{{Short description|Spectroscopic star system in the constellation Boötes}} {{redirect-distinguish|A Boötis|Arcturus {{!}} α Boötis}} {{Starbox begin}} {{Starbox image | image = {{Location mark |image=Boötes constellation map.svg|alt=|float=center|width=250 |label=|position=right |mark=Red circle.svg|mark_width=10|mark_link=HD 125351 |x=670|y=585 }} | caption = Location of HD 125351 (circled in red) }} {{Starbox observe | epoch = J2000 | constell = [[Boötes]]<ref name=xhip/> | ra = {{RA|14|17|59.81955}}<ref name="van Leeuwen2007"/> | dec = {{DEC|+35|30|34.2208}}<ref name="van Leeuwen2007"/> | appmag_v = {{val|4.9660|0.0007}}<ref name="aa430_165"/> }} {{Starbox character | type = [[red giant branch]]<ref name=dr3/> | class = K1III<ref name=Griffin1961/> | r-i = | v-r = | b-v = | u-b = | variable = }} {{Starbox astrometry | radial_v = {{val|−21.6|0.3}}<ref name="aa430_165"/> | prop_mo_ra = 4.87<ref name="van Leeuwen2007"/> | prop_mo_dec = 14.40<ref name="van Leeuwen2007"/> | parallax = 13.97 | p_error = 0.39 | parallax_footnote = <ref name="van Leeuwen2007"/> | absmag_v = +0.53<ref name=xhip/> }} {{Starbox orbit |reference=<ref>{{cite journal|title=Hipparcos Photocentric Orbits of 72 Single-lined Spectroscopic Binaries|author1=Ren, Shulin|journal=The Astronomical Journal|volume=145|issue=3|date=2013|page=81|bibcode=2013AJ....145...81R|doi=10.1088/0004-6256/145/3/81|s2cid=120199240 |doi-access=free}}</ref> |primary=A Boötis Aa1 |name=A Boötis Aa2 |period_unitless=212.085 days |axis_unitless=2.3 mas |inclination=83.5 |node=195.2 |periastron=2,440,286.002 |eccentricity=0.570 |periarg=224.9 }} {{Starbox detail | component1 = Aa1 | mass = 3.0<ref name=msc/> | radius = 13<ref name=dr3/> | luminosity = 75<ref name=dr3/> | temperature = 4,650<ref name=aj110_2968/> | metal_fe = −0.03<ref name=aj110_2968/> | gravity = 2.25<ref name=aj110_2968/> | rotation = | age = | component2 = Aa2 | mass2 = 1.2<ref name=msc/> }} {{Starbox detail|no_heading=y | component1 = Ab | mass = 1.85<ref name=msc/> }} {{Starbox catalog | names = [[Bayer designation|A]] Boötis, [[Bonner Durchmusterung|BD]]+36°2468, [[Henry Draper Catalogue|HD]] 125351, [[Hipparcos catalogue|HIP]]&nbsp;69879, [[Bright Star Catalogue|HR]] 5361, [[Smithsonian Astrophysical Observatory Star Catalog|SAO]] 64053 }} {{Starbox reference |Simbad=HD+125351 }} {{Starbox end}}

'''HD 125351''' or '''A Boötis''' ('''A Boo''') is multiple star system in the [[constellation]] [[Boötes]]. The system has an [[apparent magnitude]] of +4.97, with a spectrum matching a [[K-type star|K-type]] [[giant star]]. It is approximately 233 [[light-year]]s from [[Earth]].

HD 125351 is an [[astrometric]] and single-lined [[spectroscopic binary]] with a known 212-day orbit.<ref name=aaa398_1163/> [[Speckle interferometry]] has detected a companion at a separation of {{val|0.09|ul="}}, which is likely to be a different star from the unseen spectroscopic companion. It is 1.45 magnitudes fainter than the visible primary in the near [[infrared]]. An orbital period of seven years is suggested. This would make HD 125351 a triple system. Further faint stars at separations of {{val|14|u="}} and {{val|96|u="}} share a [[common proper motion]] although any orbits would take many thousands of years.<ref name=msc/>

==References== <references> <ref name=dr3>{{cite Gaia DR3|1480869955902288512}}</ref>

<ref name="van Leeuwen2007">{{citation | last1=van Leeuwen | first1=F. | title=Validation of the new Hipparcos reduction | journal=Astronomy and Astrophysics | volume=474 | issue=2 | pages=653–664 | year=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref>

<ref name=xhip>{{citation |postscript=. |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>

<ref name=msc>{{citation |postscript=. |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=aaa398_1163>{{citation | last1=Pourbaix | first1=D. | last2=Boffin | first2=H. M. J. | title=Reprocessing the Hipparcos Intermediate Astrometric Data of spectroscopic binaries. II. Systems with a giant component | journal=Astronomy and Astrophysics | volume=398 | pages=1163–1177 | date=February 2003 | issue=3 | doi=10.1051/0004-6361:20021736 | bibcode=2003A&A...398.1163P | arxiv = astro-ph/0211483 | s2cid=12361870 | postscript=. }}</ref>

<ref name="aa430_165">{{citation | display-authors=1 | last1=Famaey | first1=B. | last2=Jorissen | first2=A. | last3=Luri | first3=X. | last4=Mayor | first4=M. | last5=Udry | first5=S. | last6=Dejonghe | first6=H. | last7=Turon | first7=C. | title=Local kinematics of K and M giants from CORAVEL/Hipparcos/Tycho-2 data. Revisiting the concept of superclusters | journal=Astronomy and Astrophysics | volume=430 | pages=165–186 | date=2005 | doi=10.1051/0004-6361:20041272 | bibcode=2005A&A...430..165F | postscript=. |arxiv = astro-ph/0409579 | s2cid=17804304 }}</ref>

<ref name=aj110_2968>{{citation | last1=Luck | first1=R. Earle | last2=Challener | first2=Sharon L. | title=Chemical Abundances for Very Strong-Lined Giants | journal=Astronomical Journal | volume=110 | page=2968 | date=December 1995 | doi=10.1086/117741 | bibcode=1995AJ....110.2968L | postscript=. }}</ref>

<ref name=Griffin1961>{{citation | last1=Griffin | first1=R. F. | title=Photoelectric measurements of the lambda5250A Fe I triplet and the D lines in G and K stars | journal=Monthly Notices of the Royal Astronomical Society | volume=122 | page=181 | date=1961 | bibcode=1961MNRAS.122..181G | postscript=. | doi=10.1093/mnras/122.3.181 | doi-access=free}}</ref> </references>

==External links== * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205361 HR 5361] * [http://aladin.u-strasbg.fr/AladinPreview?-c=14+17+59.8196%2B35+30+34.219&ident=HD+125351&submit=Aladin+previewer Image HD 125351]

{{Stars of Boötes}}

[[Category:Bayer objects|Bootis, A]] [[Category:Henry Draper Catalogue objects|125351]] [[Category:Hipparcos objects|069879]] [[Category:Bright Star Catalogue objects|5361]] [[Category:Durchmusterung objects|BD+36 2468]] [[Category:K-type giants]] [[Category:Boötes]] [[Category:Spectroscopic binaries]]