{{Short description|Star in the constellation Centaurus}} {{Starbox begin}} {{Starbox observe 2s | epoch = J2000.0 | constell = [[Centaurus]]<ref name=xhip/> | component1 = A | ra1 = {{RA|13|41|44.770}}<ref name=dr3a/> | dec1 = {{DEC|−54|33|33.93}}<ref name=dr3a/> | appmag_v1 = +5.22<ref name=tycho2/> | component2 = B | ra2 = {{RA|13|41|44.956}}<ref name=dr3b/> | dec2 = {{DEC|−54|33|39.21}}<ref name=dr3b/> | appmag_v2 = +6.52<ref name=tycho2/> }} {{Starbox character | class = B8Vn + A0V<ref name=gray1987/> | b-v = −0.05{{cn|date=August 2025}} | u-b = −0.23{{cn|date=August 2025}} }} {{Starbox astrometry | component1 = A | radial_v = {{val|+14.49|0.74}}<ref name=dr3a/> | prop_mo_ra = −43.783<ref name=dr3a/> | prop_mo_dec = −24.935<ref name=dr3a/> | parallax = 11.2810 | p_error = 0.0956 | parallax_footnote = <ref name=dr3a/> | absmag_v = | component2 = B | radial_v2 = | prop_mo_ra2 = −43.783<ref name=dr3b/> | prop_mo_dec2 = −24.935<ref name=dr3b/> | parallax2 = 11.3203 | p_error2 = 0.0329 | parallax_footnote2 = <ref name=dr3b/> | absmag_v2 = }} {{Starbox detail | component1 = A | mass = 2.8<ref name=tic/> | temperature = 10,740<ref name=tic/> | luminosity = 70<ref name=tic/> | radius = 2.4<ref name=tic/> | gravity = 4.12<ref name=tic/> | component2 = B | mass2 = 2.3<ref name=tic/> | temperature2 = 9,016<ref name=tic/> | luminosity2 = 16<ref name=tic/> | radius2 = 1.6<ref name=tic/> | gravity2 = 4.37<ref name=tic/> }} {{Starbox catalog | names = [[Harvard Revised catalogue|HR]] 5141, [[Henry Draper Catalogue|HD]] 118991, [[Durchmusterung|CP]]−53°5725, [[Hipparcos catalogue|HIP]] 66821, [[Smithsonian Astrophysical Observatory catalogue|SAO]] 241076, GC 18495, CCDM J13417-5434}} {{Starbox reference | Simbad = HD+118991 | Simbad2 = HD+118991A|sn2=A | Simbad3 = HD+118991B|sn3=B }} {{Starbox end}} '''Q Centauri''' (Q Cen) is a [[binary star]] in the [[constellation]] [[Centaurus]]. It has a combined [[apparent magnitude]] of +4.99<ref name=xhip/> and is approximately 288 [[light year]]s from [[Earth]].<ref name=dr3a/><ref name=dr3b/>
The primary component, Q Centauri A, is a blue-white [[stellar classification|B-type]] [[main sequence|main sequence dwarf]] with an [[apparent magnitude]] of +5.2. Its companion, Q Centauri B, is a white [[stellar classification|A-type]] main sequence dwarf with an apparent magnitude of +6.5. The two stars are separated by 5.6 [[arcsecond]]s on the sky.<ref name=wds/>
== References == {{Reflist|refs=
<ref name=dr3a>{{cite Gaia DR3|6065381024758288128}}</ref>
<ref name=dr3b>{{cite Gaia DR3|6065381029065308416}}</ref>
<ref name=xhip>{{cite XHIP|66821}}</ref>
<ref name=tycho2>{{cite journal |last1=Høg |first1=E. |last2=Fabricius |first2=C. |last3=Makarov |first3=V. V. |last4=Urban |first4=S. |last5=Corbin |first5=T. |last6=Wycoff |first6=G. |last7=Bastian |first7=U. |last8=Schwekendiek |first8=P. |last9=Wicenec |first9=A. |title=The Tycho-2 catalogue of the 2.5 million brightest stars |journal=Astronomy and Astrophysics |date=2000 |volume=355 |bibcode=2000A&A...355L..27H }}</ref>
<ref name=tic>{{cite journal |last1=Stassun |first1=Keivan G. |last2=Oelkers |first2=Ryan J. |last3=Paegert |first3=Martin |last4=Torres |first4=Guillermo |last5=Pepper |first5=Joshua |last6=De Lee |first6=Nathan |last7=Collins |first7=Kevin |last8=Latham |first8=David W. |last9=Muirhead |first9=Philip S. |last10=Chittidi |first10=Jay |last11=Rojas-Ayala |first11=Bárbara |last12=Fleming |first12=Scott W. |last13=Rose |first13=Mark E. |last14=Tenenbaum |first14=Peter |last15=Ting |first15=Eric B. |last16=Kane |first16=Stephen R. |last17=Barclay |first17=Thomas |last18=Bean |first18=Jacob L. |last19=Brassuer |first19=C. E. |last20=Charbonneau |first20=David |last21=Ge |first21=Jian |last22=Lissauer |first22=Jack J. |last23=Mann |first23=Andrew W. |last24=McLean |first24=Brian |last25=Mullally |first25=Susan |last26=Narita |first26=Norio |last27=Plavchan |first27=Peter |last28=Ricker |first28=George R. |last29=Sasselov |first29=Dimitar |last30=Seager |first30=S. |display-authors=1 |title=The Revised TESS Input Catalog and Candidate Target List |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |bibcode=2019AJ....158..138S }}</ref>
<ref name=wds>{{cite journal |last1=Mason |first1=Brian D. |last2=Wycoff |first2=Gary L. |last3=Hartkopf |first3=William I. |last4=Douglass |first4=Geoffrey G. |last5=Worley |first5=Charles E. |title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog |journal=The Astronomical Journal |date=2001 |volume=122 |issue=6 |page=3466 |doi=10.1086/323920 |bibcode=2001AJ....122.3466M }}</ref>
<ref name=gray1987>{{cite journal |last1=Gray |first1=R. O. |last2=Garrison |first2=R. F. |title=The Early A-Type Stars: Refined MK Classification, Confrontation with Stroemgren Photometry, and the Effects of Rotation |journal=The Astrophysical Journal Supplement Series |date=1987 |volume=65 |page=581 |doi=10.1086/191237 |bibcode=1987ApJS...65..581G }}</ref>
}}
{{Stars of Centaurus}}
[[Category:Bayer objects|Centauri, Q]] [[Category:Binary stars]] [[Category:B-type main-sequence stars]] [[Category:A-type main-sequence stars]] [[Category:Centaurus]] [[Category:Bright Star Catalogue objects|5141]] [[Category:Henry Draper Catalogue objects|118991]] [[Category:Hipparcos objects|066821]] [[Category:Durchmusterung objects]]
{{Multi-star-stub}}