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class="noprint">From Wikipedia, the free encyclopedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><div class="shortdescription nomobile noexcerpt noprint searchaux" style="display:none">Star in the constellation Cygnus</div> <table class="infobox" style="width: 22em; font-size: 88%; line-height: 1.5em"> <caption style="font-size: 125%; font-weight: bold">23 Cygni </caption> <tbody><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/Cygnus_(constellation)" title="Cygnus (constellation)">Cygnus</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">19<sup>h</sup> 53<sup>m</sup> 17.37873<sup>s</sup></span><sup id="cite_ref-GaiaDR2_1-0" class="reference"><a href="#cite_note-GaiaDR2-1"><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>+57° 31′ 24.4810″<sup id="cite_ref-GaiaDR2_1-1" class="reference"><a href="#cite_note-GaiaDR2-1"><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>5.14<sup id="cite_ref-Fitzpatrick2005_2-0" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><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>B5 V<sup id="cite_ref-Hill1977_3-0" class="reference"><a href="#cite_note-Hill1977-3"><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>+0.76<sup id="cite_ref-Fitzpatrick2005_2-1" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<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>−0.13<sup id="cite_ref-Fitzpatrick2005_2-2" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><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="2998684000000000000♠"></span>−31.6<span style="margin-left:0.3em;margin-right:0.15em;">±</span>1.6</span><sup id="cite_ref-Gontcharov2006_4-0" class="reference"><a href="#cite_note-Gontcharov2006-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup><span class="nowrap"> km/s</span></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> +5.768<sup id="cite_ref-GaiaDR2_1-2" class="reference"><a href="#cite_note-GaiaDR2-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><span class="nowrap"> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a></span> <br /> <abbr title="Declination">Dec.:</abbr> +11.483<sup id="cite_ref-GaiaDR2_1-3" class="reference"><a href="#cite_note-GaiaDR2-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup><span class="nowrap"> <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a>/<a href="/wiki/Year" title="Year">yr</a></span> </td></tr><tr style="vertical-align:top;"><td><b><a href="/wiki/Stellar_parallax" title="Stellar parallax">Parallax</a> (π)</b></td><td>5.9155<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.1728 <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a><sup id="cite_ref-GaiaDR2_1-4" class="reference"><a href="#cite_note-GaiaDR2-1"><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>550 ± 20 <a href="/wiki/Light-year" title="Light-year">ly</a> <br />(169 ± 5 <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>−1.30<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<sup id="cite_ref-Fitzpatrick2005_2-3" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup></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="7000470000000000000♠"></span>4.7<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;">+0.64<br />−0.53</span></span></span><sup id="cite_ref-Kraus2016_6-0" class="reference"><a href="#cite_note-Kraus2016-6"><span class="cite-bracket">[</span>6<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="7000430000000000000♠"></span>4.30<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.45</span> <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>611.53<sup id="cite_ref-Anderson2012_5-1" class="reference"><a href="#cite_note-Anderson2012-5"><span class="cite-bracket">[</span>5<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="7000382000000000000♠"></span>3.82<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.08</span> <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="7004148930000000000♠"></span>14,893<span style="margin-left:0.3em;margin-right:0.15em;">±</span>214</span> <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="3000830000000000000♠"></span>−0.17<span style="margin-left:0.3em;margin-right:0.15em;">±</span>0.16</span> <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/Projected_rotational_velocity" class="mw-redirect" title="Projected rotational velocity">Rotational velocity</a> (<i>v</i> sin <i>i</i>)</b></td><td>145 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="7001260000000000000♠"></span>26<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;">+32<br />−19</span></span></span><sup id="cite_ref-Kraus2016_6-1" class="reference"><a href="#cite_note-Kraus2016-6"><span class="cite-bracket">[</span>6<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"></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"><a href="/wiki/Flamsteed_designation" title="Flamsteed designation">23 Cyg</a>, <span class="nowrap"><a href="/wiki/Bonner_Durchmusterung" class="mw-redirect" title="Bonner Durchmusterung">BD</a>+57°2084</span>, <span class="nowrap"><a href="/wiki/Henry_Draper_Catalogue" title="Henry Draper Catalogue">HD</a> 188665</span>, <span class="nowrap"><a href="/wiki/Hipparcos_Catalogue" class="mw-redirect" title="Hipparcos Catalogue">HIP</a> 97870</span>, <span class="nowrap"><a href="/wiki/Harvard_Revised_catalogue" class="mw-redirect" title="Harvard Revised catalogue">HR</a> 7608</span>, <span class="nowrap"><a href="/wiki/Smithsonian_Astrophysical_Observatory_Star_Catalog" title="Smithsonian Astrophysical Observatory Star Catalog">SAO</a> 32085</span>, <span class="nowrap"><a href="/wiki/Washington_Double_Star_Catalog" title="Washington Double Star Catalog">WDS</a> J19533+5731</span><sup id="cite_ref-SIMBAD_7-0" class="reference"><a href="#cite_note-SIMBAD-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup></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=23+Cyg">data</a></td></tr> </tbody></table> <p><b>23 Cygni</b> is a single,<sup id="cite_ref-Fitzpatrick2005_2-4" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> blue-white hued <a href="/wiki/Star" title="Star">star</a> in the northern <a href="/wiki/Constellation" title="Constellation">constellation</a> <a href="/wiki/Cygnus_(constellation)" title="Cygnus (constellation)">Cygnus</a>. It is a faint star, visible to the naked eye, with an <a href="/wiki/Apparent_visual_magnitude" class="mw-redirect" title="Apparent visual magnitude">apparent visual magnitude</a> of 5.14.