{{Short description|Star in the constellation Centaurus}} {{about|B Centauri|b Centauri|HD 129116|β Centauri|Beta Centauri|α Centauri b|Alpha Centauri b (disambiguation){{!}}α Centauri b}} {{Starbox begin | name = B Centauri }} {{Starbox image | image= {{Location mark |image=Centaurus constellation map.svg|alt=|float=center|width=280 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=B Centauri |x=900|y=570 }} |caption=Location of B Centauri (circled) }} {{Starbox observe | epoch = J2000.0 | constell = [[Centaurus]]<ref name=Anderson2012/> | ra = {{RA|11|51|08.69149}}<ref name=GaiaDR2/> | dec = {{DEC|−45|10|24.4890}}<ref name=GaiaDR2/> | appmag_v = +4.47<ref name=Anderson2012/> }} {{Starbox character | type = | class = K3III<ref name=houk1978/> | b-v = {{Val|+1.283|0.052}}<ref name=Anderson2012/> | u-b = | variable = }} {{Starbox astrometry | radial_v = {{Val|+2.2|2.7}}<ref name=Anderson2012/> | prop_mo_ra = -73.088<ref name=GaiaDR2/> | prop_mo_dec = -8.170<ref name=GaiaDR2/> | parallax = 7.4043 | p_error = 0.1863 | parallax_footnote = <ref name=GaiaDR2/> | absmag_v = −1.14<ref name=Anderson2012/> }} {{Starbox detail | source = | mass = 1.16<ref name=starhorse/> | radius = {{Val|39.0|1.2|5.4}}<ref name=GaiaDR2/> | luminosity = {{Val|480|14}}<ref name=GaiaDR2/> | temperature = {{Val|4325|251|65|fmt=commas}}<ref name=GaiaDR2/> | metal_fe = {{val|-0.03}}<ref name=starhorse/> | gravity = 1.32<ref name=starhorse/> | rotational_velocity = | age_myr = }} {{Starbox catalog | names = {{odlist | B=B&nbsp;Cen | CD=−44°7614 | FK5=446 | HD=102964 | HIP=57803 | HR=4546 | SAO=223062 | GC=16226 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = B+Cen }} {{Starbox end}}

'''HD 102964''', also known as '''B&nbsp;Centauri''', is a single<ref name=Eggleton2008/> [[star]] in the southern [[constellation]] of [[Centaurus]]. It has the identifier ''HD&nbsp;102964'' in the ''[[Henry Draper catalogue]]''; ''B&nbsp;Centauri'' is the star's [[Bayer designation]].<ref name=SIMBAD/> This object has an orange hue and is faintly visible to the naked eye with an [[apparent visual magnitude]] of +4.47.<ref name=Anderson2012/> The star is located at a distance of approximately 440&nbsp;[[light year]]s from the [[Sun]] based on [[stellar parallax|parallax]],<ref name=GaiaDR2/> and has an [[absolute magnitude]] of −1.14.<ref name=Anderson2012/>

This object is an aging [[giant star]] with a [[stellar classification]] of K3III,<ref name=houk1978/> indicating the star has exhausted the supply of hydrogen at its [[stellar core|core]] then cooled and expanded off the [[main sequence]]. At present it has 39 times the [[solar radius|girth of the Sun]]. It is radiating 480 times the [[luminosity of the Sun]] from its enlarged [[photosphere]] at an [[effective temperature]] of 4,325&nbsp;K.<ref name=GaiaDR2/>

== References == {{Reflist|colwidth=30em|refs=

<ref name=GaiaDR2>{{cite DR2|5378174716823588992}}</ref>

<ref name=SIMBAD>{{cite simbad | title=B Cen | access-date=2020-03-02}}</ref>

<ref name=Anderson2012>{{cite XHIP|57803|mode=cs2|postscript=.}}</ref>

<ref name=Eggleton2008>{{citation | last1=Eggleton | first1=P. P. | last2=Tokovinin | first2=A. A. | title=A catalogue of multiplicity among bright stellar systems | journal=Monthly Notices of the Royal Astronomical Society | volume=389 | issue=2 | pages=869–879 | date=September 2008 | bibcode=2008MNRAS.389..869E | arxiv=0806.2878 | doi=10.1111/j.1365-2966.2008.13596.x | doi-access=free | s2cid=14878976 | postscript=. }}</ref>

<ref name=houk1978>{{citation | last1=Houk | first1=Nancy | title=Michigan catalogue of two-dimensional spectral types for the HD stars | volume=2 | year=1978 | publication-place=Ann Arbor | publisher=Dept. of Astronomy, University of Michigan | bibcode=1978mcts.book.....H | postscript=. }}</ref>

<ref name=starhorse>{{cite journal |bibcode=2019A&A...628A..94A |title=Photo-astrometric distances, extinctions, and astrophysical parameters for Gaia DR2 stars brighter than G = 18 |last1=Anders |first1=F. |last2=Khalatyan |first2=A. |last3=Chiappini |first3=C. |last4=Queiroz |first4=A. B. |last5=Santiago |first5=B. X. |last6=Jordi |first6=C. |author6-link=Carme Jordi |last7=Girardi |first7=L. |last8=Brown |first8=A. G. A. |last9=Matijevič |first9=G. |last10=Monari |first10=G. |last11=Cantat-Gaudin |first11=T. |last12=Weiler |first12=M. |last13=Khan |first13=S. |last14=Miglio |first14=A. |last15=Carrillo |first15=I. |last16=Romero-Gómez |first16=M. |last17=Minchev |first17=I. |last18=De Jong |first18=R. S. |last19=Antoja |first19=T. |last20=Ramos |first20=P. |last21=Steinmetz |first21=M. |last22=Enke |first22=H. |journal=Astronomy and Astrophysics |volume=628 |pages=A94 |year=2019 |arxiv=1904.11302 |doi=10.1051/0004-6361/201935765 |s2cid = 131780028}}</ref>

}}

{{Stars of Centaurus}}

[[Category:K-type giants]] [[Category:Centaurus]] [[Category:Bayer objects|Centauri, B]] [[Category:Durchmusterung objects|BD-44 7614]] [[Category:Henry Draper Catalogue objects|102964]] [[Category:Hipparcos objects|057803]] [[Category:Bright Star Catalogue objects|4546]]