-language-autonym="日本語" data-language-local-name="Japanese" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Ni2_Lupi" title="Ni2 Lupi – Polish" lang="pl" hreflang="pl" data-title="Ni2 Lupi" 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/Nu2_Lupi" title="Nu2 Lupi – Portuguese" 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</div> </div> </div> </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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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=15.363375&de=-48.317627777778&zoom=3&show_grid=1&show_constellation_lines=1&show_constellation_boundaries=1&show_const_names=1&show_galaxies=1&img_source=IMG_all">15<sup>h</sup> 21<sup>m</sup> 48.15<sup>s</sup>, −48° 19′ 03.46″</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"><span class="mw-redirectedfrom">(Redirected from <a href="/w/index.php?title=Nu2_Lupi_b&redirect=no" class="mw-redirect" title="Nu2 Lupi b">Nu2 Lupi b</a>)</span></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">Star in the constellation of Lupus</div> <table class="infobox" style="width: 22em; font-size: 88%; line-height: 1.5em"> <caption style="font-size: 125%; font-weight: bold">ν<sup>2</sup> Lupi </caption><tbody><tr><td colspan="2" style="text-align:center;"><div style="text-align: center; margin-left:auto; margin-right:auto"><div class="center"> <div class="floatnone"> <div style="width:240px;"> <div style="position:relative; background-color:#FFFFFF; ;"><span typeof="mw:File"><a href="/wiki/File:Lupus_IAU.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/Lupus_IAU.svg/240px-Lupus_IAU.svg.png" decoding="async" width="240" height="227" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/94/Lupus_IAU.svg/360px-Lupus_IAU.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/94/Lupus_IAU.svg/480px-Lupus_IAU.svg.png 2x" data-file-width="605" data-file-height="571" /></a></span><div style="position: absolute; z-index: 2; height: 0; width: 0; margin: 0; padding: 0; top: 58.0%; left: 47.9%;"> <div style="position: relative; z-index: 3; line-height: 0; text-align: center; width: 10px; left: -5px; top: -5px;"><span typeof="mw:File"><a href="/wiki/%CE%9D%5E2_Lup" title="Ν^2 Lup"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/Red_circle.svg/10px-Red_circle.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/0/05/Red_circle.svg/15px-Red_circle.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/0/05/Red_circle.svg/20px-Red_circle.svg.png 2x" data-file-width="200" data-file-height="200" /></a></span></div><div style="position: relative; z-index: 4; font-size: 90%; line-height: 111%; width: 6em; top: -1.5em; left: 0.5em; text-align: left;"><span style="padding: 1px;"></span></div> </div></div> </div> </div> </div>A <a href="/wiki/Star_chart" title="Star chart">star chart</a> of the constellation of Lupus showing the position of ν<sup>2</sup></div></td></tr> <tr> <th style="text-align: center; background-color: #FFFFC0;" colspan="2">Observation data<br /><a href="/wiki/Epoch_(astronomy)" title="Epoch (astronomy)">Epoch</a> J2000      <a href="/wiki/Equinox_(celestial_coordinates)" title="Equinox (celestial coordinates)">Equinox</a> J2000 </th></tr> <tr style="vertical-align:top"> <th style="text-align:left"><a href="/wiki/Constellation" title="Constellation">Constellation</a> </th> <td><a href="/wiki/Lupus_(constellation)" title="Lupus (constellation)">Lupus</a> </td></tr> <tr style="vertical-align:top"> <th style="text-align:left"><span class="nowrap"><a href="/wiki/Right_ascension" title="Right ascension">Right ascension</a></span> </th> <td><span class="nowrap">15<sup>h</sup> 21<sup>m</sup> 48.14991<sup>s</sup></span><sup id="cite_ref-GaiaDR3_1-0" class="reference"><a href="#cite_note-GaiaDR3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </td></tr> <tr style="vertical-align:top"> <th style="text-align:left"><a href="/wiki/Declination" title="Declination">Declination</a> </th> <td>−48° 19′ 03.4699″<sup id="cite_ref-GaiaDR3_1-1" class="reference"><a href="#cite_note-GaiaDR3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </td></tr> <tr style="vertical-align:top"> <th style="text-align:left"><span class="nowrap"><a href="/wiki/Apparent_magnitude" title="Apparent magnitude">Apparent magnitude</a> (V)</span> </th> <td>5.7821 ± 0.0006<sup id="cite_ref-van_Leeuwen2007_2-0" class="reference"><a href="#cite_note-van_Leeuwen2007-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </td></tr> <tr> <th style="background-color: #FFFFC0; text-align: center;" colspan="2">Characteristics </th></tr> <tr style="vertical-align:top"> <th style="text-align:left"><a href="/wiki/Stellar_evolution" title="Stellar evolution">Evolutionary stage</a> </th> <td><a href="/wiki/Main_sequence" title="Main sequence">Main sequence</a> </td></tr> <tr style="vertical-align:top"> <th style="text-align:left"><a href="/wiki/Stellar_classification" title="Stellar classification">Spectral type</a> </th> <td>G4V<sup id="cite_ref-Ehrenreich2023_3-0" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </td></tr> <tr style="vertical-align:top"> <th