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href="/wiki/File:SPHERE_observations_of_the_planet_HD_131399Ab.tif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/9/96/SPHERE_observations_of_the_planet_HD_131399Ab.tif/lossy-page1-250px-SPHERE_observations_of_the_planet_HD_131399Ab.tif.jpg" decoding="async" width="250" height="250" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/96/SPHERE_observations_of_the_planet_HD_131399Ab.tif/lossy-page1-375px-SPHERE_observations_of_the_planet_HD_131399Ab.tif.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/96/SPHERE_observations_of_the_planet_HD_131399Ab.tif/lossy-page1-500px-SPHERE_observations_of_the_planet_HD_131399Ab.tif.jpg 2x" data-file-width="3000" data-file-height="3000" /></a></span><br />SPHERE image of HD 131399 A (top left), B and C (bottom right), and the background object (center)<br /><b>Credit</b>: <i>ESO/K. Wagner et al.</i></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> <a href="/wiki/J2000" class="mw-redirect" title="J2000">J2000</a>      <a href="/wiki/Equinox_(celestial_coordinates)" title="Equinox (celestial coordinates)">Equinox</a> <a href="/wiki/J2000" class="mw-redirect" title="J2000">J2000</a> </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/Centaurus" title="Centaurus">Centaurus</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">14<sup>h</sup> 54<sup>m</sup> 25.30919<sup>s</sup></span><sup id="cite_ref-HIP_1-0" class="reference"><a href="#cite_note-HIP-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>−34° 08′ 34.0412″<sup id="cite_ref-HIP_1-1" class="reference"><a href="#cite_note-HIP-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>7.07<sup id="cite_ref-TYC2_2-0" class="reference"><a href="#cite_note-TYC2-2"><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_classification" title="Stellar classification">Spectral type</a> </th> <td>A1V + G + K<sup id="cite_ref-Wagner_3-0" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<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>0.30 ± 1.3<sup id="cite_ref-Kharchenko_4-0" class="reference"><a href="#cite_note-Kharchenko-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> km/s</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><span class="nowrap"><span data-sort-value="7002351000000000000♠"></span>351<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;">+15<br />−12</span></span></span> <a href="/wiki/Light-year" title="Light-year">ly</a> <br />(<span class="nowrap"><span data-sort-value="7002107900000000000♠"></span>107.9<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;">+4.5<br />−3.7</span></span></span><sup id="cite_ref-Nielsen_5-0" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Parsec" title="Parsec">pc</a>)</td></tr><tr><th colspan="2" style="text-align: center"></th></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2"></th></tr><tr><th colspan="2" style="text-align: center">A</th></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> −30.702<sup id="cite_ref-edr3a_6-0" class="reference"><a href="#cite_note-edr3a-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a> <br /> <abbr title="Declination">Dec.:</abbr> −30.774<sup id="cite_ref-edr3a_6-1" class="reference"><a href="#cite_note-edr3a-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a> </td></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Stellar_parallax" title="Stellar parallax">Parallax</a> (π)</b></td><td>9.7480 ± 0.0357 <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a><sup id="cite_ref-edr3a_6-2" class="reference"><a href="#cite_note-edr3a-6"><span class="cite-bracket">[</span>6<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>335 ± 1 <a href="/wiki/Light-year" title="Light-year">ly</a> <br />(102.6 ± 0.4 <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>1.89<sup id="cite_ref-przbylla2017_7-0" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></td></tr><tr><th colspan="2" style="text-align: center">BC</th></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> −31.523<sup id="cite_ref-edr3b_8-0" class="reference"><a href="#cite_note-edr3b-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a> <br /> <abbr title="Declination">Dec.:</abbr> −31.047<sup id="cite_ref-edr3b_8-1" class="reference"><a href="#cite_note-edr3b-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a> </td></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Stellar_parallax" title="Stellar parallax">Parallax</a> (π)</b></td><td>9.3021 ± 0.0633 <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a><sup id="cite_ref-edr3b_8-2" class="reference"><a href="#cite_note-edr3b-8"><span class="cite-bracket">[</span>8<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>351 ± 2 <a href="/wiki/Light-year" title="Light-year">ly</a> <br />(107.5 ± 0.7 <a href="/wiki/Parsec" title="Parsec">pc</a>)</td></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2"><a href="/wiki/Orbit" title="Orbit">Orbit</a><sup id="cite_ref-Wagner_3-1" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup></th></tr><tr style="vertical-align:baseline;"><td><b>Primary</b></td><td>A</td></tr><tr style="vertical-align:baseline;"><td><b>Companion</b></td><td>BC</td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Orbital_period" title="Orbital period">Period</a> (P)</b></td><td>3556 ± 36 <a href="/wiki/Year" title="Year">yr</a></td></tr><tr style="vertical-align:baseline;"><td><span class="nowrap"><b><a href="/wiki/Semi-major_axis" class="mw-redirect" title="Semi-major axis">Semi-major axis</a> (a)</b></span></td><td>3.56 ± 0.03″<br />(349 ± 28 au)</td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Eccentricity_(orbit)" class="mw-redirect" title="Eccentricity (orbit)">Eccentricity</a> (e)</b></td><td>0.13 ± 0.05</td></tr><tr style="vertical-align:baseline;"><td><b><a href="/wiki/Inclination" class="mw-redirect" title="Inclination">Inclination</a> (i)</b></td><td>45 to 65°</td></tr><tr style="vertical-align:baseline;"><td><span class="nowrap"><b><a href="/wiki/Longitude_of_the_node" class="mw-redirect" title="Longitude of the node">Longitude of the node</a> (Ω)</b></span></td><td>265 ± 20<sup id="cite_ref-9" class="reference"><a href="#cite_note-9"><span class="cite-bracket">[</span>note 1<span class="cite-bracket">]</span></a></sup>°</td></tr><tr style="vertical-align:baseline;"><td><span class="nowrap"><b><a href="/wiki/Periastron" class="mw-redirect" title="Periastron">Periastron</a> <a href="/wiki/Epoch_(astronomy)" title="Epoch (astronomy)">epoch</a> (T)</b></span></td><td><a href="/wiki/Besselian_year" class="mw-redirect" title="Besselian year">B</a> 502 ± 33</td></tr><tr style="vertical-align:baseline;"><td><span class="nowrap"><b><a href="/wiki/Argument_of_periastron" class="mw-redirect" title="Argument of periastron">Argument of periastron</a> (ω)</b></span><br />(secondary)</td><td>145.3 ± 15<sup id="cite_ref-10" class="reference"><a href="#cite_note-10"><span class="cite-bracket">[</span>note 