{{Short description|Triple star system in the constellation Boötes}} {{Starbox begin | name = HD 134064 }} {{Starbox observe | epoch = J2000 | constell = [[Boötes]]<ref name=xhip/> | ra = {{RA|15|07|20.369}}<ref name=dr3/> | dec = {{DEC|+18|26|30.57}}<ref name=dr3/> | appmag_v = 6.03<ref name=aa373_625/> }} {{Starbox character | class = A3Vnn<ref name=aa373_625/> | r-i = | v-r = | b-v = +0.06<ref name=osawa1959/> | u-b = +0.06<ref name=osawa1959/> | variable = }} {{Starbox astrometry | radial_v = −7.0<ref name=an328_9_889/> | prop_mo_ra = +42.368 | prop_mo_dec = −49.682 | pm_footnote = <ref name=dr3/> | parallax = 13.2096 | p_error = 0.0324 | parallax_footnote = <ref name=dr3/> | absmag_v = +1.74<ref name=xhip/> }} {{Starbox orbit | reference = <ref name=ORB6/> | period = 8.0 | axis = 0.10 | inclination = 122.6 | node = 41.3 | periastron = [[Besselian year|B]] 1939.97 | eccentricity = 0.45 | periarg = 71.4 }} {{Starbox detail | component1 = HD 134064 A | mass = 2.15<ref name=David_Hillenbrand_2015/> | radius = | luminosity = 16<ref name=Mcdonald2012/> | temperature = 9,732{{±|331}}<ref name=David_Hillenbrand_2015/> | metal_fe = | gravity = 4.25<ref name=David_Hillenbrand_2015/> | rotational_velocity = 185<ref name=David_Hillenbrand_2015/> | age_myr = 160<ref name=David_Hillenbrand_2015/> | component2 = HD 134064 B | mass2 = 0.73<ref name=mnras437_2_1216/> }} {{Starbox catalog | names = {{odlist | BD=+19°2924 | HD=134064 | HIP=74000 | HR=5633 | SAO=101379 | WDS=J15073+1827AB }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad=HD+134064 }} {{Starbox end}}

'''HD 134064''' is a [[triple star]] system in the northern [[constellation]] of [[Boötes]]. It is faintly visible to the naked eye with a combined [[apparent visual magnitude]] of 6.03.<ref name=aa373_625/> This system is located at a distance of 247&nbsp;[[light year]]s from the Sun based on [[stellar parallax|parallax]] measurements,<ref name=dr3/> but is drifting closer with a [[radial velocity]] of –7.0&nbsp;km/s.<ref name=an328_9_889/>

HD 134064 can be resolved into two stars {{val|110|ul="}} apart. The brighter primary is itself a close binary that has not been resolved into individual stars.

The two inner components of this system are orbiting each other with a [[orbital period|period]] of eight years and a high [[orbital eccentricity]] of 0.45.<ref name=ORB6/> The pair are separated by an orbital distance of around {{val|8000|ul=AU|fmt=commas}}.<ref name=mnras437_2_1216/> The primary component is a rapidly rotating [[A-type main sequence star]] with a [[stellar classification]] of A3Vnn.<ref name=aa373_625/> It has 2.15 times the [[mass of the Sun]] and is spinning with a [[projected rotational velocity]] of 185&nbsp;km/s.<ref name=David_Hillenbrand_2015/> The secondary star has 73% of the Sun's mass.<ref name=mnras437_2_1216/> The system is young, with an estimated age of 160&nbsp;million years.<ref name=David_Hillenbrand_2015/>

The fainter resolved component C is magnitude 11.39 and is less massive than the Sun.<ref name=dr3c/>

==References== <references> <ref name=SIMBAD>{{cite simbad | title=HD 134064 | access-date=2024-04-15 | postscript=. | mode = cs2 }}</ref>

<ref name=dr3>{{cite Gaia DR3|1211853854683080192}}</ref>

<ref name=dr3c>{{cite Gaia DR3|1211854129560990336}}</ref>

<ref name=David_Hillenbrand_2015>{{citation | postscript=. | last1=David | first1=Trevor J. | last2=Hillenbrand | first2=Lynne A. | title=The Ages of Early-Type Stars: Strömgren Photometric Methods Calibrated, Validated, Tested, and Applied to Hosts and Prospective Hosts of Directly Imaged Exoplanets | journal=The Astrophysical Journal | volume=804 | issue=2 | pages=146 | year=2015 | bibcode=2015ApJ...804..146D | doi=10.1088/0004-637X/804/2/146 | arxiv=1501.03154 | s2cid=33401607 }}</ref>