style="text-align:left">U−B <a href="/wiki/Color_index" title="Color index">color index</a> </th> <td>0.05<sup id="cite_ref-ducati_4-0" class="reference"><a href="#cite_note-ducati-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> </td></tr> <tr style="vertical-align:top"> <th style="text-align:left">B−V <a href="/wiki/Color_index" title="Color index">color index</a> </th> <td>0.639 ± 0.003<sup id="cite_ref-van_Leeuwen2007_2-1" class="reference"><a href="#cite_note-van_Leeuwen2007-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </td></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2"><a href="/wiki/Astrometry" title="Astrometry">Astrometry</a></th></tr><tr><th colspan="2" style="text-align: center"></th></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Radial_velocity" title="Radial velocity">Radial velocity</a> (R<sub>v</sub>)</b></td><td><span class="nowrap"><span data-sort-value="2998312200000000000♠"></span>−68.78<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.12</span><sup id="cite_ref-GaiaDR3_1-2" class="reference"><a href="#cite_note-GaiaDR3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> km/s</td></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Proper_motion" title="Proper motion">Proper motion</a> (μ)</b></td><td> <abbr title="Right Ascension">RA:</abbr> <span class="nowrap"><span data-sort-value="2996837672500000000♠"></span>−1<span style="margin-left:.25em;">623</span>.275<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.061</span> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a><sup id="cite_ref-GaiaDR3_1-3" class="reference"><a href="#cite_note-GaiaDR3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> <br /> <abbr title="Declination">Dec.:</abbr> <span class="nowrap"><span data-sort-value="2997724452000000000♠"></span>−275.548<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.072</span> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a><sup id="cite_ref-GaiaDR3_1-3" class="reference"><a href="#cite_note-GaiaDR3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </td></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Stellar_parallax" title="Stellar parallax">Parallax</a> (π)</b></td><td>67.8467 ± 0.0601 <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a><sup id="cite_ref-GaiaDR3_1-4" class="reference"><a href="#cite_note-GaiaDR3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup></td></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Distance_(astronomy)" class="mw-redirect" title="Distance (astronomy)">Distance</a></b></td><td>48.07 ± 0.04 <a href="/wiki/Light-year" title="Light-year">ly</a> <br />(14.74 ± 0.01 <a href="/wiki/Parsec" title="Parsec">pc</a>)</td></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Absolute_magnitude" title="Absolute magnitude">Absolute magnitude</a> (M<sub>V</sub>)</b></td><td>4.80<sup id="cite_ref-Anderson2012_5-0" class="reference"><a href="#cite_note-Anderson2012-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup></td></tr><tr><th colspan="2" style="text-align: center"></th></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Details</th></tr><tr><th colspan="2" style="text-align: center"></th></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Stellar_mass" title="Stellar mass">Mass</a></b></td><td><span class="nowrap"><span data-sort-value="6999876000000000000♠"></span>0.876<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.026<br />−0.032</span></span></span><sup id="cite_ref-Ehrenreich2023_3-1" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Solar_mass" title="Solar mass"><var>M</var><sub>☉</sub></a></td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Radius" title="Radius">Radius</a></b></td><td><span class="nowrap"><span data-sort-value="7000105400000000000♠"></span>1.054<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.014</span><sup id="cite_ref-Ehrenreich2023_3-2" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Solar_radius" title="Solar radius"><var>R</var><sub>☉</sub></a></td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Luminosity" title="Luminosity">Luminosity</a></b></td><td>1.038 ± 0.059<sup id="cite_ref-DelrezEhrenreich2021_6-0" class="reference"><a href="#cite_note-DelrezEhrenreich2021-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Solar_luminosity" title="Solar luminosity"><var>L</var><sub>☉</sub></a></td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Surface_gravity" title="Surface gravity">Surface gravity</a> (log <i>g</i>)</b></td><td>4.39 ± 0.11<sup id="cite_ref-DelrezEhrenreich2021_6-1" class="reference"><a href="#cite_note-DelrezEhrenreich2021-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Centimetre%E2%80%93gram%E2%80%93second_system_of_units" title="Centimetre–gram–second system of units">cgs</a></td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Effective_temperature" title="Effective temperature">Temperature</a></b></td><td>5664 ± 61<sup id="cite_ref-DelrezEhrenreich2021_6-2" class="reference"><a