<sup id="cite_ref-Fitzpatrick2005_2-5" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The distance to this star, as estimated from its annual <a href="/wiki/Stellar_parallax" title="Stellar parallax">parallax shift</a> of <span class="nowrap"><span data-sort-value="6992286040071854626♠"></span>5.9 <a href="/wiki/Milliarcsecond" class="mw-redirect" title="Milliarcsecond">mas</a></span>,<sup id="cite_ref-GaiaDR2_1-5" class="reference"><a href="#cite_note-GaiaDR2-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> is about 550 <a href="/wiki/Light_year" class="mw-redirect" title="Light year">light years</a>. It is moving closer to the Earth with a heliocentric <a href="/wiki/Radial_velocity" title="Radial velocity">radial velocity</a> of −32 km/s,<sup id="cite_ref-Gontcharov2006_4-1" class="reference"><a href="#cite_note-Gontcharov2006-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> and is expected to come as near as 166 light-years in around 5.6 million years.<sup id="cite_ref-Fitzpatrick2005_2-6" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> At that distance, the current star would be of magnitude 2.24.<sup id="cite_ref-magnitude_8-0" class="reference"><a href="#cite_note-magnitude-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p><p>This is an ordinary <a href="/wiki/B-type_main-sequence_star" title="B-type main-sequence star">B-type main-sequence star</a> of spectral type B5V, a star that is generating energy through <a href="/wiki/Hydrogen_fusion" class="mw-redirect" title="Hydrogen fusion">hydrogen fusion</a> at its <a href="/wiki/Stellar_core" title="Stellar core">core</a>. It is roughly 26<sup id="cite_ref-Fitzpatrick2005_2-7" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> million years old with 4.7<sup id="cite_ref-Kraus2016_6-2" class="reference"><a href="#cite_note-Kraus2016-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> times the <a href="/wiki/Mass_of_the_Sun" class="mw-redirect" title="Mass of the Sun">mass of the Sun</a> and 4.3 times the <a href="/wiki/Sun%27s_radius" class="mw-redirect" title="Sun's radius">Sun's radius</a>.<sup id="cite_ref-Fitzpatrick2005_2-8" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> The star has a high rate of spin, having a <a href="/wiki/Projected_rotational_velocity" class="mw-redirect" title="Projected rotational velocity">projected rotational velocity</a> of 145 km/s.<sup id="cite_ref-Fitzpatrick2005_2-9" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> It is radiating 612<sup id="cite_ref-Anderson2012_5-2" class="reference"><a href="#cite_note-Anderson2012-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> times the <a href="/wiki/Sun%27s_luminosity" class="mw-redirect" title="Sun's luminosity">Sun's luminosity</a> from its <a href="/wiki/Photosphere" title="Photosphere">photosphere</a> at an <a href="/wiki/Effective_temperature" title="Effective temperature">effective temperature</a> of 14,893 K.<sup id="cite_ref-Fitzpatrick2005_2-10" class="reference"><a href="#cite_note-Fitzpatrick2005-2"><span class="cite-bracket">[</span>2<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=23_Cygni&action=edit&section=1" 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"><ol class="references"> <li id="cite_note-GaiaDR2-1"><span class="mw-cite-backlink">^ <a href="#cite_ref-GaiaDR2_1-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-GaiaDR2_1-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-GaiaDR2_1-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-GaiaDR2_1-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-GaiaDR2_1-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-GaiaDR2_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="CITEREFBrown2018" class="citation journal cs1"><a href="/wiki/Anthony_Brown_(scientist)" title="Anthony Brown (scientist)">Brown, A. G. A.</a>; et al. (Gaia collaboration) (August 2018). <a rel="nofollow" class="external text" href="https://doi.org/10.1051%2F0004-6361%2F201833051">"<i>Gaia</i> Data Release 2: Summary of the contents and survey properties"</a>. <i><a href="/wiki/Astronomy_%26_Astrophysics" title="Astronomy & Astrophysics">Astronomy & Astrophysics</a></i>. <b>616</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/1804.09365">1804.09365</a></span>. <a href="/wiki/Bibcode_(identifier)" class="mw-redirect" title="Bibcode (identifier)">Bibcode</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://ui.adsabs.harvard.edu/abs/2018A&A...616A...1G">2018A&A...616A...1G</a></span>. <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%2F201833051">10.1051/0004-6361/201833051</a></span>.</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+Data+Release+2%3A+Summary+of+the+contents+and+survey+properties&rft.volume=616&rft.pages=A1&rft.date=2018-08&rft_id=info%3Aarxiv%2F1804.09365&rft_id=info%3Adoi%2F10.1051%2F0004-6361%2F201833051&rft_id=info%3Abibcode%2F2018A%26A...616A...1G&rft.aulast=Brown&rft.aufirst=A.+G.+A.&rft_id=https%3A%2F%2Fdoi.org%2F10.1051%252F0004-6361%252F201833051&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span> <a rel="nofollow" class="external text" href="http://vizier.u-strasbg.fr/viz-bin/VizieR-S?Gaia%20DR2%202235104382453048320">Gaia DR2 record for this source</a> at <a href="/wiki/VizieR" title="VizieR">VizieR</a>.