<ref name=an328_9_889>{{citation | postscript=. | title=Astrophysical supplements to the ASCC-2.5: Ia. Radial velocities of ˜55000 stars and mean radial velocities of 516 Galactic open clusters and associations | display-authors=1 | last1=Kharchenko | first1=N. V. | last2=Scholz | first2=R.-D. | last3=Piskunov | first3=A. E. | last4=Röser | first4=S. | last5=Schilbach | first5=E. | journal=Astronomische Nachrichten | volume=328 | issue=9 | pages=889–896 | year=2007 | bibcode=2007AN....328..889K | arxiv = 0705.0878 | doi=10.1002/asna.200710776 | s2cid=119323941 }}</ref>

<ref name=aa373_625>{{citation | postscript=. | title=A spectroscopic survey for λ Bootis stars. II. The observational data | display-authors=1 | last1=Paunzen | first1=E. | last2=Duffee | first2=B. | last3=Heiter | first3=U. | last4=Kuschnig | first4=R. | last5=Weiss | first5=W. W. | journal=Astronomy and Astrophysics | volume=373 | pages=625–632 | date=July 2001 | issue=2 | doi=10.1051/0004-6361:20010630 | doi-access=free | bibcode=2001A&A...373..625P }}</ref>

<ref name=osawa1959>{{citation | postscript=. | title=Spectral Classification of 533 B8-A2 Stars and the Mean Absolute Magnitude of a0 V Stars | last1=Osawa | first1=Kiyoteru | journal=Astrophysical Journal | volume=130 | page=159 | date=July 1959 | doi=10.1086/146706 | doi-access=free | bibcode=1959ApJ...130..159O }}</ref>

<ref name=mnras437_2_1216>{{citation | display-authors=1 | title=The VAST Survey - III. The multiplicity of A-type stars within 75 pc | last1=De Rosa | first1=R. J. | last2=Patience | first2=J. | last3=Wilson | first3=P. A. | last4=Schneider | first4=A. | last5=Wiktorowicz | first5=S. J. | last6=Vigan | first6=A. | last7=Marois | first7=C. | last8=Song | first8=I. | last9=Macintosh | first9=B. | last10=Graham | first10=J. R. | last11=Doyon | first11=R. | last12=Bessell | first12=M. S. | last13=Thomas | first13=S. | last14=Lai | first14=O. | journal=Monthly Notices of the Royal Astronomical Society | volume=437 | issue=2 | pages=1216–1240 | date=January 2014 | doi=10.1093/mnras/stt1932 | doi-access=free | bibcode=2014MNRAS.437.1216D | arxiv = 1311.7141 | s2cid=88503488 | postscript=. }}</ref>

<ref name=Mcdonald2012>{{citation | title=Fundamental Parameters and Infrared Excesses of Hipparcos Stars | display-authors=1 | last1=McDonald | first1=I. | last2=Zijlstra | first2=A. A. | last3=Boyer | first3=M. L. | journal=Monthly Notices of the Royal Astronomical Society | volume=427 | issue=1 | pages=343–57 | date=2012 | bibcode=2012MNRAS.427..343M | arxiv=1208.2037 | doi=10.1111/j.1365-2966.2012.21873.x | doi-access=free | s2cid=118665352 | postscript=. }}</ref>

<ref name=ORB6>{{citation | postscript=. | work=United States Naval Observatory | url=http://www.usno.navy.mil/USNO/astrometry/optical-IR-prod/wds/orb6|title=Sixth Catalog of Orbits of Visual Binary Stars | access-date=21 May 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=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> </references>

==External links== * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205633 HR 5633] * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J15073%2b1827AB CCDM J15073+1827] * [http://aladin.u-strasbg.fr/AladinPreview?-c=15+07+20.3691%2B18+26+30.570&ident=CCDM+J15073%2B1827AB&submit=Aladin+previewer Image HD 134064]

{{Stars of Boötes}} <!-- Properties --> [[Category:Triple stars]] [[Category:A-type main-sequence stars]] <!-- Location/catalogues --> [[Category:Boötes]] [[Category:Bright Star Catalogue objects|5633]] [[Category:Durchmusterung objects]] [[Category:Henry Draper Catalogue objects|134064]] [[Category:Hipparcos objects|074000]] [[Category:NGC objects]]