href="#cite_note-DelrezEhrenreich2021-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Kelvin" title="Kelvin">K</a></td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Metallicity" title="Metallicity">Metallicity</a></b> [Fe/H]</td><td><span class="nowrap"><span data-sort-value="3000659999999999999♠"></span>−0.34<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.04</span><sup id="cite_ref-Ehrenreich2023_3-3" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Decimal_exponent" class="mw-redirect" title="Decimal exponent">dex</a></td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Stellar_rotation" title="Stellar rotation">Rotation</a></b></td><td>23.8 ± 3.1 days <sup id="cite_ref-DelrezEhrenreich2021_6-3" class="reference"><a href="#cite_note-DelrezEhrenreich2021-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup></td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Projected_rotational_velocity" class="mw-redirect" title="Projected rotational velocity">Rotational velocity</a> (<i>v</i> sin <i>i</i>)</b></td><td>2.0 ± 0.5<sup id="cite_ref-Valenti2005_7-0" class="reference"><a href="#cite_note-Valenti2005-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> km/s</td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Stellar_evolution" title="Stellar evolution">Age</a></b></td><td><span class="nowrap"><span data-sort-value="7001117000000000000♠"></span>11.7<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+2.1<br />−2.3</span></span></span><sup id="cite_ref-Ehrenreich2023_3-4" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Gigayear" class="mw-redirect" title="Gigayear">Gyr</a></td></tr><tr><th colspan="2" style="text-align: center"></th></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2"><a href="/wiki/Star_catalogue" title="Star catalogue">Other designations</a></th></tr><tr><td colspan="2"><div style="width: 250px;"> <a href="/wiki/Bayer_designation" title="Bayer designation">ν<sup>2</sup> Lup</a>, <span class="nowrap"><a href="/wiki/Cordoba_Durchmusterung" class="mw-redirect" title="Cordoba Durchmusterung">CD</a>−47° 9919</span>, <a href="/wiki/Gliese_Catalogue_of_Nearby_Stars" title="Gliese Catalogue of Nearby Stars">GJ</a> 582, <a href="/wiki/Henry_Draper_Catalogue" title="Henry Draper Catalogue">HD</a> 136352, <a href="/wiki/Hipparcos_Catalogue" class="mw-redirect" title="Hipparcos Catalogue">HIP</a> 75181, <a href="/wiki/Harvard_Revised_catalogue" class="mw-redirect" title="Harvard Revised catalogue">HR</a> 5699, <a href="/wiki/Smithsonian_Astrophysical_Observatory_Star_Catalog" title="Smithsonian Astrophysical Observatory Star Catalog">SAO</a> 225697, <span class="nowrap"><a href="/wiki/Tess_object_of_interest" class="mw-redirect" title="Tess object of interest">TOI</a>-2011</span>, <span class="nowrap"><a href="/wiki/TESS_Input_Catalog" class="mw-redirect" title="TESS Input Catalog">TIC</a> 136916387</span><sup id="cite_ref-Ehrenreich2023_3-5" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </div></td></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2">Database references</th></tr><tr style="vertical-align: top;"><td><b><a href="/wiki/SIMBAD" title="SIMBAD">SIMBAD</a></b></td><td><a rel="nofollow" class="external text" href="https://simbad.cds.unistra.fr/simbad/sim-id?Ident=nu2+lup">data</a></td></tr> </tbody></table> <p><b>Nu<sup>2</sup> Lupi</b> (<b>ν<sup>2</sup> Lupi</b>) is a 6th <a href="/wiki/Apparent_magnitude" title="Apparent magnitude">magnitude</a> <a href="/wiki/G-type_main-sequence_star" title="G-type main-sequence star">G-type main-sequence star</a> located approximately 48 <a href="/wiki/Light-year" title="Light-year">light-years</a> away in the <a href="/wiki/Constellation" title="Constellation">constellation</a> of <a href="/wiki/Lupus_(constellation)" title="Lupus (constellation)">Lupus</a>. The physical properties of the star are similar to those of the <a href="/wiki/Sun" title="Sun">Sun</a>, though Nu<sup>2</sup> Lupi is significantly older. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Properties">Properties</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nu2_Lupi&action=edit&section=1" title="Edit section: Properties"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Nu<sup>2</sup> Lupi is a bright star, barely observable with the naked eye in good observing conditions, that lies towards the bottom of Lupus near to the border with <a href="/wiki/Norma_(constellation)" title="Norma (constellation)">Norma</a> and close to the galactic plane. </p><p>At over 1.6 arcseconds per year, Nu<sup>2</sup> Lupi has a particularly large proper motion. This indicates that the star is nearby, which was confirmed by Earth-based parallax measurements during the last century such as that of the <a href="/wiki/Gliese_Catalogue_of_Nearby_Stars" title="Gliese Catalogue of Nearby Stars">Gliese Catalogue of Nearby Stars</a>, measuring 63.1 ± 7.8 milli-arcseconds. The much more accurate space-based Hipparcos parallax of 67.51 ± 0.39 milli-arcseconds gives a distance of 48.3 ± 0.3 <a href="/wiki/Light-year" title="Light-year">light-years</a>, making Nu<sup>2</sup> Lupi one of the closest G-type main-sequence stars to the Sun. As of 2023<sup class="plainlinks noexcerpt noprint asof-tag update" style="display:none;"><a class="external text" href="https://en.wikipedia.org/w/index.php?title=Nu2_Lupi&action=edit">[update]</a></sup>, the best parallax is <span class="nowrap"><span data-sort-value="7001678467000000000♠"></span>67.8467<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.0601</span> milli-arcseconds from <a href="/wiki/Gaia_DR3" class="mw-redirect" title="Gaia DR3">Gaia DR3</a>, corresponding to a distance of <span class="nowrap"><span data-sort-value="7001480700000000000♠"></span>48.07<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.04</span> light-years.