{{Short description|Star in the constellation Centaurus}} {{DISPLAYTITLE:x<sup>2</sup> Centauri}} {{for|other stars with this [[Bayer designation]]|x Centauri}} {{Starbox begin | name = x<sup>2</sup> Centauri }} {{Starbox observe | constell = [[Centaurus (constellation)|Centaurus]]<ref name=xhip/> | epoch = [[J2000]] | ra = {{RA|12|25|21.73454}}<ref name=dr3>{{cite Gaia DR3|6157961866616797696}}</ref> | dec = {{DEC|−35|11|11.0985}}<ref name=dr3/> | appmag_v = 5.71<ref name=hog>{{cite journal|bibcode=2000A&A...355L..27H|title=The Tycho-2 catalogue of the 2.5 million brightest stars|journal=Astronomy and Astrophysics|volume=355|pages=L27 | display-authors=1 | 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. | year=2000 }}</ref> }} {{Starbox character | type = [[main sequence]]<ref name=dr3/> | class = B9 IV/V<ref name=houk>{{cite journal|bibcode=1982mcts.book.....H|title=Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0|journal=Michigan Catalogue of Two-dimensional Spectral Types for the HD Stars. Volume_3. Declinations -40_ƒ0 to -26_ƒ0|last=Houk|first=N.|year=1982}}</ref> | b-v = −0.06<ref name=UBV>{{cite journal|author=Lake, R.|title=Photometric Magnitudes and Colours for Bright Southern Stars (Sixth List) |journal=Monthly Notes of the Astron. Soc. Southern Africa|volume=24|page=41|date=1965|bibcode=1965MNSSA..24...41L}}</ref> | variable = }} {{Starbox astrometry | radial_v = −11.3<ref name=RV>{{cite journal|title=The Revision of the General Catalogue of Radial Velocities|journal=Determination of Radial Velocities and Their Applications|volume=30|pages=57| last=Evans | first=D. S. | date=2006 | bibcode=1967IAUS...30...57E}}</ref> | prop_mo_ra = −41,277<ref name=dr3/> | prop_mo_dec = −6.379 | pm_footnote = <ref name=dr3/> | parallax = 7.1919 | p_error = 0.0668 | parallax_footnote = <ref name=dr3/> | absmag_v = 0.07<ref name=xhip>{{cite XHIP|60610}}</ref> }} {{Starbox detail | mass = 3.1<ref name=tic>{{cite journal |bibcode=2019AJ....158..138S |title=The Revised TESS Input Catalog and Candidate Target List |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. |journal=The Astronomical Journal |date=2019 |volume=158 |issue=4 |page=138 |doi=10.3847/1538-3881/ab3467 |doi-access=free |arxiv=1905.10694 |display-authors=1 }}</ref> | temperature = 111,794<ref name=tic/> | luminosity = 141<ref name=tic/> | radius = 2.8<ref name=tic/> | gravity = 4.02<ref name=tic/> | rotation = 7.26 days<ref name=Oelkers_et_al_2018>{{cite journal |bibcode=2018AJ....155...39O |title=Variability Properties of Four Million Sources in the TESS Input Catalog Observed with the Kilodegree Extremely Little Telescope Survey | display-authors=1 |last1=Oelkers |first1=Ryan J. |last2=Rodriguez |first2=Joseph E. |last3=Stassun |first3=Keivan G. |last4=Pepper |first4=Joshua |last5=Somers |first5=Garrett |last6=Kafka |first6=Stella |last7=Stevens |first7=Daniel J. |last8=Beatty |first8=Thomas G. |last9=Siverd |first9=Robert J. |last10=Lund |first10=Michael B. |last11=Kuhn |first11=Rudolf B. |last12=James |first12=David |last13=Gaudi |first13=B. Scott |journal=The Astronomical Journal |date=2018 |volume=155 |issue=1 |page=39 |doi=10.3847/1538-3881/aa9bf4 |doi-access=free |arxiv=1711.03608 }}</ref> |rotational_velocity = |age_myr = 258<ref name=dr3/> }} {{Starbox catalog | names = {{odlist | B=x<sup>2</sup> Cen | CD=−34°8146 | HD=108114 | HIP=60610 | SAO=203450 | HR=4724 | GC=16938 }}<ref name="SIMBAD">{{cite simbad|title=* x2 Cen|access-date=15 January 2016}}</ref> }} {{Starbox reference |Simbad=HD+108114}} {{Starbox end}}

'''x<sup>2</sup> Centauri''' is a blue-white [[star]] located in the [[constellation]] [[Centaurus (constellation)|Centaurus]]. Its name is a [[Bayer designation]]; it is also known by its designations '''HD 108114''' and '''HR 4724'''. The [[apparent magnitude]] of the [[star]] is about 5.7, meaning it is only visible to the naked eye under [[Bortle scale|excellent viewing conditions]]. Its distance is about {{convert|454|ly|pc|abbr=out|lk=on}}, based on [[stellar parallax|parallax]] measurements.

x<sup>2</sup> Centauri's [[spectral type]] is B9IV/V, meaning it displays blended properties of a late [[B-type main sequence star]] and a [[subgiant]]. It is an estimated 258&nbsp;million years old,<ref name=dr3/> and is spinning with a [[rotation period]] of 7.26 days&nbsp;days.<ref name=Oelkers_et_al_2018/> This star has 3.1 times the mass of the Sun and 2.8 times the Sun's radius.<ref name=tic/> It is radiating 141<ref name=tic/> times the luminosity of the Sun from its [[photosphere]] at an [[effective temperature]] of 111,794&nbsp;K.<ref name=tic/>

The star [[X1 Centauri|x<sup>1</sup> Centauri]], which lies at an [[angular separation]] of 0.4{{prime}} from x<sup>2</sup> Centauri, may or may not form a physical [[binary star]] system with x<sup>2</sup> Centauri, as the two have similar [[proper motion]]s and distances.<ref>{{cite simbad|title=* x1 Cen|access-date=16 January 2017}}</ref>

== References == {{reflist}}

{{Stars of Centaurus}}

{{DEFAULTSORT:X2 Centauri}} <!-- Physical properties --> [[Category:B-type main-sequence stars]] [[Category:B-type subgiants]] <!-- Constellation & catalogues --> [[Category:Centaurus]] [[Category:Bayer objects|Centauri, x2]] [[Category:Bright Star Catalogue objects|4724]] [[Category:Durchmusterung objects|CD-34 08146]] [[Category:Hipparcos objects|060610]] [[Category:Henry Draper Catalogue objects|108114]]