</span> </li> <li id="cite_note-Fitzpatrick2005-2"><span class="mw-cite-backlink">^ <a href="#cite_ref-Fitzpatrick2005_2-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-2"><sup><i><b>c</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-3"><sup><i><b>d</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-4"><sup><i><b>e</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-5"><sup><i><b>f</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-6"><sup><i><b>g</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-7"><sup><i><b>h</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-8"><sup><i><b>i</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-9"><sup><i><b>j</b></i></sup></a> <a href="#cite_ref-Fitzpatrick2005_2-10"><sup><i><b>k</b></i></sup></a></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFFitzpatrickMassa2005" class="citation cs2">Fitzpatrick, E. L.; Massa, D. (March 2005), "Determining the Physical Properties of the B Stars. II. Calibration of Synthetic Photometry", <i>The Astronomical Journal</i>, <b>129</b> (3): <span class="nowrap">1642–</span>1662, <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/astro-ph/0412542">astro-ph/0412542</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/2005AJ....129.1642F">2005AJ....129.1642F</a>, <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1086%2F427855">10.1086/427855</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:119512018">119512018</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=Determining+the+Physical+Properties+of+the+B+Stars.+II.+Calibration+of+Synthetic+Photometry&rft.volume=129&rft.issue=3&rft.pages=%3Cspan+class%3D%22nowrap%22%3E1642-%3C%2Fspan%3E1662&rft.date=2005-03&rft_id=info%3Aarxiv%2Fastro-ph%2F0412542&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A119512018%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1086%2F427855&rft_id=info%3Abibcode%2F2005AJ....129.1642F&rft.aulast=Fitzpatrick&rft.aufirst=E.+L.&rft.au=Massa%2C+D.&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span></span> </li> <li id="cite_note-Hill1977-3"><span class="mw-cite-backlink"><b><a href="#cite_ref-Hill1977_3-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFHillLynas-Gray1977" class="citation cs2">Hill, P. W.; Lynas-Gray, A. E. (September 1977), "UBV photometry and MK spectral classification of northern early-type stars at intermediate galactic latitudes.", <i>Monthly Notices of the Royal Astronomical Society</i>, <b>180</b> (4): <span class="nowrap">691–</span>702, <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/1977MNRAS.180..691H">1977MNRAS.180..691H</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/10.1093%2Fmnras%2F180.4.691">10.1093/mnras/180.4.691</a></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Monthly+Notices+of+the+Royal+Astronomical+Society&rft.atitle=UBV+photometry+and+MK+spectral+classification+of+northern+early-type+stars+at+intermediate+galactic+latitudes.&rft.volume=180&rft.issue=4&rft.pages=%3Cspan+class%3D%22nowrap%22%3E691-%3C%2Fspan%3E702&rft.date=1977-09&rft_id=info%3Adoi%2F10.1093%2Fmnras%2F180.4.691&rft_id=info%3Abibcode%2F1977MNRAS.180..691H&rft.aulast=Hill&rft.aufirst=P.+W.&rft.au=Lynas-Gray%2C+A.+E.&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span></span> </li> <li id="cite_note-Gontcharov2006-4"><span class="mw-cite-backlink">^ <a href="#cite_ref-Gontcharov2006_4-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Gontcharov2006_4-1"><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="CITEREFGontcharov2006" class="citation cs2">Gontcharov, G. A. (2006), "Pulkovo Compilation of Radial Velocities for 35 495 Hipparcos stars in a common system", <i>Astronomy Letters</i>, <b>32</b> (11): <span class="nowrap">759–</span>771, <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/1606.08053">1606.08053</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/2006AstL...32..759G">2006AstL...32..759G</a>, <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1134%2FS1063773706110065">10.1134/S1063773706110065</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:119231169">119231169</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+Letters&rft.atitle=Pulkovo+Compilation+of+Radial+Velocities+for+35+495+Hipparcos+stars+in+a+common+system&rft.volume=32&rft.issue=11&rft.pages=%3Cspan+class%3D%22nowrap%22%3E759-%3C%2Fspan%3E771&rft.date=2006&rft_id=info%3Aarxiv%2F1606.08053&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A119231169%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1134%2FS1063773706110065&rft_id=info%3Abibcode%2F2006AstL...32..759G&rft.aulast=Gontcharov&rft.aufirst=G.+A.&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span></span> </li> <li id="cite_note-Anderson2012-5"><span class="mw-cite-backlink">^ <a href="#cite_ref-Anderson2012_5-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Anderson2012_5-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Anderson2012_5-2"><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="CITEREFAndersonFrancis2012" class="citation cs2">Anderson, E.; Francis, Ch. (2012), "XHIP: An extended hipparcos compilation", <i>Astronomy Letters</i>, <b>38</b> (5): 331, <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/1108.4971">1108.4971</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/2012AstL...38..331A">2012AstL...38..331A</a>, <a href="/wiki/Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.1134%2FS1063773712050015">10.1134/S1063773712050015</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:119257644">119257644</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Astronomy+Letters&rft.atitle=XHIP%3A+An+extended+hipparcos+compilation&rft.volume=38&rft.issue=5&rft.pages=331&rft.date=2012&rft_id=info%3Aarxiv%2F1108.4971&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A119257644%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.1134%2FS1063773712050015&rft_id=info%3Abibcode%2F2012AstL...38..331A&rft.aulast=Anderson&rft.aufirst=E.