<sup id="cite_ref-GaiaDR3_1-5" class="reference"><a href="#cite_note-GaiaDR3-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> </p><p>Somewhat surprisingly, Nu<sup>2</sup> Lupi also has a large radial velocity of -68.7 km/s. When combined with its large proper motion, it becomes apparent that the star is moving much faster through the galaxy than the Sun. This indicates that the star is a member of an older, higher-motion stellar population, which is confirmed by the star's position on the Toomre diagram with Nu<sup>2</sup> Lupi showing kinematics of a <a href="/wiki/Thick_disk" title="Thick disk">thick disk</a> star.<sup id="cite_ref-Ecuvillon2007_8-0" class="reference"><a href="#cite_note-Ecuvillon2007-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> This means that Nu<sup>2</sup> Lupi must be considerably older than the Sun, which is supported by its spectroscopic parameters: the depth of the star's iron spectral lines implies an iron abundance of -0.34 ± 0.01 dex, equalling 46 ± 1% of the solar iron abundance - a typical value for a thick disk star. Similarly, the star's surface gravity of log 4.39 ± 0.11 g is somewhat lower than is typical for a main-sequence G-type star and indicates modest evolution, which when combined with a spectroscopically derived mass of 0.87 ± 0.03 <var>M</var><sub>☉</sub> implies an age of around 12.3 billion years, over twice the solar age. Nu<sup>2</sup> Lupi is therefore probably one of the oldest stars in the solar neighbourhood.<sup id="cite_ref-DelrezEhrenreich2021_6-4" class="reference"><a href="#cite_note-DelrezEhrenreich2021-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Takeda2007_9-0" class="reference"><a href="#cite_note-Takeda2007-9"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Sousa08_10-0" class="reference"><a href="#cite_note-Sousa08-10"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Lovis2011_11-0" class="reference"><a href="#cite_note-Lovis2011-11"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Planetary_system">Planetary system</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Nu2_Lupi&action=edit&section=2" title="Edit section: Planetary system"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <table class="wikitable" style="text-align:center; margin-left:auto; margin-right:auto;"> <caption>The Nu2 Lupi planetary system<sup id="cite_ref-Kane2020_12-0" class="reference"><a href="#cite_note-Kane2020-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Ehrenreich2023_3-6" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </caption> <tbody><tr> <th align="center">Companion<br /><small>(in order from star)</small> </th> <th align="center"><a href="/wiki/Mass" title="Mass">Mass</a> </th> <th align="center"><a href="/wiki/Semi-major_and_semi-minor_axes" title="Semi-major and semi-minor axes">Semimajor axis</a><br /><small>(<a href="/wiki/Astronomical_unit" title="Astronomical unit">AU</a>)</small> </th> <th align="center"><a href="/wiki/Orbital_period" title="Orbital period">Orbital period</a><br /><small>(<a href="/wiki/Day" title="Day">days</a>)</small> </th> <th align="center"><a href="/wiki/Orbital_eccentricity" title="Orbital eccentricity">Eccentricity</a> </th> <th align="center"><a href="/wiki/Orbital_inclination" title="Orbital inclination">Inclination</a> </th> <th align="center"><a href="/wiki/Radius" title="Radius">Radius</a> </th></tr> <tr> <td><b>b</b> </td> <td><span class="nowrap"><span data-sort-value="7000468000000000000♠"></span>4.68<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.40</span> <a href="/wiki/Earth_mass" title="Earth mass"><span class="texhtml mvar" style="font-style:italic;">M</span><sub>🜨</sub></a> </td> <td><span class="nowrap"><span data-sort-value="6998963000000000000♠"></span>0.0963<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.0021</span> </td> <td><span class="nowrap"><span data-sort-value="7001115777940000000♠"></span>11.577<span style="margin-left:.25em;">794</span><span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.000<span style="margin-left:.25em;">023</span><br />−0.000<span style="margin-left:.25em;">025</span></span></span></span> </td> <td>0.079<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">+0.068</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline">−0.053</sub></span></span> </td> <td><span class="nowrap"><span data-sort-value="7001885300000000000♠"></span>88.53<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.11</span><a