2<span class="cite-bracket">]</span></a></sup>°</td></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_evolution" title="Stellar evolution">Age</a></b></td><td><span class="nowrap"><span data-sort-value="7001219000000000000♠"></span>21.9<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;">+4.1<br />−3.8</span></span></span><sup id="cite_ref-Nielsen_5-1" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Megayear" class="mw-redirect" title="Megayear">Myr</a></td></tr><tr><th colspan="2" style="text-align: center">HD 131399 A</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="7000195000000000000♠"></span>1.95<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;">+0.08<br />−0.06</span></span></span><sup id="cite_ref-przbylla2017_7-1" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<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="7000151000000000000♠"></span>1.51<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;">+0.13<br />−0.10</span></span></span><sup id="cite_ref-przbylla2017_7-2" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<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>Luminosity</b></td><td><span class="nowrap"><span data-sort-value="7001148000000000000♠"></span>14.8<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;">+2.6<br />−2.2</span></span></span><sup id="cite_ref-przbylla2017_7-3" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<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><span class="nowrap"><span data-sort-value="7000437000000000000♠"></span>4.37<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.10</span><sup id="cite_ref-przbylla2017_7-4" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<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><span class="nowrap"><span data-sort-value="7003920000000000000♠"></span>9,200<span style="margin-left:0.3em;margin-right:0.15em;">±</span>100</span><sup id="cite_ref-przbylla2017_7-5" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<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/Projected_rotational_velocity" class="mw-redirect" title="Projected rotational velocity">Rotational velocity</a> (<i>v</i> sin <i>i</i>)</b></td><td><span class="nowrap"><span data-sort-value="7001260000000000000♠"></span>26<span style="margin-left:0.3em;margin-right:0.15em;">±</span>2</span><sup id="cite_ref-przbylla2017_7-6" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> km/s</td></tr> <tr><th style="background-color: #FFFFC0; text-align: center;" colspan="2"></th></tr><tr><th colspan="2" style="text-align: center">HD 131399 B</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="6999950000000000000♠"></span>0.95<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.04</span><sup id="cite_ref-Nielsen_5-2" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<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/Surface_gravity" title="Surface gravity">Surface gravity</a> (log <i>g</i>)</b></td><td><span class="nowrap"><span data-sort-value="7000440000000000000♠"></span>4.40<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.03</span><sup id="cite_ref-Nielsen_5-3" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<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><span class="nowrap"><span data-sort-value="7003489000000000000♠"></span>4,890<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;">+190<br />−170</span></span></span><sup id="cite_ref-Nielsen_5-4" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Kelvin" title="Kelvin">K</a></td></tr><tr><th colspan="2" style="text-align: center">HD 131399 C</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="6999350000000000000♠"></span>0.35<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.04</span><sup id="cite_ref-Nielsen_5-5" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<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/Surface_gravity" title="Surface gravity">Surface gravity</a> (log <i>g</i>)</b></td><td><span class="nowrap"><span data-sort-value="7000445000000000000♠"></span>4.45<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.05</span><sup id="cite_ref-Nielsen_5-6" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<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><span class="nowrap"><span data-sort-value="7003346000000000000♠"></span>3,460<span style="margin-left:0.3em;margin-right:0.15em;">±</span>60</span><sup id="cite_ref-Nielsen_5-7" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> <a href="/wiki/Kelvin" title="Kelvin">K</a></td></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;"> <span class="nowrap"><a href="/wiki/Cordoba_Durchmusterung" class="mw-redirect" title="Cordoba Durchmusterung">CD</a>−33°10153</span>, <a href="/wiki/Henry_Draper_Catalogue" title="Henry Draper Catalogue">HD</a> 131399, <a href="/wiki/Hipparcos_Catalogue" class="mw-redirect" title="Hipparcos Catalogue">HIP</a> 72940, <a href="/wiki/Smithsonian_Astrophysical_Observatory_Star_Catalog" title="Smithsonian Astrophysical Observatory Star Catalog">SAO</a> 206071 </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=HD+131399">data</a></td></tr> </tbody></table> <p><b>HD 131399</b> is a <a href="/wiki/Star_system" title="Star system">star system</a> in the <a href="/wiki/Constellation" title="Constellation">constellation</a> of <a href="/wiki/Centaurus" title="Centaurus">Centaurus</a>. Based on the system's electromagnetic spectrum, it is located around 350 light-years (107.9 parsecs) away.<sup id="cite_ref-Nielsen_5-8" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The total <a href="/wiki/Apparent_magnitude" title="Apparent magnitude">apparent magnitude</a> is 7.07,<sup id="cite_ref-Nielsen_5-9" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> but because of <a href="/wiki/Interstellar_dust" class="mw-redirect" title="Interstellar dust">interstellar dust</a> between it and the Earth, it appears 0.22 ± 0.09 magnitudes <a href="/wiki/Interstellar_extinction" class="mw-redirect" title="Interstellar extinction">dimmer</a> than it should be.<sup id="cite_ref-Nielsen_5-10" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>The brightest star, is a young <a href="/wiki/A-type_main-sequence_star" title="A-type main-sequence star">A-type main-sequence star</a>, and further out are two lower-mass stars.<sup id="cite_ref-Wagner_3-2" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> A <a href="/wiki/Jupiter" title="Jupiter">Jupiter</a>-mass planet or a low-mass <a href="/wiki/Brown_dwarf" title="Brown dwarf">brown dwarf</a> was once thought to be orbiting the central star, but this has been ruled out.