&rft.au=Francis%2C+Ch.&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span></span> </li> <li id="cite_note-Kraus2016-6"><span class="mw-cite-backlink">^ <a href="#cite_ref-Kraus2016_6-0"><sup><i><b>a</b></i></sup></a> <a href="#cite_ref-Kraus2016_6-1"><sup><i><b>b</b></i></sup></a> <a href="#cite_ref-Kraus2016_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="CITEREFGulliksonKrausDodson-Robinson2016" class="citation cs2">Gullikson, Kevin; et al. (August 2016), "The Close Companion Mass-ratio Distribution of Intermediate-mass Stars", <i>The Astronomical Journal</i>, <b>152</b> (2): 13, <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/1604.06456">1604.06456</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/2016AJ....152...40G">2016AJ....152...40G</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%2F0004-6256%2F152%2F2%2F40">10.3847/0004-6256/152/2/40</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:119179065">119179065</a>, 40.</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=The+Close+Companion+Mass-ratio+Distribution+of+Intermediate-mass+Stars&rft.volume=152&rft.issue=2&rft.pages=13&rft.date=2016-08&rft_id=info%3Aarxiv%2F1604.06456&rft_id=https%3A%2F%2Fapi.semanticscholar.org%2FCorpusID%3A119179065%23id-name%3DS2CID&rft_id=info%3Adoi%2F10.3847%2F0004-6256%2F152%2F2%2F40&rft_id=info%3Abibcode%2F2016AJ....152...40G&rft.aulast=Gullikson&rft.aufirst=Kevin&rft.au=Kraus%2C+Adam&rft.au=Dodson-Robinson%2C+Sarah&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span></span> </li> <li id="cite_note-SIMBAD-7"><span class="mw-cite-backlink"><b><a href="#cite_ref-SIMBAD_7-0">^</a></b></span> <span class="reference-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite class="citation web cs1"><a rel="nofollow" class="external text" href="http://simbad.u-strasbg.fr/simbad/sim-basic?Ident=23+Cyg">"23 Cyg"</a>. <i><a href="/wiki/SIMBAD" title="SIMBAD">SIMBAD</a></i>. <a href="/wiki/Centre_de_donn%C3%A9es_astronomiques_de_Strasbourg" title="Centre de données astronomiques de Strasbourg">Centre de données astronomiques de Strasbourg</a><span class="reference-accessdate">. Retrieved <span class="nowrap">2019-01-09</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=SIMBAD&rft.atitle=23+Cyg&rft_id=http%3A%2F%2Fsimbad.u-strasbg.fr%2Fsimbad%2Fsim-basic%3FIdent%3D23%2BCyg&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span></span> </li> <li id="cite_note-magnitude-8"><span class="mw-cite-backlink"><b><a href="#cite_ref-magnitude_8-0">^</a></b></span> <span class="reference-text">At a distance (D) of 50.99 and an absolute magnitude (M) of −1.30, ignoring <a href="/wiki/Extinction_(astronomy)" title="Extinction (astronomy)">extinction</a> (A), the apparent magnitude (m) would be: <dl><dd>m = M + A + 5·<i>log</i> D + 5 ≈ −1.30 + 5·<i>log</i> 50.99 − 5 = 2.24</dd></dl> Ref.: <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1238218222" /><cite id="CITEREFDopitaSutherland2004" class="citation cs2">Dopita, Michael A.; Sutherland, Ralph S. (2004), <a rel="nofollow" class="external text" href="https://books.google.com/books?id=kWzLAlkBqAAC&pg=PA296"><i>Astrophysics of the Diffuse Universe</i></a>, Astronomy and Astrophysics Library, Springer Science & Business Media, p. 296, <a href="/wiki/ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <a href="/wiki/Special:BookSources/3540433627" title="Special:BookSources/3540433627"><bdi>3540433627</bdi></a></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Astrophysics+of+the+Diffuse+Universe&rft.series=Astronomy+and+Astrophysics+Library&rft.pages=296&rft.pub=Springer+Science+%26+Business+Media&rft.date=2004&rft.isbn=3540433627&rft.aulast=Dopita&rft.aufirst=Michael+A.&rft.au=Sutherland%2C+Ralph+S.&rft_id=https%3A%2F%2Fbooks.google.com%2Fbooks%3Fid%3DkWzLAlkBqAAC%26pg%3DPA296&rfr_id=info%3Asid%2Fen.wikipedia.org%3A23+Cygni" class="Z3988"></span></span> </li> </ol></div></div> <div 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Cygnus</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_Cygnus" title="List of stars in Cygnus">List of stars in Cygnus</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Star" title="Star">Stars</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:6em"><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/Deneb" title="Deneb">α (Deneb)</a></li> <li><a href="/wiki/Albireo" title="Albireo">β (Albireo)</a></li> <li><a href="/wiki/Gamma_Cygni" title="Gamma Cygni">γ (Sadr)</a></li> <li><a href="/wiki/Delta_Cygni" title="Delta Cygni">δ (Fawaris)</a></li> <li><a href="/wiki/Epsilon_Cygni" title="Epsilon Cygni">ε (Aljanah)</a></li> <li><a href="/wiki/Zeta_Cygni" title="Zeta Cygni">ζ</a></li> <li><a href="/wiki/Eta_Cygni" title="Eta Cygni">η</a></li> <li><a href="/wiki/Theta_Cygni" title="Theta Cygni">θ</a></li> <li><a href="/wiki/Iota1_Cygni" title="Iota1 Cygni">ι<sup>1</sup></a></li> <li><a href="/wiki/Iota2_Cygni" title="Iota2 Cygni">ι<sup>2</sup></a></li> <li><a href="/wiki/Kappa_Cygni" title="Kappa Cygni">κ</a></li> <li><a href="/wiki/Lambda_Cygni" title="Lambda Cygni">λ</a></li> <li><a href="/wiki/Mu_Cygni" title="Mu Cygni">μ</a></li> <li><a href="/wiki/Nu_Cygni" title="Nu Cygni">ν</a></li> <li><a href="/wiki/Xi_Cygni" title="Xi Cygni">ξ</a></li> <li><a href="/wiki/30_Cygni" title="30 Cygni">o<sup>1</sup></a></li> <li><a href="/wiki/31_Cygni" title="31 Cygni">o<sup>2</sup></a></li> <li><a href="/wiki/32_Cygni" title="32 Cygni">ο<sup>3</sup></a></li> <li><a href="/wiki/Pi1_Cygni" title="Pi1 Cygni">π<sup>1</sup> (Azelfafage)</a></li> <li><a href="/wiki/Pi2_Cygni" title="Pi2 Cygni">π<sup>2</sup></a></li> <li><a href="/wiki/Rho_Cygni" title="Rho Cygni">ρ</a></li> <li><a href="/wiki/Sigma_Cygni" title="Sigma Cygni">σ</a></li> <li><a href="/wiki/Tau_Cygni" title="Tau Cygni">τ</a></li> <li><a href="/wiki/Upsilon_Cygni" title="Upsilon Cygni">υ</a></li> <li><a href="/wiki/Phi_Cygni" title="Phi Cygni">φ</a></li> <li><a