HD 131473

{{short description|Binary star system in the constellation of Boötes}} {{Starbox begin}} {{Starbox observe | epoch=J2000 | constell=[[Boötes]]<ref name=xhip/> | ra={{RA|14|53|23.34844}}<ref name="vanLeeuwen2007"/> | dec={{DEC|+15|42|18.602}}<ref name="vanLeeuwen2007"/> | appmag_v=6.403<ref name=aaass47_221/> {{nowrap|(6.89 / 7.55)&zwj;<ref name=ORB6/>}} }} {{Starbox character | class=F4IV / G1IV<ref name=Edwards/> | r-i = | v-r = | b-v = +0.570<ref name=aaass47_221/> | u-b = +0.122<ref name=aaass47_221/> | variable= }} {{Starbox astrometry | radial_v=20.8<ref name=gcsrv/> | prop_mo_ra=−22.72<ref name="vanLeeuwen2007"/> | prop_mo_dec=+21.58<ref name="vanLeeuwen2007"/> | parallax=20.99 | p_error=0.93 | parallax_footnote=<ref name="vanLeeuwen2007"/> | absmag_v=2.98<ref name=cgssn09/> }} {{Starbox orbit | reference=<ref name="Heintz1998"/> | name= | period=313 | axis=1.358 | eccentricity=0.50 | inclination=108.5 | node=12.5 | periarg=49 | periastron=1824.0 }} {{Starbox detail | component1=HD 131473 A | mass=1.34<ref name="aj147_4_87"/> | radius= | luminosity= | temperature= | metal_fe= | gravity= | rotational_velocity= | age_gyr= | component2=HD 131473 B | mass2=1.19<ref name="aj147_4_87"/> }} {{Starbox catalog | names=[[Bonner Durchmusterung|BD]]+16°2705, [[Henry Draper Catalogue|HD]] 131473, [[Hipparcos catalogue|HIP]] 72846, [[Harvard Revised catalogue|HR]] 5550, [[Smithsonian Astrophysical Observatory catalogue|SAO]] 101273<ref name=simbad/> }} {{Starbox reference | Simbad=HD+131473 | Simbad2=HD+131473A |sn2=A | Simbad3=HD+131473B |sn3=B }} {{Starbox end}} '''HD 131473''' is a [[binary star]] system in the northern [[constellation]] of [[Boötes]]. The primary is an [[F-type star|F-type]] [[subgiant]] with a [[stellar classification]] of F4IV, while its companion is a [[G-type star|G-type]] subgiant with a stellar classification of G1IV,<ref name=Edwards/> and both are somewhat more massive than the [[Sun]].<ref name="aj147_4_87"/> They perform a rather eccentric orbit once every 313 years.<ref name="Heintz1998"/>

An M7.5 star {{val|50|ul="}} from HD 131473 is a [[common proper motion]] companion. Any orbit around the inner pair would take tens of thousands of years.<ref name=msc/>

==References== <references> <ref name=simbad>{{cite simbad |title=HD 131473 |access-date=2025-04-18 }}</ref>

<ref name=msc>{{cite journal |bibcode=2018ApJS..235....6T |title=The Updated Multiple Star Catalog |last1=Tokovinin |first1=Andrei |journal=The Astrophysical Journal Supplement Series |date=2018 |volume=235 |issue=1 |page=6 |doi=10.3847/1538-4365/aaa1a5 |doi-access=free |arxiv=1712.04750 }}</ref>

<ref name=ORB6>{{cite web | url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6 | title=Sixth Catalog of Orbits of Visual Binary Stars | publisher=United States Naval Observatory | access-date=14 July 2017 | archive-date=1 August 2017 | archive-url=https://web.archive.org/web/20170801102553/http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6 | url-status=dead }}</ref>

<ref name=Edwards>{{cite journal | title=MK classification for visual binary components | last1= Edwards | first1= T. W. | journal= The Astronomical Journal | date=1976 | volume= 81 | page= 245 | bibcode=1976AJ.....81..245E | doi = 10.1086/111879 }}</ref>

<ref name="vanLeeuwen2007">{{citation | first=F. | last=van Leeuwen | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | date=November 2007 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | arxiv=0708.1752 | s2cid=18759600 | postscript=. }}</ref>

<ref name=gcsrv>{{citation | last=Wilson | first=R. E. | year=1953 | title=General Catalogue of Stellar Radial Velocities | journal=Carnegie Institute Washington D.C. Publication | publisher=Carnegie Institute of Washington D.C. | bibcode=1953GCRV..C......0W | postscript=. }}</ref>

<ref name=aaass47_221>{{citation | last1=Rakos | first1=K. D. | last2=Albrecht | first2=R. | last3=Jenkner | first3=H. | last4=Kreidl | first4=T. | last5=Michalke | first5=R. | last6=Oberlerchner | first6=D. | last7=Santos | first7=E. | last8=Schermann | first8=A. | last9=Schnell | first9=A. | last10=Weiss | first10=W. | display-authors=1 | title=Photometric and astrometric observations of close visual binaries | journal=Astronomy and Astrophysics Supplement Series | volume=47 |date=February 1982 | pages=221–235 | bibcode=1982A&AS...47..221R | postscript=. }}</ref>

<ref name="aj147_4_87">{{citation | title=From Binaries to Multiples. II. Hierarchical Multiplicity of F and G Dwarfs | last1=Tokovinin | first1=Andrei | journal=The Astronomical Journal | volume=147 | issue=4 | id=87 | pages=14 | date=April 2014 | doi=10.1088/0004-6256/147/4/87 | bibcode=2014AJ....147...87T | postscript=. | arxiv = 1401.6827 | s2cid=56066740 }}</ref>

<ref name=cgssn09>{{citation | last1=Holmberg | first1=J. | last2=Nordström | first2=B. | last3=Andersen | first3=J. | title=The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics | journal=Astronomy and Astrophysics | volume=501 | issue=3 |date=July 2009 | pages=941–947 | doi=10.1051/0004-6361/200811191 | bibcode=2009A&A...501..941H | arxiv=0811.3982 | s2cid=118577511 | postscript=. }}</ref>

<ref name="Heintz1998">{{citation | title=Observations of Double Stars. XVIII. | last1=Heintz | first1=W. D. | journal=The Astrophysical Journal Supplement Series | volume=117 | issue=2 | pages=587–598 | date=July 1998 | doi=10.1086/313127 | bibcode=1998ApJS..117..587H | postscript=. | doi-access=free}}</ref>

<ref name=xhip>{{cite journal |bibcode=2012AstL...38..331A |title=XHIP: An extended hipparcos compilation |last1=Anderson |first1=E. |last2=Francis |first2=Ch. |journal=Astronomy Letters |date=2012 |volume=38 |issue=5 |page=331 |doi=10.1134/S1063773712050015 |arxiv=1108.4971 }}</ref> </references>

==External links== * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205550 HR 5550] * [http://aladin.u-strasbg.fr/AladinPreview?-c=14+53+23.3480%2B15+42+18.602&ident=CCDM+J14534%2B1542AB&submit=Aladin+previewer Image HD 131473] * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J14534%2b1542AB CCDM J14534+154]

[[Category:Boötes]] [[Category:Henry Draper Catalogue objects|131473]] [[Category:Binary stars]] [[Category:Hipparcos objects|072846]] [[Category:F-type main-sequence stars]] [[Category:Bright Star Catalogue objects|5550]] [[Category:Durchmusterung objects]]