href="/wiki/Degree_(angle)" title="Degree (angle)">°</a> </td> <td><span class="nowrap"><span data-sort-value="7000164300000000000♠"></span>1.643<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.035</span> <a href="/wiki/Earth_radius" title="Earth radius"><span class="texhtml mvar" style="font-style:italic;">R</span><sub>🜨</sub></a> </td></tr> <tr> <td><b>c</b> </td> <td><span class="nowrap"><span data-sort-value="7001112200000000000♠"></span>11.22<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.60<br />−0.58</span></span></span> <a href="/wiki/Earth_mass" title="Earth mass"><span class="texhtml mvar" style="font-style:italic;">M</span><sub>🜨</sub></a> </td> <td><span class="nowrap"><span data-sort-value="6999171700000000000♠"></span>0.1717<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.0037</span> </td> <td><span class="nowrap"><span data-sort-value="7001275920760000000♠"></span>27.592<span style="margin-left:.25em;">076</span><span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.000<span style="margin-left:.25em;">047</span><br />−0.000<span style="margin-left:.25em;">049</span></span></span></span> </td> <td>0.037<span class="nowrap"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:80%;text-align:left"><sup style="font-size:inherit;line-height:inherit;vertical-align:baseline">+0.039</sup><br /><sub style="font-size:inherit;line-height:inherit;vertical-align:baseline">−0.026</sub></span></span> </td> <td><span class="nowrap"><span data-sort-value="7001885800000000000♠"></span>88.580<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.032<br />−0.033</span></span></span><a href="/wiki/Degree_(angle)" title="Degree (angle)">°</a> </td> <td><span class="nowrap"><span data-sort-value="7000285700000000000♠"></span>2.857<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.058<br />−0.057</span></span></span> <a href="/wiki/Earth_radius" title="Earth radius"><span class="texhtml mvar" style="font-style:italic;">R</span><sub>🜨</sub></a> </td></tr> <tr> <td><b>d</b> </td> <td><span class="nowrap"><span data-sort-value="7000866000000000000♠"></span>8.66<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.90<br />−0.91</span></span></span> <a href="/wiki/Earth_mass" title="Earth mass"><span class="texhtml mvar" style="font-style:italic;">M</span><sub>🜨</sub></a> </td> <td><span class="nowrap"><span data-sort-value="6999424300000000000♠"></span>0.4243<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.0092</span> </td> <td><span class="nowrap"><span data-sort-value="7002107136300000000♠"></span>107.1363<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.0019<br />−0.0024</span></span></span> </td> <td>~0 </td> <td><span class="nowrap"><span data-sort-value="7001897660000000000♠"></span>89.766<span style="margin-left:0.3em;"><span style="display:inline-block;margin-bottom:-0.3em;vertical-align:-0.4em;line-height:1.2em;font-size:85%;text-align:right;">+0.036<br />−0.033</span></span></span><a href="/wiki/Degree_(angle)" title="Degree (angle)">°</a> </td> <td><span class="nowrap"><span data-sort-value="7000250700000000000♠"></span>2.507<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.042</span> <a href="/wiki/Earth_radius" title="Earth radius"><span class="texhtml mvar" style="font-style:italic;">R</span><sub>🜨</sub></a> </td></tr> </tbody></table> <p>On September 12, 2011, three low-mass planets were announced in a <a href="/wiki/Preprint" title="Preprint">preprint</a>, using data from the <a href="/wiki/High_Accuracy_Radial_Velocity_Planet_Searcher" title="High Accuracy Radial Velocity Planet Searcher">HARPS</a> spectrograph.<sup id="cite_ref-Mayor2011_13-0" class="reference"><a href="#cite_note-Mayor2011-13"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> These three planets are among about seven dozen planets discovered in September 2011, the most of any month up to that point during the exoplanet era that began in the early 1990s. The confirmation of these planets was published in <i><a href="/wiki/Astronomy_%26_Astrophysics" title="Astronomy & Astrophysics">Astronomy & Astrophysics</a></i> in 2019.<sup id="cite_ref-Udry2019_14-0" class="reference"><a href="#cite_note-Udry2019-14"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> The two inner planets were also detected using the <a href="/wiki/Transit_(astronomy)" class="mw-redirect" title="Transit (astronomy)">transit method</a> in 2020, allowing a precise determination of their masses and radii.<sup id="cite_ref-Kane2020_12-1" class="reference"><a href="#cite_note-Kane2020-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> In 2021, planet d was also found to transit using observations from <a href="/wiki/CHEOPS" title="CHEOPS">CHEOPS</a>, allowing its mass and radius to be determined.<sup id="cite_ref-DelrezEhrenreich2021_6-5" class="reference"><a href="#cite_note-DelrezEhrenreich2021-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Further transit observations with CHEOPS were used to refine the planetary parameters and to search for signs of an <a href="/wiki/Exomoon" title="Exomoon">exomoon</a> around planet d, although no evidence of a moon was found.