href="/wiki/Chi_Cygni" title="Chi Cygni">χ</a></li> <li><a href="/wiki/Psi_Cygni" title="Psi Cygni">ψ</a></li> <li><a href="/wiki/Omega1_Cygni" title="Omega1 Cygni">ω<sup>1</sup></a></li> <li><a href="/wiki/Omega2_Cygni" title="Omega2 Cygni">ω<sup>2</sup></a></li> <li><a href="/wiki/P_Cygni" title="P Cygni">P</a></li> <li><a href="/wiki/Q_Cygni" title="Q Cygni">Q</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><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/2_Cygni" title="2 Cygni">2</a></li> <li><a href="/wiki/4_Cygni" title="4 Cygni">4</a></li> <li><a href="/wiki/8_Cygni" title="8 Cygni">8</a></li> <li><a href="/wiki/9_Cygni" title="9 Cygni">9</a></li> <li><a href="/wiki/15_Cygni" title="15 Cygni">15</a></li> <li><a href="/wiki/16_Cygni" title="16 Cygni">16 (c)</a></li> <li><a href="/wiki/17_Cygni" title="17 Cygni">17</a></li> <li><a href="/wiki/20_Cygni" title="20 Cygni">20 (d)</a></li> <li><a href="/wiki/22_Cygni" title="22 Cygni">22</a></li> <li><a class="mw-selflink selflink">23</a></li> <li><a href="/wiki/26_Cygni" title="26 Cygni">26 (e)</a></li> <li><a href="/wiki/27_Cygni" title="27 Cygni">27 (b<sup>1</sup>)</a></li> <li><a href="/wiki/28_Cygni" title="28 Cygni">28 (b<sup>2</sup>)</a></li> <li><a href="/wiki/29_Cygni" title="29 Cygni">29 (b<sup>3</sup>)</a></li> <li><a href="/wiki/33_Cygni" title="33 Cygni">33</a></li> <li><a href="/wiki/35_Cygni" title="35 Cygni">35</a></li> <li><a href="/wiki/39_Cygni" title="39 Cygni">39</a></li> <li><a href="/wiki/41_Cygni" title="41 Cygni">41</a></li> <li><a href="/wiki/47_Cygni" title="47 Cygni">47</a></li> <li><a href="/wiki/52_Cygni" title="52 Cygni">52</a></li> <li><a href="/wiki/55_Cygni" title="55 Cygni">55</a></li> <li><a href="/wiki/56_Cygni" title="56 Cygni">56</a></li> <li><a href="/wiki/57_Cygni" title="57 Cygni">57</a></li> <li><a href="/wiki/59_Cygni" title="59 Cygni">59 (f<sup>1</sup>)</a></li> <li><a href="/wiki/61_Cygni" title="61 Cygni">61</a></li> <li><a href="/wiki/63_Cygni" title="63 Cygni">63 (f<sup>2</sup>)</a></li> <li><a href="/wiki/68_Cygni" title="68 Cygni">68 (A)</a></li> <li><a href="/wiki/71_Cygni" title="71 Cygni">71 (g)</a></li> <li><a href="/wiki/72_Cygni" title="72 Cygni">72</a></li> <li><a href="/wiki/74_Cygni" title="74 Cygni">74</a></li> <li><a href="/wiki/75_Cygni" title="75 Cygni">75</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><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_Cygni" title="R Cygni">R</a></li> <li><a href="/wiki/T_Cygni" title="T Cygni">T</a></li> <li><a href="/wiki/W_Cygni" title="W Cygni">W</a></li> <li><a href="/wiki/X_Cygni" title="X Cygni">X</a></li> <li><a href="/wiki/Y_Cygni" title="Y Cygni">Y</a></li> <li><a href="/wiki/RW_Cygni" title="RW Cygni">RW</a></li> <li><a href="/wiki/SS_Cygni" title="SS Cygni">SS</a></li> <li><a href="/wiki/SU_Cygni" title="SU Cygni">SU</a></li> <li><a href="/wiki/TT_Cygni" title="TT Cygni">TT</a></li> <li><a href="/wiki/AZ_Cygni" title="AZ Cygni">AZ</a></li> <li><a href="/wiki/BC_Cygni" title="BC Cygni">BC</a></li> <li><a href="/wiki/BI_Cygni" title="BI Cygni">BI</a></li> <li><a href="/wiki/CH_Cygni" title="CH Cygni">CH</a></li> <li><a href="/wiki/KY_Cygni" title="KY Cygni">KY</a></li> <li><a href="/wiki/V380_Cygni" title="V380 Cygni">V380</a></li> <li><a href="/wiki/V389_Cygni" title="V389 Cygni">V389</a></li> <li><a href="/wiki/V404_Cygni" title="V404 Cygni">V404</a></li> <li><a href="/wiki/V476_Cygni" title="V476 Cygni">V476</a></li> <li><a href="/wiki/V1027_Cygni" title="V1027 Cygni">V1027</a></li> <li><a href="/wiki/V1057_Cygni" title="V1057 Cygni">V1057</a></li> <li><a href="/wiki/HR_7484" title="HR 7484">V1143</a></li> <li><a href="/wiki/V1191_Cygni" title="V1191 Cygni">V1191</a></li> <li><a href="/wiki/V1334_Cygni" title="V1334 Cygni">V1334</a></li> <li><a href="/wiki/NML_Cygni" title="NML Cygni">V1489</a></li> <li><a href="/wiki/V1500_Cygni" title="V1500 Cygni">V1500</a></li> <li><a href="/wiki/V1668_Cygni" title="V1668 Cygni">V1668</a></li> <li><a href="/wiki/V1794_Cygni" title="V1794 Cygni">V1794</a></li> <li><a href="/wiki/V1974_Cygni" title="V1974 Cygni">V1974</a></li> <li><a href="/wiki/KPD_1930%2B2752" title="KPD 1930+2752">V2214</a></li> <li><a href="/wiki/IRAS_19475%2B3119" title="IRAS 19475+3119">V2513</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><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_189276" title="HD 189276">7633</a></li> <li><a href="/wiki/HD_193322" title="HD 193322">7767</a></li> <li><a href="/wiki/HD_197036" title="HD 197036">7912</a></li> <li><a href="/wiki/HD_203857" title="HD 203857">8193</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><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_185269" title="HD 185269">185269</a></li> <li><a href="/wiki/HD_185351" title="HD 185351">185351</a></li> <li><a href="/wiki/HD_187123" title="HD 187123">187123</a></li> <li><a href="/wiki/HD_188753" title="HD 188753">188753</a></li> <li><a href="/wiki/HD_190655" title="HD 190655">190655</a></li> <li><a href="/wiki/HD_191612" title="HD 191612">191612</a></li> <li><a href="/wiki/HD_191806" title="HD 191806">191806</a></li> <li><a href="/wiki/HD_197037" title="HD 197037">197037</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Gliese_Catalogue_of_Nearby_Stars" title="Gliese Catalogue of Nearby Stars">Gliese</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/Gliese_777" title="Gliese 777">777</a></li> <li><a href="/wiki/Gliese_806" title="Gliese 806">806</a></li> <li><a href="/wiki/GJ_1245" title="GJ 1245">1245</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/List_of_exoplanets_discovered_using_the_Kepler_space_telescope" class="mw-redirect" title="List of exoplanets discovered using the Kepler space telescope">Kepler</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/HAT-P-7" title="HAT-P-7">2</a></li> <li><a href="/wiki/HAT-P-11" title="HAT-P-11">3</a></li> <li><a href="/wiki/Kepler-5" title="Kepler-5">5</a></li> <li><a