X2 Centauri

{{Short description|Star in the constellation Centaurus}}

{{for|other stars with this Bayer designation|x Centauri}}

{{DISPLAYTITLE:x² Centauri}}

{{Starbox begin

|name=x² Centauri}}

{{Starbox observe

|constell=Centaurus

|epoch=J2000

| ra = {{RA|12|25|21.73454}}{{cite Gaia DR3|6157961866616797696}}

| dec = {{DEC|−35|11|11.0985}}

|appmag_v=5.71{{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|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}}

}}

{{Starbox character

|type=main sequence

|class=B9 IV/V{{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|last1=Houk|first1=N.|year=1982}}

|b-v=−0.06{{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}}

}}

{{Starbox astrometry

|radial_v=−11.3{{cite journal|title=The Revision of the General Catalogue of Radial Velocities|journal=Determination of Radial Velocities and Their Applications|volume=30|pages=57|author=Evans, D. S.|date=2006|bibcode=1967IAUS...30...57E}}

|prop_mo_ra=−41,277

|prop_mo_dec=−6.379

|parallax=7.1919

|p_error=0.0668

|parallax_footnote=

|absmag_v=0.26{{cite journal|title=The local system of early type stars - Spatial extent and kinematics|date=1985|journal=Astronomy and Astrophysics Supplement Series|volume=60|issue=99–134|pages=99|author=Westin, T. N. G.|bibcode=1985A&AS...60...99W}}

}}

{{Starbox detail

|mass=3.1{{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 }}

|temperature=111,794

|luminosity=141

|radius=2.8

|gravity=4.02

|rotation=7.26 days{{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 |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 }}

|rotational_velocity=

|age_myr=258

}}

{{Starbox catalog

|names=x² Cen, CD−34°8146, HD 108114, HIP 60610, SAO 203450, HR 4724, GC 16938{{cite simbad|title=* x2 Cen|access-date=15 January 2016}}

}}

{{Starbox reference

|Simbad=HD+108114}}

{{Starbox end}}

x² Centauri is a star located in the constellation Centaurus. 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 excellent viewing conditions. Its distance is about 454 light-years (139 parsecs), based on its parallax measured by the Hipparcos astrometry satellite.

x² Centauri's spectral type is B9IV/V, meaning it is a late B-type main sequence star or subgiant. These types of stars are a few times more massive than the Sun, and have effective temperatures of about 10,000 to 30,000 K. x² Centauri has a temperature of about {{val|fmt=commas|11,500|ul=K}}. The star x¹ Centauri, which lies about 0.4{{prime}} away from x² Centauri, may or may not form a physical binary star system with x² Centauri, as the two have similar proper motions and distances.{{cite simbad|title=* x1 Cen|access-date=16 January 2017}}