<sup id="cite_ref-Nielsen_5-11" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-Wagner_retraction_11-0" class="reference"><a href="#cite_note-Wagner_retraction-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Stellar_system">Stellar system</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HD_131399&action=edit&section=1" title="Edit section: Stellar system"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>The brightest star in the HD 131399 system is designated HD 131399 A. Its spectral type is A1V,<sup id="cite_ref-Wagner_3-3" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> and it is 2.08 times as massive as the Sun.<sup id="cite_ref-Nielsen_5-12" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> The two lower-mass stars are designated HD 131399 B and C, respectively. B is a <a href="/wiki/G-type_main-sequence_star" title="G-type main-sequence star">G-type main-sequence star</a>, while HD 131399 C is a <a href="/wiki/K-type_main-sequence_star" title="K-type main-sequence star">K-type main-sequence star</a>.<sup id="cite_ref-Wagner_3-4" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> Both stars are less massive than the Sun.<sup id="cite_ref-Nielsen_5-13" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>HD 131399 B and C are located very close to each other, and the two orbit each other at about 10 AU.<sup id="cite_ref-SciNews_12-0" class="reference"><a href="#cite_note-SciNews-12"><span class="cite-bracket">[</span>10<span class="cite-bracket">]</span></a></sup> In turn, the B-C pair orbits the central star A at a distance of 349 <a href="/wiki/Astronomical_unit" title="Astronomical unit">astronomical units</a> (au). This orbit takes about 3,600 years to complete, and it has an eccentricity of about 0.13<sup id="cite_ref-Wagner_3-5" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The entire system is about 21.9 million years old.<sup id="cite_ref-Nielsen_5-14" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> </p><p>One paper has reported that HD 131399 A has a companion in an inclined 10-day orbit with a <a href="/wiki/Semi-major_axis" class="mw-redirect" title="Semi-major axis">semi-major axis</a> of <span class="nowrap"><span data-sort-value="7010149597870700000♠"></span>0.1 <a href="/wiki/Astronomical_unit" title="Astronomical unit">AU</a></span>.<sup id="cite_ref-lagrange2017_13-0" class="reference"><a href="#cite_note-lagrange2017-13"><span class="cite-bracket">[</span>11<span class="cite-bracket">]</span></a></sup> HD 131399 A has been described as a "nascent <a href="/wiki/Am_star" title="Am star">Am star</a>"; although it has a very slow projected rotation rate and would be expected to show <a href="/wiki/Chemically_peculiar_star" title="Chemically peculiar star">chemical peculiarities</a>, its <a href="/wiki/Stellar_spectrum" class="mw-redirect" title="Stellar spectrum">spectrum</a> is relatively normal, possibly due to its young age.<sup id="cite_ref-przbylla2017_7-7" class="reference"><a href="#cite_note-przbylla2017-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Claims_of_a_planetary_system">Claims of a planetary system</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=HD_131399&action=edit&section=2" title="Edit section: Claims of a planetary system"><span>edit</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size mw-halign-left" typeof="mw:File/Thumb"><a href="/wiki/File:An_artist%E2%80%99s_impression_of_planet_in_the_HD_131399_system.tif" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/An_artist%E2%80%99s_impression_of_planet_in_the_HD_131399_system.tif/lossy-page1-220px-An_artist%E2%80%99s_impression_of_planet_in_the_HD_131399_system.tif.jpg" decoding="async" width="220" height="138" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/c/c4/An_artist%E2%80%99s_impression_of_planet_in_the_HD_131399_system.tif/lossy-page1-330px-An_artist%E2%80%99s_impression_of_planet_in_the_HD_131399_system.tif.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/c/c4/An_artist%E2%80%99s_impression_of_planet_in_the_HD_131399_system.tif/lossy-page1-440px-An_artist%E2%80%99s_impression_of_planet_in_the_HD_131399_system.tif.jpg 2x" data-file-width="5000" data-file-height="3125" /></a><figcaption>Artist's impression of HD 131399 Ab, before it was found to be a background star.</figcaption></figure> <p>The claimed discovery of a massive planet, named HD 131399 Ab, was announced in a paper published in the journal <i><a href="/wiki/Science_(journal)" title="Science (journal)">Science</a></i>.<sup id="cite_ref-Wagner_3-6" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> The object was imaged using the <a href="/wiki/Spectro-Polarimetric_High-Contrast_Exoplanet_Research" title="Spectro-Polarimetric High-Contrast Exoplanet Research">SPHERE</a> imager of the <a href="/wiki/Very_Large_Telescope" title="Very Large Telescope">Very Large Telescope</a> at the <a href="/wiki/European_Southern_Observatory" title="European Southern Observatory">European Southern Observatory</a>, located in the <a href="/wiki/Atacama_Desert" title="Atacama Desert">Atacama Desert</a> of <a href="/wiki/Chile" title="Chile">Chile</a>, and announced in a July 2016 paper in the journal <i><a href="/wiki/Science_(journal)" title="Science (journal)">Science</a></i>.<sup id="cite_ref-Wagner_3-7" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-cbsnews_14-0" class="reference"><a href="#cite_note-cbsnews-14"><span class="cite-bracket">[</span>12<span class="cite-bracket">]</span></a></sup> It was thought to be a <a href="/wiki/T-type_star" class="mw-redirect" title="T-type star">T-type</a> object with a mass of <span class="nowrap">4 ± 1</span> <var>M</var><sub>J</sub>,<sup id="cite_ref-Wagner_3-8" class="reference"><a href="#cite_note-Wagner-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> but its orbit would have been unstable, causing it to be ejected between the primary's <a href="/wiki/Red_giant_branch" class="mw-redirect" title="Red giant branch">red giant phase</a> and <a href="/wiki/White_dwarf" title="White dwarf">white dwarf</a> phase.<sup id="cite_ref-15" class="reference"><a href="#cite_note-15"><span class="cite-bracket">[</span>13<span class="cite-bracket">]</span></a></sup> This was the first exoplanet candidate to be discovered by SPHERE. The image was created from two separate SPHERE observations: one to image the three stars and one to detect the faint planet.<sup id="cite_ref-ESO_16-0" class="reference"><a href="#cite_note-ESO-16"><span class="cite-bracket">[</span>14<span class="cite-bracket">]</span></a></sup> After its discovery, the team unofficially named the system "Scorpion-1" and the planet "Scorpion-1b", after the survey that prompted its discovery, the Scorpion Planet Survey (principal investigator: <a href="/wiki/Daniel_Apai" title="Daniel Apai">Daniel Apai</a>).