href="/wiki/Kepler-6" title="Kepler-6">6</a></li> <li><a href="/wiki/Kepler-11" title="Kepler-11">11</a></li> <li><a href="/wiki/Kepler-15" title="Kepler-15">15</a></li> <li><a href="/wiki/Kepler-16" title="Kepler-16">16</a></li> <li><a href="/wiki/Kepler-17" title="Kepler-17">17</a></li> <li><a href="/wiki/Kepler-18" title="Kepler-18">18</a></li> <li><a href="/wiki/Kepler-22" title="Kepler-22">22</a></li> <li><a href="/wiki/Kepler-23" title="Kepler-23">23</a></li> <li><a href="/wiki/Kepler-27" title="Kepler-27">27</a></li> <li><a href="/wiki/Kepler-28" title="Kepler-28">28</a></li> <li><a href="/wiki/Kepler-29" title="Kepler-29">29</a></li> <li><a href="/wiki/Kepler-31" title="Kepler-31">31</a></li> <li><a href="/wiki/Kepler-32" title="Kepler-32">32</a></li> <li><a href="/wiki/Kepler-33" title="Kepler-33">33</a></li> <li><a href="/wiki/Kepler-34" title="Kepler-34">34</a></li> <li><a href="/wiki/Kepler-35" title="Kepler-35">35</a></li> <li><a href="/wiki/Kepler-36" title="Kepler-36">36</a></li> <li><a href="/wiki/Kepler-39" title="Kepler-39">39</a></li> <li><a href="/wiki/Kepler-40" title="Kepler-40">40</a></li> <li><a href="/wiki/Kepler-41" title="Kepler-41">41</a></li> <li><a href="/wiki/Kepler-42" title="Kepler-42">42</a></li> <li><a href="/wiki/Kepler-43" title="Kepler-43">43</a></li> <li><a href="/wiki/Kepler-44" title="Kepler-44">44</a></li> <li><a href="/wiki/Kepler-45" title="Kepler-45">45</a></li> <li><a href="/wiki/Kepler-47" title="Kepler-47">47</a></li> <li><a href="/wiki/Kepler-51" title="Kepler-51">51</a></li> <li><a href="/wiki/Kepler-56" title="Kepler-56">56</a></li> <li><a href="/wiki/Kepler-61" title="Kepler-61">61</a></li> <li><a href="/wiki/Kepler-63" title="Kepler-63">63</a></li> <li><a href="/wiki/PH1" class="mw-redirect" title="PH1">64 (PH1)</a></li> <li><a href="/wiki/Kepler-66" title="Kepler-66">66</a></li> <li><a href="/wiki/Kepler-67" title="Kepler-67">67</a></li> <li><a href="/wiki/Kepler-68" title="Kepler-68">68</a></li> <li><a href="/wiki/Kepler-69" title="Kepler-69">69</a></li> <li><a href="/wiki/Kepler-70" title="Kepler-70">70</a></li> <li><a href="/wiki/Kepler-78" title="Kepler-78">78</a></li> <li><a href="/wiki/Kepler-80" title="Kepler-80">80</a></li> <li><a href="/wiki/Kepler-84" title="Kepler-84">84</a></li> <li><a href="/wiki/PH2" title="PH2">86 (PH2)</a></li> <li><a href="/wiki/Kepler-87" title="Kepler-87">87</a></li> <li><a href="/wiki/Kepler-89" title="Kepler-89">89</a></li> <li><a href="/wiki/Kepler-107" title="Kepler-107">107</a></li> <li><a href="/wiki/Kepler-167" title="Kepler-167">167</a></li> <li><a href="/wiki/Kepler-182" title="Kepler-182">182</a></li> <li><a href="/wiki/Kepler-186" title="Kepler-186">186</a></li> <li><a href="/wiki/Kepler-223" title="Kepler-223">223</a></li> <li><a href="/wiki/Kepler-289" title="Kepler-289">289</a></li> <li><a href="/wiki/Kepler-371" title="Kepler-371">371</a></li> <li><a href="/wiki/Kepler-385" title="Kepler-385">385</a></li> <li><a href="/wiki/Kepler-411" title="Kepler-411">411</a></li> <li><a href="/wiki/Kepler-419" title="Kepler-419">419</a></li> <li><a href="/wiki/Kepler-432" title="Kepler-432">432</a></li> <li><a href="/wiki/Kepler-445" title="Kepler-445">445</a></li> <li><a href="/wiki/2MASS_J19383260%2B4603591" class="mw-redirect" title="2MASS J19383260+4603591">451</a></li> <li><a href="/wiki/Kepler-452" title="Kepler-452">452</a></li> <li><a href="/wiki/Kepler-560" class="mw-redirect" title="Kepler-560">560</a></li> <li><a href="/wiki/Kepler-737" title="Kepler-737">737</a></li> <li><a href="/wiki/Kepler-1229" title="Kepler-1229">1229</a></li> <li><a href="/wiki/Kepler-1520" title="Kepler-1520">1520</a></li> <li><a href="/wiki/Kepler-1625" title="Kepler-1625">1625</a></li> <li><a href="/wiki/Kepler-1649" title="Kepler-1649">1649</a></li> <li><a href="/wiki/Kepler-1708" class="mw-redirect" title="Kepler-1708">1708</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Wolf-Rayet_star" class="mw-redirect" title="Wolf-Rayet star">WR</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/WR_133" title="WR 133">133</a></li> <li><a href="/wiki/WR_134" title="WR 134">134</a></li> <li><a href="/wiki/WR_135" title="WR 135">135</a></li> <li><a href="/wiki/WR_136" title="WR 136">136</a></li> <li><a href="/wiki/WR_137" title="WR 137">137</a></li> <li><a href="/wiki/WR_138a" title="WR 138a">138a</a></li> <li><a href="/wiki/WR_140" title="WR 140">140</a></li> <li><a href="/wiki/WR_142" title="WR 142">142</a></li> <li><a href="/wiki/WR_147" title="WR 147">147</a></li> <li><a href="/wiki/WR_148" title="WR 148">148</a></li> <li><a href="/wiki/WR_150" title="WR 150">150</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em">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/AFGL_2591" title="AFGL 2591">AFGL 2591</a></li> <li><a href="/wiki/BD%2B40%C2%B0_4210" class="mw-redirect" title="BD+40° 4210">BD+40° 4210</a></li> <li><a href="/wiki/BD%2B43_3654" title="BD+43 3654">BD+43 3654</a></li> <li><a href="/wiki/Cygnus_OB2-8A" title="Cygnus OB2-8A">Cygnus OB2 #8A</a></li> <li><a href="/wiki/Cygnus_OB2-12" title="Cygnus OB2-12">Cygnus OB2 #12</a></li> <li><a href="/wiki/Cygnus_X-1" title="Cygnus X-1">Cygnus X-1</a></li> <li><a href="/wiki/Cygnus_X-3" title="Cygnus X-3">Cygnus X-3</a></li> <li><a href="/wiki/G79.29%2B0.46" title="G79.29+0.46">G79.29+0.46</a></li> <li><a href="/wiki/G_208-44/208-45" class="mw-redirect" title="G 208-44/208-45">G 208-44</a></li> <li><a href="/wiki/G_208-44/208-45" class="mw-redirect" title="G 208-44/208-45">G 208-45</a></li> <li><a href="/wiki/GSC_03949-00967" title="GSC 03949-00967">GSC 03949-00967</a></li> <li><a href="/wiki/HAT-P-17" title="HAT-P-17">HAT-P-17</a></li> <li><a href="/wiki/KELT-9b#Host_star" title="KELT-9b">KELT-9</a></li> <li><a href="/wiki/KELT-20" title="KELT-20">KELT-20</a></li> <li><a href="/wiki/Tabby%27s_Star" title="Tabby's Star">KIC 8462852</a></li> <li><a href="/wiki/KIC_9832227" title="KIC 