<sup id="cite_ref-Ehrenreich2023_3-7" class="reference"><a href="#cite_note-Ehrenreich2023-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>With a mass of about 5 Earth masses, the innermost planet falls into the regime of <a href="/wiki/Super-Earth" title="Super-Earth">super-Earths</a>, and was confirmed to be mostly rocky with a density of 7.8 g/cm<sup>3</sup> in 2020.<sup id="cite_ref-Kane2020_12-2" class="reference"><a href="#cite_note-Kane2020-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> The outer two planets straddle the boundary between super-Earths and Neptune-mass planets, so they are less likely to have predominantly rocky compositions. The middle planet Nu2 Lupi c with a density of 3.5 g/cm<sup>3</sup> is expected to have a large gaseous envelope.<sup id="cite_ref-Kane2020_12-3" class="reference"><a href="#cite_note-Kane2020-12"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> All three planets orbit within 0.5 AU and are likely too hot to maintain liquid water. </p><p>The most recent published observation of this system for debris disks was in 2006 by the Spitzer telescope, searching for an excess of infra-red light that would indicate scattering of starlight by dust or planetesimals; no infra-red excess was detected.<sup id="cite_ref-disk_15-0" class="reference"><a href="#cite_note-disk-15"><span class="cite-bracket">[</span>15<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=Nu2_Lupi&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/Nu1_Lupi" title="Nu1 Lupi">Nu<sup>1</sup> Lupi</a></li> <li><a href="/wiki/List_of_extrasolar_planets_detected_by_radial_velocity" class="mw-redirect" title="List of extrasolar planets detected by radial velocity">List of extrasolar planets detected by radial velocity</a></li> <li><a href="/wiki/82_G._Eridani" title="82 G. Eridani">82 G. Eridani</a></li> <li><a href="/wiki/Mu_Arae" title="Mu Arae">Mu Arae</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=Nu2_Lupi&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-GaiaDR3-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-GaiaDR3_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-GaiaDR3_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-GaiaDR3_1-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-GaiaDR3_1-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-GaiaDR3_1-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-GaiaDR3_1-5"><sup><i><b>f</b></i></sup></a></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 id="CITEREFVallenariBrownPrustiDe_Bruijne2023" class="citation journal cs1">Vallenari, A.; et al. (Gaia collaboration) (2023). <a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202243940">"<i>Gaia</i> Data Release 3. Summary of the content and survey properties"</a>. <i>Astronomy and Astrophysics</i>. <b>674</b>: A1. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/2208.00211">2208.00211</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2023A&A...674A...1G">2023A&A...674A...1G</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202243940">10.1051/0004-6361/202243940</a></span>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:244398875">244398875</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+and+Astrophysics&rft.atitle=Gaia+Data+Release+3.+Summary+of+the+content+and+survey+properties&rft.volume=674&rft.pages=A1&rft.date=2023&rft_id=info%3Aarxiv%2F2208.00211&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A244398875%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F202243940&rft_id=info%3Abibcode%2F2023A%26A...674A...1G&rft.aulast=Vallenari&rft.aufirst=A.&rft.au=Brown%2C+A.+G.+A.&rft.au=Prusti%2C+T.&rft.au=De+Bruijne%2C+J.+H.+J.&rft.au=Arenou%2C+F.&rft.au=Babusiaux%2C+C.&rft.au=Biermann%2C+M.&rft.au=Creevey%2C+O.+L.&rft.au=Ducourant%2C+C.&rft.au=Evans%2C+D.+W.&rft.au=Eyer%2C+L.&rft.au=Guerra%2C+R.&rft.au=Hutton%2C+A.&rft.au=Jordi%2C+C.&rft.au=Klioner%2C+S.+A.&rft.au=Lammers%2C+U.+L.&rft.au=Lindegren%2C+L.&rft.au=Luri%2C+X.&rft.au=Mignard%2C+F.&rft.au=Panem%2C+C.&rft.au=Pourbaix%2C+D.&rft.au=Randich%2C+S.&rft.au=Sartoretti%2C+P.&rft.au=Soubiran%2C+C.&rft.au=Tanga%2C+P.&rft.au=Walton%2C+N.+A.&rft.au=Bailer-Jones%2C+C.+A.+L.&rft.au=Bastian%2C+U.&rft.au=Drimmel%2C+R.&rft_id=https%3A%2F%2Fdoi.org%2F10.1051%252F0004-6361%252F202243940&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANu2+Lupi" class="Z3988"></span>  <a rel="nofollow" class="external text" href="https://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20DR3%205902750168276592256">Gaia DR3 record for this source</a> at <a href="/wiki/VizieR" title="VizieR">VizieR</a>.</span> </li> <li id="cite_note-van_Leeuwen2007-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-van_Leeuwen2007_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-van_Leeuwen2007_2-1"><sup><i><b>b</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFvan_Leeuwen2007" class="citation journal cs1">van Leeuwen, F. (2007). <a rel="nofollow" class="external text" href="http://www.aanda.org/index.php?option=com_article&access=bibcode&Itemid=129&bibcode=2007A%2526A...474..653VFUL">"Validation of the new Hipparcos reduction"</a>. <i>Astronomy and Astrophysics</i>. <b>474</b> (2): 653–664. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/0708.1752">0708.1752</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2007A&A...474..653V">2007A&A...474..653V</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%3A20078357">10.1051/0004-6361:20078357</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:18759600">18759600</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+and+Astrophysics&rft.atitle=Validation+of+the+new+Hipparcos+reduction&rft.volume=474&rft.issue=2&rft.pages=653-664&rft.date=2007&rft_id=info%3Aarxiv%2F0708.1752&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A18759600%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1051%2F0004-6361%3A20078357&rft_id=info%3Abibcode%2F2007A%26A...474..653V&rft.aulast=van+Leeuwen&rft.aufirst=F.&rft_id=http%3A%2F%2Fwww.aanda.org%2Findex.php%3Foption%3Dcom_article%26access%3Dbibcode%26Itemid%3D129%26bibcode%3D2007A%252526A...474..653VFUL&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANu2+Lupi" class="Z3988"></span> <a rel="nofollow" class="external text" href="http://webviz.u-strasbg.fr/viz-bin/VizieR-5?-out.add=.&-source=I/311/hip2&recno=74935">Vizier catalog entry </a></span> </li> <li id="cite_note-Ehrenreich2023-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-Ehrenreich2023_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Ehrenreich2023_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Ehrenreich2023_3-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Ehrenreich2023_3-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-Ehrenreich2023_3-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-Ehrenreich2023_3-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-Ehrenreich2023_3-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-Ehrenreich2023_3-7"><sup><i><b>h</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFEhrenreichDelrez2023" class="citation journal cs1">Ehrenreich, D.; Delrez, L.; et al. 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"A full transit of ν2 Lupi d and the search for an exomoon in its Hill sphere with CHEOPS". <i><a href="/wiki/Astronomy_%26_Astrophysics" title="Astronomy & Astrophysics">Astronomy & Astrophysics</a></i>. <b>671</b>: A154. <a href="/wiki/ArXiv_(identifier)" class="mw-redirect" title="ArXiv (identifier)">arXiv</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://arxiv.org/abs/2302.01853">2302.01853</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2023A&A...671A.154E">2023A&A...671A.154E</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202244790">10.1051/0004-6361/202244790</a>. <a href="/wiki/S2CID_(identifier)" class="mw-redirect" title="S2CID (identifier)">S2CID</a> <a rel="nofollow" class="external text" href="https://api.semanticscholar.org/CorpusID:256598325">256598325</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+%26+Astrophysics&rft.atitle=A+full+transit+of+%CE%BD2+Lupi+d+and+the+search+for+an+exomoon+in+its+Hill+sphere+with+CHEOPS&rft.volume=671&rft.pages=A154&rft.date=2023-02&rft_id=info%3Aarxiv%2F2302.01853&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A256598325%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F202244790&rft_id=info%3Abibcode%2F2023A%26A...671A.154E&rft.aulast=Ehrenreich&rft.aufirst=D.&rft.au=Delrez%2C+L.&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANu2+Lupi" class="Z3988"></span></span> </li> <li id="cite_note-ducati-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-ducati_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFDucati2002" class="citation journal cs1">Ducati, J. 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Retrieved <span class="nowrap">10 May</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=SolStation&rft.atitle=Nu2+Lupi&rft_id=http%3A%2F%2Fwww.solstation.com%2Fstars2%2Fnu2-lupi.htm&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANu2+Lupi" class="Z3988"></span></li> <li><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://www.astrostudio.org/xhip.php?hip=75181">"Nu-2 Lupi (HIP 75181)"</a>. <i>Ashland Astronomy Studio</i><span class="reference-accessdate">. Retrieved <span class="nowrap">10 May</span> 2013</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Ashland+Astronomy+Studio&rft.atitle=Nu-2+Lupi+%28HIP+75181%29&rft_id=http%3A%2F%2Fwww.astrostudio.org%2Fxhip.php%3Fhip%3D75181&rfr_id=info%3Asid%2Fen.wikipedia.org%3ANu2+Lupi" class="Z3988"></span></li></ul> <p><br /> </p> <div class="navbox-styles"><style data-mw-deduplicate="TemplateStyles:r1129693374">.mw-parser-output .hlist dl,.mw-parser-output .hlist ol,.mw-parser-output .hlist ul{margin:0;padding:0}.mw-parser-output .hlist dd,.mw-parser-output .hlist dt,.mw-parser-output .hlist li{margin:0;display:inline}.mw-parser-output .hlist.inline,.mw-parser-output .hlist.inline dl,.mw-parser-output .hlist.inline ol,.mw-parser-output .hlist.inline ul,.mw-parser-output .hlist dl dl,.mw-parser-output .hlist dl ol,.mw-parser-output .hlist dl