<sup id="cite_ref-Scorpion-1b_17-0" class="reference"><a href="#cite_note-Scorpion-1b-17"><span class="cite-bracket">[</span>15<span class="cite-bracket">]</span></a></sup> </p><p>In May 2017, observations made by the <a href="/wiki/Gemini_Planet_Imager" title="Gemini Planet Imager">Gemini Planet Imager</a> and including a reanalysis of the SPHERE data suggest that this target is, in fact, a <a href="/wiki/Fixed_stars" title="Fixed stars">background star</a>. This object's <a href="/wiki/Spectrum" title="Spectrum">spectrum</a> seems to be like that of a <a href="/wiki/K-type_main-sequence_star" title="K-type main-sequence star">K-type</a> or <a href="/wiki/Red_dwarf" title="Red dwarf">M-type dwarf</a>, not a T-type object as first thought. It also initially appeared to be associated with HD 131399, but this was because of its unusually high proper motion (in the top 4% fastest-moving stars).<sup id="cite_ref-Nielsen_5-15" class="reference"><a href="#cite_note-Nielsen-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> After subsequent data published in 2022 confirmed that the object is a background star, the paper announcing the putative discovery was <a href="/wiki/Retractions_in_academic_publishing" class="mw-redirect" title="Retractions in academic publishing">retracted</a>.<sup id="cite_ref-Wagner_retraction_11-1" class="reference"><a href="#cite_note-Wagner_retraction-11"><span class="cite-bracket">[</span>9<span class="cite-bracket">]</span></a></sup><sup id="cite_ref-18" class="reference"><a href="#cite_note-18"><span class="cite-bracket">[</span>16<span class="cite-bracket">]</span></a></sup> </p> <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=HD_131399&action=edit&section=3" 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-HIP-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-HIP_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-HIP_1-1"><sup><i><b>b</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="CITEREFvan_Leeuwen,_F.2007" class="citation journal cs1">van Leeuwen, F.; et al. (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.au=van+Leeuwen%2C+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%3AHD+131399" class="Z3988"></span></span> </li> <li id="cite_note-TYC2-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-TYC2_2-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFHøg,_E.2000" class="citation journal cs1">Høg, E.; et al. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". <i>Astronomy and Astrophysics</i>. <b>355</b>: L27–L30. <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/2000A&A...355L..27H">2000A&A...355L..27H</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=The+Tycho-2+catalogue+of+the+2.5+million+brightest+stars&rft.volume=355&rft.pages=L27-L30&rft.date=2000&rft_id=info%3Abibcode%2F2000A%26A...355L..27H&rft.au=H%C3%B8g%2C+E.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHD+131399" class="Z3988"></span></span> </li> <li id="cite_note-Wagner-3"><span class="mw-cite-backlink">^ <a href="#cite_ref-Wagner_3-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Wagner_3-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Wagner_3-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Wagner_3-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-Wagner_3-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-Wagner_3-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-Wagner_3-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-Wagner_3-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-Wagner_3-8"><sup><i><b>i</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFWagnerApaiKasperKratter2016" class="citation journal cs1">Wagner, K.; Apai, D.; Kasper, M.; Kratter, K.; McClure, M.; Robberto, M.; Beuzit, J.-L. (2016). "Direct imaging discovery of a Jovian exoplanet within a triple-star system". <i>Science</i>. <b>353</b> (6300): 673–8. <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/1607.02525">1607.02525</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/2016Sci...353..673W">2016Sci...353..673W</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1126%2Fscience.aaf9671">10.1126/science.aaf9671</a>. <a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/27386921">27386921</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:206650422">206650422</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Science&rft.atitle=Direct+imaging+discovery+of+a+Jovian+exoplanet+within+a+triple-star+system&rft.volume=353&rft.issue=6300&rft.pages=673-8&rft.date=2016&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A206650422%23id-name%3DS2CID&rft_id=info%3Abibcode%2F2016Sci...353..673W&rft_id=info%3Aarxiv%2F1607.02525&rft_id=info%3Apmid%2F27386921&rft_id=info%3Adoi%2F10.1126%2Fscience.aaf9671&rft.aulast=Wagner&rft.aufirst=K.&rft.au=Apai%2C+D.&rft.au=Kasper%2C+M.&rft.au=Kratter%2C+K.&rft.au=McClure%2C+M.&rft.au=Robberto%2C+M.&rft.au=Beuzit%2C+J.-L.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHD+131399" class="Z3988"></span><span class="" style="font-size:0.95em; font-weight:bold; color: #555;"> (Retracted, see <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1126%2Fscience.abq1709">10.1126/science.abq1709</a>, <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><a href="/wiki/PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/35420970">35420970</a>,  <a rel="nofollow" class="external text" href="https://retractionwatch.com/2022/04/14/triple-sunrise-triple-sunset-science-paper-retracted-when-it-turns-out-a-planet-is-a-star/"><i>Retraction Watch</i></a>)</span></span> </li> <li id="cite_note-Kharchenko-4"><span class="mw-cite-backlink"><b><a href="#cite_ref-Kharchenko_4-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFKharchenko,_N._V.2007" class="citation journal cs1">Kharchenko, N. V.; et al. (2007). "Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ~55000 stars and mean radial velocities of 516 Galactic open clusters and associations". <i>Astronomische Nachrichten</i>. <b>328</b> (9): 889. <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/0705.0878">0705.0878</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/2007AN....328..889K">2007AN....328..889K</a>. <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1002%2Fasna.200710776">10.1002/asna.200710776</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:119323941">119323941</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomische+Nachrichten&rft.atitle=Astrophysical+supplements+to+the+ASCC-2.5%3A+Ia.+Radial+velocities+of+~55000+stars+and+mean+radial+velocities+of+516+Galactic+open+clusters+and+associations&rft.volume=328&rft.issue=9&rft.pages=889&rft.date=2007&rft_id=info%3Aarxiv%2F0705.0878&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A119323941%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1002%2Fasna.200710776&rft_id=info%3Abibcode%2F2007AN....328..889K&rft.au=Kharchenko%2C+N.+V.