9832227">KIC 9832227</a></li> <li><a href="/wiki/KIC_9970396" title="KIC 9970396">KIC 9970396</a></li> <li><a href="/wiki/KIC_11026764" class="mw-redirect" title="KIC 11026764">KIC 11026764</a></li> <li><a href="/wiki/KIC_11145123" title="KIC 11145123">KIC 11145123</a></li> <li><a href="/wiki/KOI-5" title="KOI-5">KOI-5</a></li> <li><a href="/wiki/KOI-74" title="KOI-74">KOI-74</a></li> <li><a href="/wiki/KOI-81" title="KOI-81">KOI-81</a></li> <li><a href="/wiki/KOI-256" title="KOI-256">KOI-256</a></li> <li><a href="/wiki/MWC_349" title="MWC 349">MWC 349</a></li> <li><a href="/wiki/N6946-BH1" title="N6946-BH1">N6946-BH1</a></li> <li><a href="/wiki/PSR_J2032%2B4127" title="PSR J2032+4127">PSR J2032+4127</a></li> <li><a href="/wiki/SPECULOOS-3" title="SPECULOOS-3">SPECULOOS-3</a></li> <li><a href="/wiki/W75N(B)-VLA2" title="W75N(B)-VLA2">W75N(B)-VLA2</a></li> <li><a href="/wiki/WASP-48" title="WASP-48">WASP-48</a></li> <li><a href="/wiki/WISE_J2000%2B3629" title="WISE J2000+3629">WISE J2000+3629</a></li> <li><a href="/wiki/Wolf_1069" title="Wolf 1069">Wolf 1069</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Star_cluster" title="Star cluster">Star<br />clusters</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Stellar_association" title="Stellar association">Association</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/Cygnus_OB2" title="Cygnus OB2">Cygnus OB2</a></li> <li><a href="/wiki/Cygnus_OB7" title="Cygnus OB7">Cygnus OB7</a></li> <li><a href="/wiki/Cygnus_OB9" title="Cygnus OB9">Cygnus OB9</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Open_cluster" title="Open cluster">Open</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/Berkeley_86" title="Berkeley 86">Berkeley 86</a></li> <li><a href="/wiki/DR_6" title="DR 6">DR 6</a></li> <li><a href="/wiki/IC_5146" title="IC 5146">IC 5146</a></li> <li><a href="/wiki/Messier_29" title="Messier 29">Messier 29</a></li> <li><a href="/wiki/Messier_39" title="Messier 39">Messier 39</a></li> <li><a href="/wiki/NGC_6811" title="NGC 6811">NGC 6811</a></li> <li><a href="/wiki/NGC_6819" title="NGC 6819">NGC 6819</a></li> <li><a href="/wiki/NGC_6834" title="NGC 6834">NGC 6834</a></li> <li><a href="/wiki/NGC_6866" title="NGC 6866">NGC 6866</a></li> <li><a href="/wiki/NGC_6871" title="NGC 6871">NGC 6871</a></li> <li><a href="/wiki/NGC_6910" title="NGC 6910">NGC 6910</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Molecular_cloud" title="Molecular cloud">Molecular<br />clouds</a></th><td class="navbox-list-with-group navbox-list navbox-even" style="width:100%;padding:0"><div style="padding:0 0.25em"> <ul><li><a href="/wiki/Cygnus_Molecular_Nebula_Complex" title="Cygnus Molecular Nebula Complex">Cygnus Molecular Nebula Complex</a></li> <li><a href="/wiki/Cygnus_X_(star_complex)" title="Cygnus X (star complex)">Cygnus X</a> <small>(including <a href="/wiki/DR_21" title="DR 21">DR 21</a>)</small></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Nebula" title="Nebula">Nebulae</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Dark_nebula" title="Dark nebula">Dark</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/Barnard_146" class="mw-redirect" title="Barnard 146">Barnard 146</a></li> <li><a href="/wiki/Barnard_147" title="Barnard 147">Barnard 147</a></li> <li><a href="/wiki/IC_5146" title="IC 5146">IC 5146</a></li> <li><a href="/wiki/L1014" title="L1014">L1014</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/H_II_region" title="H II region">H II</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_6914" title="NGC 6914">NGC 6914</a></li> <li><a href="/wiki/North_America_Nebula" title="North America Nebula">North America Nebula</a></li> <li><a href="/wiki/Pelican_Nebula" title="Pelican Nebula">Pelican Nebula</a></li> <li><a href="/wiki/Sadr_Region" title="Sadr Region">Sadr Region</a></li> <li><a href="/wiki/Sh2-101" class="mw-redirect" title="Sh2-101">Sh2-101</a></li> <li><a href="/wiki/Sh2-106" class="mw-redirect" title="Sh2-106">Sh2-106</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Planetary_nebula" title="Planetary nebula">Planetary</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/Abell_78" title="Abell 78">Abell 78</a></li> <li><a href="/wiki/Egg_Nebula" title="Egg Nebula">Egg Nebula</a></li> <li><a href="/wiki/IRAS_19475%2B3119" title="IRAS 19475+3119">IRAS 19475+3119</a></li> <li><a href="/wiki/IRAS_20324%2B4057" title="IRAS 20324+4057">IRAS 20324+4057</a></li> <li><a href="/wiki/Kronberger_61" title="Kronberger 61">Kronberger 61</a></li> <li><a href="/wiki/M1-92" title="M1-92">M1-92</a></li> <li><a href="/wiki/NGC_6826" title="NGC 6826">NGC 6826</a></li> <li><a href="/wiki/NGC_6881" title="NGC 6881">NGC 6881</a></li> <li><a href="/wiki/NGC_6884" title="NGC 6884">NGC 6884</a></li> <li><a href="/wiki/NGC_7008" title="NGC 7008">NGC 7008</a></li> <li><a href="/wiki/NGC_7026" title="NGC 7026">NGC 7026</a></li> <li><a href="/wiki/NGC_7027" title="NGC 7027">NGC 7027</a></li> <li><a href="/wiki/NGC_7048" title="NGC 7048">NGC 7048</a></li> <li><a href="/wiki/Soap_Bubble_Nebula" title="Soap Bubble Nebula">Soap Bubble Nebula</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Wolf%E2%80%93Rayet_nebula" title="Wolf–Rayet nebula">WR</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/Crescent_Nebula" title="Crescent Nebula">Crescent Nebula</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/Supernova_remnant" title="Supernova remnant">SNR</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/Cygnus_Loop" title="Cygnus Loop">Cygnus Loop</a> <small>(including <a href="/wiki/Veil_Nebula" title="Veil Nebula">Veil Nebula</a>)</small></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Galaxy" title="Galaxy">Galaxies</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:6em"><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_6801" title="NGC 6801">6801</a></li> <li><a href="/wiki/NGC_6946" title="NGC 6946">6946</a></li> <li><a