ul,.mw-parser-output .hlist ol dl,.mw-parser-output .hlist ol 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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/Alpha_Lupi" title="Alpha Lupi">α</a></li> <li><a href="/wiki/Beta_Lupi" title="Beta Lupi">β</a></li> <li><a href="/wiki/Gamma_Lupi" title="Gamma Lupi">γ</a></li> <li><a href="/wiki/Delta_Lupi" title="Delta Lupi">δ</a></li> <li><a href="/wiki/Epsilon_Lupi" title="Epsilon Lupi">ε</a></li> <li><a href="/wiki/Zeta_Lupi" title="Zeta Lupi">ζ</a></li> <li><a href="/wiki/Eta_Lupi" title="Eta Lupi">η</a></li> <li><a href="/wiki/Theta_Lupi" title="Theta Lupi">θ</a></li> <li><a href="/wiki/Iota_Lupi" title="Iota Lupi">ι</a></li> <li><a href="/wiki/Kappa1_Lupi" title="Kappa1 Lupi">κ<sup>1</sup></a></li> <li><a href="/wiki/Kappa2_Lupi" title="Kappa2 Lupi">κ<sup>2</sup></a></li> <li><a href="/wiki/Lambda_Lupi" title="Lambda Lupi">λ</a></li> <li><a href="/wiki/Mu_Lupi" title="Mu Lupi">μ</a></li> <li><a href="/wiki/Nu1_Lupi" title="Nu1 Lupi">ν<sup>1</sup></a></li> <li><a class="mw-selflink selflink">ν<sup>2</sup></a></li> <li><a href="/wiki/Xi1_Lupi" title="Xi1 Lupi">ξ<sup>1</sup></a></li> <li><a href="/wiki/Xi2_Lupi" title="Xi2 Lupi">ξ<sup>2</sup></a></li> <li><a href="/wiki/Omicron_Lupi" title="Omicron Lupi">ο</a></li> <li><a href="/wiki/Pi_Lupi" title="Pi Lupi">π</a></li> <li><a href="/wiki/Rho_Lupi" title="Rho Lupi">ρ</a></li> <li><a href="/wiki/Sigma_Lupi" title="Sigma Lupi">σ</a></li> <li><a href="/wiki/Tau1_Lupi" title="Tau1 Lupi">τ<sup>1</sup></a></li> <li><a href="/wiki/Tau2_Lupi" title="Tau2 Lupi">τ<sup>2</sup></a></li> <li><a href="/wiki/Upsilon_Lupi" title="Upsilon Lupi">υ</a></li> <li><a href="/wiki/Phi1_Lupi" title="Phi1 Lupi">φ<sup>1</sup></a></li> <li><a href="/wiki/Phi2_Lupi" title="Phi2 Lupi">φ<sup>2</sup></a></li> <li><a href="/wiki/Chi_Lupi" title="Chi Lupi">χ</a></li> <li><a href="/wiki/Psi1_Lupi" title="Psi1 Lupi">ψ<sup>1</sup></a></li> <li><a href="/wiki/Psi2_Lupi" title="Psi2 Lupi">ψ<sup>2</sup></a></li> <li><a href="/wiki/Omega_Lupi" title="Omega Lupi">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/1_Lupi" title="1 Lupi">1 (i)</a></li> <li><a href="/wiki/2_Lupi" title="2 Lupi">2 (f)</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/RU_Lupi" title="RU Lupi">RU</a></li> <li><a href="/wiki/EX_Lupi" title="EX Lupi">EX</a></li> <li><a href="/wiki/GG_Lupi" title="GG Lupi">GG</a></li> <li><a href="/wiki/GQ_Lupi" title="GQ Lupi">GQ</a></li> <li><a href="/wiki/HD_133880" title="HD 133880">HR</a></li> <li><a href="/wiki/II_Lupi" title="II Lupi">II</a></li> <li><a href="/wiki/4U_1543-475" title="4U 1543-475">IL</a></li> <li><a href="/wiki/IM_Lupi" title="IM Lupi">IM</a></li> <li><a href="/wiki/KT_Lupi" title="KT Lupi">KT (d)</a></li> <li><a href="/wiki/V407_Lupi" title="V407 Lupi">V407</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_125442" title="HD 125442">5364</a></li> <li><a href="/wiki/HR_5401" title="HR 5401">5401</a></li> <li><a href="/wiki/HD_134687" title="HD 134687">5651 (e)</a></li> <li><a href="/wiki/HD_137058" title="HD 137058">5724 (k)</a></li> <li><a href="/wiki/HD_139664" title="HD 139664">5825 (g)</a></li> <li><a href="/wiki/HD_143009" title="HD 143009">5943</a></li> <li><a href="/wiki/HD_143699" title="HD 143699">5967</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/WASP-178" title="WASP-178">134004</a></li> <li><a href="/wiki/HD_142527" title="HD 142527">142527</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/Gliese_588" title="Gliese 588">Gliese 588</a></li> <li><a href="/wiki/HIP_70849" title="HIP 70849">HIP 70849</a></li> <li><a href="/wiki/Lupus-TR-3" title="Lupus-TR-3">Lupus-TR-3</a></li> <li><a href="/wiki/SAO_206462" title="SAO 206462">SAO 206462</a></li> <li><a href="/wiki/SSSPM_J1549-3544" title="SSSPM J1549-3544">SSSPM J1549-3544</a></li> <li><a href="/wiki/WASP-132" title="WASP-132">WASP-132</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/GQ_Lupi_b" title="GQ Lupi b">GQ Lupi b</a></li> <li><a href="/wiki/HIP_70849_b" title="HIP 70849 b">HIP 70849 b</a></li> <li><a href="/wiki/Lupus-TR-3b" title="Lupus-TR-3b">Lupus-TR-3b</a></li> <li><a href="/wiki/WASP-178b" title="WASP-178b">WASP-178b</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/NGC_5749" title="NGC 5749">NGC 5749</a></li> <li><a href="/wiki/NGC_5822" title="NGC 5822">NGC 5822</a></li> <li><a href="/wiki/NGC_5824" title="NGC 5824">NGC 5824</a></li> <li><a href="/wiki/NGC_5927" title="NGC 5927">NGC 5927</a></li> <li><a href="/wiki/NGC_5986" title="NGC 5986">NGC 5986</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/IC_4406" title="IC 4406">IC 4406</a></li> <li><a href="/wiki/NGC_5882" title="NGC 5882">NGC 5882</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="Galaxies" scope="row" class="navbox-group" style="width:151px;background: #ddddff;"><a href="/wiki/Galaxy" title="Galaxy">Galaxies</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_5643" title="NGC 5643">NGC 5643</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:Lupus_(constellation)" title="Category:Lupus 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