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHD+131399" class="Z3988"></span></span> </li> <li id="cite_note-Nielsen-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-Nielsen_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Nielsen_5-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Nielsen_5-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Nielsen_5-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-Nielsen_5-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-Nielsen_5-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-Nielsen_5-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-Nielsen_5-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-Nielsen_5-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-Nielsen_5-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-Nielsen_5-10"><sup><i><b>k</b></i></sup></a> <a href="#cite_ref-Nielsen_5-11"><sup><i><b>l</b></i></sup></a> <a href="#cite_ref-Nielsen_5-12"><sup><i><b>m</b></i></sup></a> <a href="#cite_ref-Nielsen_5-13"><sup><i><b>n</b></i></sup></a> <a href="#cite_ref-Nielsen_5-14"><sup><i><b>o</b></i></sup></a> <a href="#cite_ref-Nielsen_5-15"><sup><i><b>p</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFNielsen,_Eric_L.2017" class="citation journal cs1">Nielsen, Eric L.; et al. (2017). <a rel="nofollow" class="external text" href="https://doi.org/10.3847%2F1538-3881%2Faa8a69">"Evidence that the Directly-Imaged Planet HD 131399 Ab is a Background Star"</a>. <i>The Astronomical Journal</i>. <b>154</b> (6): 218. <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/1705.06851">1705.06851</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/2017AJ....154..218N">2017AJ....154..218N</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/10.3847%2F1538-3881%2Faa8a69">10.3847/1538-3881/aa8a69</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:55138870">55138870</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+Astronomical+Journal&rft.atitle=Evidence+that+the+Directly-Imaged+Planet+HD+131399+Ab+is+a+Background+Star&rft.volume=154&rft.issue=6&rft.pages=218&rft.date=2017&rft_id=info%3Aarxiv%2F1705.06851&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A55138870%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.3847%2F1538-3881%2Faa8a69&rft_id=info%3Abibcode%2F2017AJ....154..218N&rft.au=Nielsen%2C+Eric+L.&rft_id=https%3A%2F%2Fdoi.org%2F10.3847%252F1538-3881%252Faa8a69&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHD+131399" class="Z3988"></span></span> </li> <li id="cite_note-edr3a-6"><span class="mw-cite-backlink">^ <a href="#cite_ref-edr3a_6-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-edr3a_6-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-edr3a_6-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBrown2021" class="citation journal cs1"><a href="/wiki/Anthony_Brown_(scientist)" title="Anthony Brown (scientist)">Brown, A. G. A.</a>; et al. (Gaia collaboration) (2021). <a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202039657">"<i>Gaia</i> Early Data Release 3: Summary of the contents and survey properties"</a>. <i><a href="/wiki/Astronomy_%26_Astrophysics" title="Astronomy & Astrophysics">Astronomy & Astrophysics</a></i>. <b>649</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/2012.01533">2012.01533</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/2021A&A...649A...1G">2021A&A...649A...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%2F202039657">10.1051/0004-6361/202039657</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:227254300">227254300</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=Gaia+Early+Data+Release+3%3A+Summary+of+the+contents+and+survey+properties&rft.volume=649&rft.pages=A1&rft.date=2021&rft_id=info%3Aarxiv%2F2012.01533&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A227254300%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F202039657&rft_id=info%3Abibcode%2F2021A%26A...649A...1G&rft.aulast=Brown&rft.aufirst=A.+G.+A.&rft_id=https%3A%2F%2Fdoi.org%2F10.1051%252F0004-6361%252F202039657&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHD+131399" class="Z3988"></span><span class="" style="font-size:0.95em; font-weight:bold; color: #555;"> (Erratum: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><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%2F202039657e">10.1051/0004-6361/202039657e</a>)</span>.  <a rel="nofollow" class="external text" href="http://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20EDR3%206204835284262018688">Gaia EDR3 record for this source</a> at <a href="/wiki/VizieR" title="VizieR">VizieR</a>.</span> </li> <li id="cite_note-przbylla2017-7"><span class="mw-cite-backlink">^ <a href="#cite_ref-przbylla2017_7-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-przbylla2017_7-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-przbylla2017_7-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-przbylla2017_7-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-przbylla2017_7-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-przbylla2017_7-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-przbylla2017_7-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-przbylla2017_7-7"><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="CITEREFPrzybillaAschenbrennerBuder2017" class="citation journal cs1">Przybilla, N.; Aschenbrenner, P.; Buder, S. (2017). "Candidate exoplanet host HD 131399A: A nascent Am star". <i>Astronomy & Astrophysics</i>. <b>604</b>: L9. <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/1707.07920">1707.07920</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/2017A&A...604L...9P">2017A&A...604L...9P</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%2F201731384">10.1051/0004-6361/201731384</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:119230582">119230582</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=Candidate+exoplanet+host+HD+131399A%3A+A+nascent+Am+star&rft.volume=604&rft.pages=L9&rft.date=2017&rft_id=info%3Aarxiv%2F1707.07920&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A119230582%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F201731384&rft_id=info%3Abibcode%2F2017A%26A...604L...9P&rft.aulast=Przybilla&rft.aufirst=N.&rft.au=Aschenbrenner%2C+P.&rft.au=Buder%2C+S.&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHD+131399" class="Z3988"></span></span> </li> <li id="cite_note-edr3b-8"><span class="mw-cite-backlink">^ <a href="#cite_ref-edr3b_8-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-edr3b_8-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-edr3b_8-2"><sup><i><b>c</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><cite id="CITEREFBrown2021" class="citation journal cs1"><a href="/wiki/Anthony_Brown_(scientist)" title="Anthony Brown (scientist)">Brown, A. G. A.</a>; et al. (Gaia collaboration) (2021). <a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F202039657">"<i>Gaia</i> Early Data Release 3: Summary of the contents and survey properties"</a>. <i><a href="/wiki/Astronomy_%26_Astrophysics" title="Astronomy & Astrophysics">Astronomy & Astrophysics</a></i>. <b>649</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/2012.01533">2012.01533</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/2021A&A...649A...1G">2021A&A...649A...