href="/wiki/NGC_7013" title="NGC 7013">7013</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em">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/3C_438" title="3C 438">3C 438</a></li> <li><a href="/wiki/4C_%2B48.48" title="4C +48.48">4C +48.48</a></li> <li><a href="/wiki/Cygnus_A" title="Cygnus A">Cygnus A</a></li> <li><a href="/wiki/ZTF_J203349.8%2B322901.1" class="mw-redirect" title="ZTF J203349.8+322901.1">ZTF J203349.8+322901.1</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Exoplanet" title="Exoplanet">Exoplanets</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th scope="row" class="navbox-group" style="width:6em"><a href="/wiki/List_of_exoplanets_discovered_by_the_Kepler_space_telescope" title="List of exoplanets discovered by the Kepler space telescope">Kepler</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/HAT-P-7b" title="HAT-P-7b">2b</a></li> <li><a href="/wiki/HAT-P-11b" title="HAT-P-11b">3b</a></li> <li><a href="/wiki/HAT-P-11c" class="mw-redirect" title="HAT-P-11c">3c</a></li> <li><a href="/wiki/Kepler-5b" title="Kepler-5b">5b</a></li> <li><a href="/wiki/Kepler-6b" title="Kepler-6b">6b</a></li> <li><a href="/wiki/Kepler-11b" title="Kepler-11b">11b</a></li> <li><a href="/wiki/Kepler-15b" title="Kepler-15b">15b</a></li> <li><a href="/wiki/Kepler-16b" title="Kepler-16b">16b</a></li> <li><a href="/wiki/Kepler-17b" title="Kepler-17b">17b</a></li> <li><a href="/wiki/Kepler-22b" title="Kepler-22b">22b</a></li> <li><a href="/wiki/Kepler-23b" title="Kepler-23b">23b</a></li> <li><a href="/wiki/Kepler-28b" title="Kepler-28b">28b</a></li> <li><a href="/wiki/Kepler-32b" title="Kepler-32b">32b</a></li> <li><a href="/wiki/Kepler-33b" title="Kepler-33b">33b</a></li> <li><a href="/wiki/Kepler-34b" title="Kepler-34b">34b</a></li> <li><a href="/wiki/Kepler-36b" title="Kepler-36b">36b</a></li> <li><a href="/wiki/Kepler-39b" title="Kepler-39b">39b</a></li> <li><a href="/wiki/Kepler-40b" title="Kepler-40b">40b</a></li> <li><a href="/wiki/Kepler-41b" title="Kepler-41b">41b</a></li> <li><a href="/wiki/Kepler-47b" title="Kepler-47b">47b</a></li> <li><a href="/wiki/Kepler-56b" title="Kepler-56b">56b</a></li> <li><a href="/wiki/Kepler-61b" title="Kepler-61b">61b</a></li> <li><a href="/wiki/PH1b" title="PH1b">64b (PH1b)</a></li> <li><a href="/wiki/Kepler-68b" title="Kepler-68b">68b</a></li> <li><a href="/wiki/Kepler-69b" class="mw-redirect" title="Kepler-69b">69b</a></li> <li><a href="/wiki/Kepler-70b" class="mw-redirect" title="Kepler-70b">70b</a></li> <li><a href="/wiki/Kepler-78b" title="Kepler-78b">78b</a></li> <li><a href="/wiki/Kepler-87c" title="Kepler-87c">87c</a></li> <li><a href="/wiki/Kepler-186b" title="Kepler-186b">186b</a></li> <li><a href="/wiki/Kepler-186e" title="Kepler-186e">e</a></li> <li><a href="/wiki/Kepler-186f" title="Kepler-186f">f</a></li> <li><a href="/wiki/Kepler-371b" title="Kepler-371b">371b</a></li> <li><a href="/wiki/Kepler-371c" title="Kepler-371c">c</a></li> <li><a href="/wiki/Kepler-409b" title="Kepler-409b">409b</a></li> <li><a href="/wiki/Kepler-419b" title="Kepler-419b">419b</a></li> <li><a href="/wiki/Kepler-432b" title="Kepler-432b">432b</a></li> <li><a href="/wiki/Kepler-451b" class="mw-redirect" title="Kepler-451b">451b</a></li> <li><a href="/wiki/Kepler-452b" title="Kepler-452b">452b</a></li> <li><a href="/wiki/Kepler-560b" title="Kepler-560b">560b</a></li> <li><a href="/wiki/Kepler-737b" title="Kepler-737b">737b</a></li> <li><a href="/wiki/Kepler-1229b" title="Kepler-1229b">1229b</a></li> <li><a href="/wiki/Kepler-1520b" title="Kepler-1520b">1520b</a></li> <li><a href="/wiki/Kepler-1625b" title="Kepler-1625b">1625b</a></li> <li><a href="/wiki/Kepler-1652b" title="Kepler-1652b">1652b</a></li> <li><a href="/wiki/Kepler-1658b" title="Kepler-1658b">1658b</a></li> <li><a href="/wiki/Kepler-1649b" title="Kepler-1649b">1649b</a></li> <li><a href="/wiki/Kepler-1649c" title="Kepler-1649c">c</a></li> <li><a href="/wiki/Kepler-1708b" title="Kepler-1708b">1708b</a></li></ul> </div></td></tr><tr><th scope="row" class="navbox-group" style="width:6em">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/HIP_99770_b" title="HIP 99770 b">b<sup>3</sup> Cygni b</a></li> <li><a href="/wiki/HD_185269_b" title="HD 185269 b">HD 185269 b</a></li> <li><a href="/wiki/HD_187123_b" title="HD 187123 b">HD 187123 b</a></li> <li><a href="/wiki/HD_187123_c" title="HD 187123 c">c</a></li> <li><a href="/wiki/HD_191806_b" title="HD 191806 b">HD 191806 b</a></li> <li><a href="/wiki/KELT-9b" title="KELT-9b">KELT-9b</a></li> <li><a href="/wiki/KELT-20b" title="KELT-20b">KELT-20b</a></li> <li><a href="/wiki/TrES-5b" title="TrES-5b">TrES-5b</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr><tr><th scope="row" class="navbox-group" style="text-align: center;;width:1%"><a href="/wiki/Exomoon" title="Exomoon">Exomoons</a></th><td class="navbox-list-with-group navbox-list navbox-odd" style="width:100%;padding:0"><div style="padding:0 0.25em"></div><table class="nowraplinks navbox-subgroup" style="border-spacing:0"><tbody><tr><th id="Kepler70" scope="row" class="navbox-group" style="width:6em"><a href="/wiki/List_of_exoplanets_discovered_by_the_Kepler_space_telescope" title="List of exoplanets discovered by the Kepler space telescope">Kepler</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/Kepler-1625b_I" title="Kepler-1625b I">1625b I</a></li> <li><a href="/wiki/Kepler-1708b_I" class="mw-redirect" title="Kepler-1708b I">1708b I</a></li></ul> </div></td></tr></tbody></table><div></div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=23_Cygni&oldid=1187291629">https://en.wikipedia.org/w/index.php?title=23_Cygni&oldid=1187291629</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:B-type_main-sequence_stars" title="Category:B-type main-sequence stars">B-type main-sequence stars</a></li><li><a href="/wiki/Category:Cygnus_(constellation)" 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