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%2F202039657">10.1051/0004-6361/202039657</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:227254300">227254300</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=Gaia+Early+Data+Release+3%3A+Summary+of+the+contents+and+survey+properties&rft.volume=649&rft.pages=A1&rft.date=2021&rft_id=info%3Aarxiv%2F2012.01533&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A227254300%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F202039657&rft_id=info%3Abibcode%2F2021A%26A...649A...1G&rft.aulast=Brown&rft.aufirst=A.+G.+A.&rft_id=https%3A%2F%2Fdoi.org%2F10.1051%252F0004-6361%252F202039657&rfr_id=info%3Asid%2Fen.wikipedia.org%3AHD+131399" class="Z3988"></span><span class="" style="font-size:0.95em; font-weight:bold; color: #555;"> (Erratum: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222"><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%2F202039657e">10.1051/0004-6361/202039657e</a>)</span>.  <a rel="nofollow" class="external text" href="http://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20EDR3%206204835284262018176">Gaia EDR3 record for this source</a> at <a href="/wiki/VizieR" title="VizieR">VizieR</a>.</span> </li> <li id="cite_note-Wagner_retraction-11"><span class="mw-cite-backlink">^ <a href="#cite_ref-Wagner_retraction_11-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Wagner_retraction_11-1"><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="CITEREFWagnerApaiKasperKratter2022" class="citation journal cs1">Wagner, Kevin; 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href="mw-data:TemplateStyles:r1239543626"><div class="reflist"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-9"><span class="mw-cite-backlink"><b><a href="#cite_ref-9">^</a></b></span> <span class="reference-text">There are two solutions; the other one is 75 ± 10°.</span> </li> <li id="cite_note-10"><span class="mw-cite-backlink"><b><a href="#cite_ref-10">^</a></b></span> <span class="reference-text">There are two solutions; the other one is 310 ± 10°.</span> </li> </ol></div></div> <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 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.navbox-image img{max-width:none!important}@media print{body.ns-0 .mw-parser-output .navbox{display:none!important}}</style></div><div role="navigation" class="navbox" aria-labelledby="Constellation_of_Centaurus" style="padding:3px"><table class="nowraplinks hlist mw-collapsible autocollapse navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th scope="col" class="navbox-title" colspan="2" style="text-align: center;"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1129693374"><style data-mw-deduplicate="TemplateStyles:r1239400231">.mw-parser-output .navbar{display:inline;font-size:88%;font-weight:normal}.mw-parser-output .navbar-collapse{float:left;text-align:left}.mw-parser-output .navbar-boxtext{word-spacing:0}.mw-parser-output .navbar ul{display:inline-block;white-space:nowrap;line-height:inherit}.mw-parser-output .navbar-brackets::before{margin-right:-0.125em;content:"[ "}.mw-parser-output .navbar-brackets::after{margin-left:-0.125em;content:" ]"}.mw-parser-output .navbar li{word-spacing:-0.125em}.mw-parser-output .navbar a>span,.mw-parser-output .navbar a>abbr{text-decoration:inherit}.mw-parser-output .navbar-mini abbr{font-variant:small-caps;border-bottom:none;text-decoration:none;cursor:inherit}.mw-parser-output .navbar-ct-full{font-size:114%;margin:0 7em}.mw-parser-output .navbar-ct-mini{font-size:114%;margin:0 4em}html.skin-theme-clientpref-night .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}@media(prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .navbar li a abbr{color:var(--color-base)!important}}@media print{.mw-parser-output .navbar{display:none!important}}</style><div class="navbar plainlinks hlist navbar-mini"><ul><li class="nv-view"><a href="/wiki/Template:Centaurus" title="Template:Centaurus"><abbr title="View this template">v</abbr></a></li><li class="nv-talk"><a href="/wiki/Template_talk:Centaurus" title="Template talk:Centaurus"><abbr title="Discuss this template">t</abbr></a></li><li class="nv-edit"><a href="/wiki/Special:EditPage/Template:Centaurus" title="Special:EditPage/Template:Centaurus"><abbr title="Edit this template">e</abbr></a></li></ul></div><div id="Constellation_of_Centaurus" style="font-size:114%;margin:0 4em"><a href="/wiki/Centaurus_(constellation)" class="mw-redirect" title="Centaurus (constellation)">Constellation of Centaurus</a></div></th></tr><tr><td class="navbox-abovebelow" colspan="2" style="text-align: center;"><div> <ul><li><a href="/wiki/List_of_stars_in_Centaurus" title="List of stars in Centaurus">List of stars in Centaurus</a></li> <li><a href="/wiki/Centaurus_in_Chinese_astronomy" title="Centaurus in Chinese astronomy">Centaurus 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/Alpha_Centauri" title="Alpha Centauri">α</a> <ul><li><a href="/wiki/Alpha_Centauri_A" class="mw-redirect" title="Alpha Centauri A">A (Rigil Kentaurus)</a></li> <li><a href="/wiki/Alpha_Centauri_B" class="mw-redirect" title="Alpha Centauri B">B (Toliman)</a></li> <li><a href="/wiki/Proxima_Centauri" title="Proxima Centauri">C (Proxima Centauri)</a></li></ul></li> <li><a href="/wiki/Beta_Centauri" title="Beta Centauri">β (Hadar)</a></li> <li><a href="/wiki/Gamma_Centauri" title="Gamma Centauri">γ (Muhlifain)</a></li> <li><a href="/wiki/Delta_Centauri" title="Delta Centauri">δ</a></li> <li><a href="/wiki/Epsilon_Centauri" title="Epsilon Centauri">ε</a></li> <li><a href="/wiki/Zeta_Centauri" title="Zeta Centauri">ζ (Alnair)</a></li> <li><a href="/wiki/Eta_Centauri" title="Eta Centauri">η</a></li> <li><a href="/wiki/Theta_Centauri" title="Theta Centauri">θ (Menkent)</a></li> <li><a href="/wiki/Iota_Centauri" title="Iota Centauri">ι</a></li> <li><a href="/wiki/Kappa_Centauri" title="Kappa Centauri">κ</a></li> <li><a href="/wiki/Lambda_Centauri" title="Lambda Centauri">λ</a></li> <li><a href="/wiki/Mu_Centauri" title="Mu Centauri">μ</a></li> <li><a href="/wiki/Nu_Centauri" title="Nu Centauri">ν</a></li> <li><a href="/wiki/Xi1_Centauri" title="Xi1 Centauri">ξ<sup>1</sup></a></li> <li><a href="/wiki/Xi2_Centauri" title="Xi2 Centauri">ξ<sup>2</sup></a></li> <li><a href="/wiki/Omicron1_Centauri" title="Omicron1 Centauri">ο<sup>1</sup></a></li> <li><a href="/wiki/Omicron2_Centauri" title="Omicron2 Centauri">ο<sup>2</sup></a></li> <li><a href="/wiki/Pi_Centauri" title="Pi Centauri">π</a></li> <li><a href="/wiki/Rho_Centauri" title="Rho Centauri">ρ</a></li> <li><a href="/wiki/Sigma_Centauri" title="Sigma Centauri">σ</a></li> <li><a href="/wiki/Tau_Centauri" title="Tau Centauri">τ</a></li> <li><a href="/wiki/Upsilon1_Centauri" title="Upsilon1 Centauri">υ<sup>1</sup></a></li> <li><a href="/wiki/Upsilon2_Centauri" title="Upsilon2 Centauri">υ<sup>2</sup></a></li> <li><a href="/wiki/Phi_Centauri" title="Phi Centauri">φ</a></li> <li><a href="/wiki/Chi_Centauri" title="Chi Centauri">χ</a></li> <li><a href="/wiki/Psi_Centauri" title="Psi Centauri">ψ</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_Centauri" title="1 Centauri">1 (i)</a></li> <li><a href="/wiki/2_Centauri" title="2 Centauri">2 (g)</a></li> <li><a href="/wiki/3_Centauri" title="3 Centauri">3 (k)</a></li> <li><a href="/wiki/4_Centauri" title="4 Centauri">4 (h)</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/R_Centauri" title="R Centauri">R</a></li> <li><a href="/wiki/T_Centauri" title="T Centauri">T</a></li> <li><a href="/wiki/U_Centauri" title="U Centauri">U</a></li> <li><a href="/wiki/V_Centauri" title="V Centauri">V</a></li> <li><a href="/wiki/Y_Centauri" title="Y Centauri">Y</a></li> <li><a href="/wiki/RR_Centauri" title="RR Centauri">RR</a></li> <li><a href="/wiki/SV_Centauri" title="SV Centauri">SV</a></li> <li><a href="/wiki/SX_Centauri" title="SX Centauri">SX</a></li> <li><a href="/wiki/BV_Centauri" title="BV Centauri">BV</a></li> <li><a href="/wiki/DY_Centauri" title="DY Centauri">DY</a></li> <li><a href="/wiki/UY_Centauri" title="UY Centauri">UY</a></li> <li><a href="/wiki/V346_Centauri" title="V346 Centauri">V346</a></li> <li><a href="/wiki/V744_Centauri" title="V744 Centauri">V744</a></li> <li><a href="/wiki/V752_Centauri" title="V752 Centauri">V752</a></li> <li><a href="/wiki/HD_125823" title="HD 125823">V761 (a)</a></li> <li><a href="/wiki/V763_Centauri" title="V763 Centauri">V763 (C<sup>1</sup>)</a></li> <li><a href="/wiki/HR_5171" title="HR 5171">V766</a></li> <li><a href="/wiki/Centaurus_X-3" title="Centaurus X-3">V779</a></li> <li><a href="/wiki/V803_Centauri" title="V803 Centauri">V803</a></li> <li><a href="/wiki/V810_Centauri" title="V810 Centauri">V810</a></li> <li><a href="/wiki/Przybylski%27s_Star" title="Przybylski's Star">V816 (Przybylski's Star)</a></li> <li><a href="/wiki/V831_Centauri" title="V831 Centauri">V831</a></li> <li><a href="/wiki/V842_Centauri" title="V842 Centauri">V842</a></li> <li><a href="/wiki/HD_101584" title="HD 101584">V885</a></li> <li><a href="/wiki/BPM_37093" title="BPM 37093">V886</a></li> <li><a href="/wiki/HD_105382" title="HD 105382">V863</a></li> <li><a href="/wiki/H_Centauri" title="H Centauri">V945 (H)</a></li> <li><a href="/wiki/PDS_70" title="PDS 70">V1032</a></li> <li><a href="/wiki/V1369_Centauri" title="V1369 Centauri">V1369</a></li> <li><a href="/wiki/V1400_Centauri" title="V1400 Centauri">V1400</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_100673" title="HD 100673">4460 (A)</a></li> <li><a href="/wiki/HD_100825" title="HD 100825">4466 (C<sup>2</sup>)</a></li> <li><a href="/wiki/C3_Centauri" title="C3 Centauri">4476 (C<sup>3</sup>)</a></li> <li><a href="/wiki/HD_101570" title="HD 101570">4499</a></li> <li><a href="/wiki/HD_102350" title="HD 102350">4522</a></li> <li><a href="/wiki/HD_102365" title="HD 102365">4523</a></li> <li><a href="/wiki/HD_102776" title="HD 102776">4537 (j)</a></li> <li><a href="/wiki/HD_102964" title="HD 102964">4546 (B)</a></li> <li><a href="/wiki/E_Centauri" title="E Centauri">4620 (E)</a></li> <li><a href="/wiki/D_Centauri" title="D Centauri">4652 (D)</a></li> <li><a href="/wiki/F_Centauri" title="F Centauri">4682 (F)</a></li> <li><a href="/wiki/X1_Centauri" title="X1 Centauri">4712 (x<sup>1</sup>)</a></li> <li><a href="/wiki/HD_108063" title="HD 108063">4721</a></li> <li><a href="/wiki/X2_Centauri" title="X2 Centauri">4724 (x<sup>2</sup>)</a></li> <li><a href="/wiki/G_Centauri" title="G Centauri">4732 (G)</a></li> <li><a href="/wiki/HD_108541" title="HD 108541">4748 (u)</a></li> <li><a href="/wiki/HR_4796" title="HR 4796">4796</a></li> <li><a href="/wiki/HD_110073" title="HD 110073">4817 (l)</a></li> <li><a href="/wiki/HD_110458" title="HD 110458">4831 (w)</a></li> <li><a href="/wiki/HD_111597" title="HD 111597">4874 (p)</a></li> <li><a href="/wiki/HD_111915" title="HD 111915">4888 (e)</a></li> <li><a href="/wiki/HD_111968" title="HD 111968">4889 (n)</a></li> <li><a href="/wiki/HD_113703" title="HD 113703">4940 (f)</a></li> <li><a href="/wiki/HD_114613" title="HD 114613">4979</a></li> <li><a href="/wiki/HD_114837" title="HD 114837">4989</a></li> <li><a href="/wiki/HD_115310" title="HD 115310">5006 (r)</a></li> <li><a href="/wiki/J_Centauri" title="J Centauri">5035 (J)</a></li> <li><a href="/wiki/HD_116243" title="HD 116243">5041 (m)</a></li> <li><a href="/wiki/K_Centauri" title="K Centauri">5071 (K)</a></li> <li><a href="/wiki/HD_117440" title="HD 117440">5089 (d)</a></li> <li><a href="/wiki/Q_Centauri" title="Q Centauri">5141 (Q)</a></li> <li><a href="/wiki/M_Centauri" title="M Centauri">5172 (M)</a></li> <li><a href="/wiki/HD_119921" title="HD 119921">5174 (z)</a></li> <li><a href="/wiki/N_Centauri" title="N Centauri">5207 (N)</a></li> <li><a href="/wiki/HD_120987" title="HD 120987">5222 (y)</a></li> <li><a href="/wiki/HD_121056" title="HD 121056">5224</a></li> <li><a href="/wiki/HD_121474" title="HD 121474">5241</a></li> <li><a href="/wiki/HD_123569" title="HD 123569">5297</a></li> <li><a href="/wiki/HD_125288" title="HD 125288">5358 (v)</a></li> <li><a href="/wiki/HD_125628" title="HD 125628">5371</a></li> <li><a href="/wiki/HD_129116" title="HD 129116">5471 (b)</a></li> <li><a href="/wiki/HD_129456" title="HD 129456">5485 (c<sup>1</sup>)</a></li> <li><a href="/wiki/HD_129685" title="HD 129685">5489 (c<sup>2</sup>)</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/HD_97413" title="HD 97413">97413</a></li> <li><a href="/wiki/HD_98176" title="HD 98176">98176</a></li> <li><a href="/wiki/HD_100453" title="HD 100453">100453</a></li> <li><a href="/wiki/HD_101930" title="HD 101930">101930</a></li> <li><a href="/wiki/HD_102117" title="HD 102117">102117 (Uklun)</a></li> <li><a href="/wiki/HD_103197" title="HD 103197">103197</a></li> <li><a href="/wiki/HD_107914" title="HD 107914">107914</a></li> <li><a href="/wiki/HD_108236" title="HD 108236">108236</a></li> <li><a href="/wiki/HD_109749" title="HD 109749">109749</a></li> <li><a href="/wiki/HD_110113" title="HD 110113">110113</a></li> <li><a href="/wiki/HD_113538" title="HD 113538">113538</a></li> <li><a href="/wiki/HD_113766" title="HD 113766">113766</a></li> <li><a href="/wiki/HD_114386" title="HD 114386">114386</a></li> <li><a href="/wiki/HD_114729" title="HD 114729">114729</a></li> <li><a href="/wiki/HD_115600" title="HD 115600">115600</a></li> <li><a href="/wiki/HIP_65426" class="mw-redirect" title="HIP 65426">116434</a></li> <li><a href="/wiki/HD_117207" title="HD 117207">117207</a></li> <li><a href="/wiki/HD_117618" title="HD 117618">117618 (Dofida)</a></li> <li><a href="/wiki/HD_121228" title="HD 121228">121228</a></li> <li><a href="/wiki/HD_121504" title="HD 121504">121504</a></li> <li><a href="/wiki/HD_124448" title="HD 124448">124448</a></li> <li><a href="/wiki/HD_125072" title="HD 125072">125072</a></li> <li><a href="/wiki/HD_125595" title="HD 125595">125595</a></li> <li><a class="mw-selflink selflink">131399</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_J11263991%E2%88%925003550" title="2MASS J11263991−5003550">2MASS J1126−5003</a></li> <li><a href="/wiki/2M1207" title="2M1207">2M1207</a></li> <li><a href="/wiki/Gaia_BH2" title="Gaia BH2">Gaia BH2</a></li> <li><a href="/wiki/GJ_3737" class="mw-redirect" title="GJ 3737">GJ 3737</a></li> <li><a href="/wiki/J1407b" title="J1407b">J1407b</a></li> <li><a href="/wiki/PSR_B1259%E2%88%9263/LS_2883" title="PSR B1259−63/LS 2883">PSR B1259−63/LS 2883</a></li> <li><a href="/wiki/PSR_J1311%E2%80%933430" title="PSR J1311–3430">PSR J1311–3430</a></li> <li><a href="/wiki/WASP-15" title="WASP-15">WASP-15 (Nyamien)</a></li> <li><a href="/wiki/WASP-41" title="WASP-41">WASP-41</a></li> <li><a href="/wiki/WASP-42" title="WASP-42">WASP-42</a></li> <li><a href="/wiki/CD%E2%88%9234_8618" title="CD−34 8618">WASP-167/KELT-13</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/2M1207b" title="2M1207b">2M1207b</a></li> <li><a href="/wiki/B_Centauri_b" title="B Centauri b">b Centauri b</a></li> <li><a href="/wiki/HD_102117_b" title="HD 102117 b">HD 102117 b</a></li> <li><a href="/wiki/HD_103197_b" title="HD 103197 b">HD 103197 b</a></li> <li><a href="/wiki/HD_109749_b" title="HD 109749 b">HD 109749 b</a></li> <li><a href="/wiki/HD_101930_b" title="HD 101930 b">HD 101930 b</a></li> <li><a href="/wiki/HD_113538_b" title="HD 113538 b">HD 113538 b</a></li> <li><a href="/wiki/HD_113538_c" title="HD 113538 c">c</a></li> <li><a href="/wiki/HD_114386_b" title="HD 114386 b">HD 114386 b</a></li> <li><a href="/wiki/HD_114729_b" title="HD 114729 b">HD 114729 b</a></li> <li><a href="/wiki/HD_117207_b" title="HD 117207 b">HD 117207 b</a></li> <li><a href="/wiki/HD_117618_b" title="HD 117618 b">HD 117618 b</a></li> <li><a href="/wiki/HD_121504_b" title="HD 121504 b">HD 121504 b</a></li> <li><a href="/wiki/HIP_65426_b" title="HIP 65426 b">HIP 65426 b</a></li> <li><a href="/wiki/HIP_67522_b" title="HIP 67522 b">HIP 67522 b</a></li> <li><a href="/wiki/Proxima_Centauri_b" title="Proxima Centauri b">Proxima Centauri b</a></li> <li><a href="/wiki/Proxima_Centauri_c" title="Proxima Centauri c">c</a></li> <li><a href="/wiki/Proxima_Centauri_d" title="Proxima Centauri d">d</a></li> <li><a href="/wiki/WASP-15b" title="WASP-15b">WASP-15b</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/IC_2944" title="IC 2944">IC 2944</a></li> <li><a href="/wiki/NGC_3766" title="NGC 3766">NGC 3766</a></li> <li><a href="/wiki/NGC_4230" title="NGC 4230">NGC 4230</a></li> <li><a href="/wiki/NGC_5286" title="NGC 5286">NGC 5286</a></li> <li><a href="/wiki/NGC_5281" title="NGC 5281">NGC 5281</a></li> <li><a href="/wiki/NGC_5316" title="NGC 5316">NGC 5316</a></li> <li><a href="/wiki/NGC_5460" title="NGC 5460">NGC 5460</a></li> <li><a href="/wiki/NGC_5617" title="NGC 5617">NGC 5617</a></li> <li><a href="/wiki/NGC_5662" title="NGC 5662">NGC 5662</a></li> <li><a href="/wiki/Omega_Centauri" title="Omega Centauri">ω</a></li> <li><a href="/wiki/Scorpius%E2%80%93Centaurus_association" title="Scorpius–Centaurus association">Scorpius–Centaurus association</a></li> <li><a href="/wiki/Stock_16" title="Stock 16">Stock 16</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/Boomerang_Nebula" title="Boomerang Nebula">Boomerang Nebula</a></li> <li><a href="/wiki/Fleming_1" title="Fleming 1">Fleming 1</a></li> <li><a href="/wiki/G292.0%2B01.8" title="G292.0+01.8">G292.0+1.8</a></li> <li><a href="/wiki/IC_2944" title="IC 2944">IC 2944</a></li> <li><a href="/wiki/NGC_3918" title="NGC 3918">NGC 3918</a></li> <li><a href="/wiki/NGC_5307" title="NGC 5307">NGC 5307</a></li> <li><a href="/wiki/RCW_79" title="RCW 79">RCW 79</a></li> <li><a href="/wiki/Southern_Crab_Nebula" title="Southern Crab Nebula">Southern Crab Nebula</a></li> <li><a href="/wiki/SN_185" title="SN 185">SN 185</a> <small>(RCW 86)</small></li> <li><a href="/wiki/SuWt_2" title="SuWt 2">SuWt 2</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_3783" title="NGC 3783">3783</a></li> <li><a href="/wiki/NGC_4444" title="NGC 4444">4444</a></li> <li><a href="/wiki/NGC_4603" title="NGC 4603">4603</a></li> <li><a href="/wiki/NGC_4622" title="NGC 4622">4622</a></li> <li><a href="/wiki/NGC_4650A" title="NGC 4650A">4650A</a></li> <li><a href="/wiki/NGC_4683" title="NGC 4683">4683</a></li> <li><a href="/wiki/NGC_4696" title="NGC 4696">4696</a></li> <li><a href="/wiki/NGC_4706" title="NGC 4706">4706</a></li> <li><a href="/wiki/NGC_4709" title="NGC 4709">4709</a></li> <li><a href="/wiki/NGC_4729" title="NGC 4729">4729</a></li> <li><a href="/wiki/NGC_4730" title="NGC 4730">4730</a></li> <li><a href="/wiki/NGC_4743" title="NGC 4743">4743</a></li> <li><a href="/wiki/NGC_4744" title="NGC 4744">4744</a></li> <li><a href="/wiki/NGC_4945" title="NGC 4945">4945</a></li> <li><a href="/wiki/NGC_4976" title="NGC 4976">4976</a></li> <li><a href="/wiki/NGC_5011" title="NGC 5011">5011</a> <ul><li><a href="/wiki/NGC_5011A" class="mw-redirect" title="NGC 5011A">A</a></li></ul></li> <li><a href="/wiki/NGC_5026" title="NGC 5026">5026</a></li> <li><a href="/wiki/NGC_5090_and_NGC_5091" title="NGC 5090 and NGC 5091">5090</a></li> <li><a href="/wiki/NGC_5090_and_NGC_5091" title="NGC 5090 and NGC 5091">5091</a></li> <li><a href="/wiki/NGC_5102" title="NGC 5102">5102</a></li> <li><a href="/wiki/NGC_5114" title="NGC 5114">5114</a></li> <li><a href="/wiki/Centaurus_A" title="Centaurus A">5128 (Centaurus A)</a></li> <li><a href="/wiki/NGC_5161" title="NGC 5161">5161</a></li> <li><a href="/wiki/NGC_5253" title="NGC 5253">5253</a></li> <li><a href="/wiki/NGC_5291" title="NGC 5291">5291</a></li> <li><a href="/wiki/NGC_5398" title="NGC 5398">5398</a></li> <li><a href="/wiki/NGC_5408" title="NGC 5408">5408</a></li> <li><a href="/wiki/NGC_5419" title="NGC 5419">5419</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/ESO_269-57" title="ESO 269-57">ESO 269-57</a></li> <li><a href="/wiki/ESO_325-G004" class="mw-redirect" title="ESO 325-G004">ESO 325-G004</a></li> <li><a href="/wiki/ESO_383-76" title="ESO 383-76">ESO 383-76</a></li> <li><a href="/wiki/ESO_444-46" title="ESO 444-46">ESO 444-46</a></li> <li><a href="/wiki/Fourcade-Figueroa_Object" title="Fourcade-Figueroa Object">Fourcade-Figueroa Object</a></li> <li><a href="/wiki/IRAS_13224-3809" title="IRAS 13224-3809">IRAS 13224-3809</a></li> <li><a href="/wiki/PKS_1144-379" title="PKS 1144-379">PKS 1144-379</a></li> <li><a href="/wiki/PKS_1353%E2%88%92341" title="PKS 1353−341">PKS 1353−341</a></li> <li><a href="/wiki/PKS_1424-418" title="PKS 1424-418">PKS 1424-418</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_S740" title="Abell S740">Abell S740</a></li> <li><a href="/wiki/Shapley_Supercluster" title="Shapley Supercluster">Shapley 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 href="/wiki/SN_185" title="SN 185">SN 185</a></li> <li><a href="/wiki/SN_1895B" title="SN 1895B">SN 1895B</a></li> <li><a href="/wiki/SN_1986G" title="SN 1986G">SN 1986G</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:Centaurus" title="Category:Centaurus">Category</a></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> 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