{{Short description|Binary star system in the constellation Boötes}} {{Starbox begin}} {{Starbox observe | epoch=J2000 | constell=[[Boötes]]<ref name=xhip/> | ra={{RA|14|32|20.22613}}<ref name="van Leeuwen2007"/> | dec={{DEC|+26|40|38.224}}<ref name="van Leeuwen2007"/> | appmag_v=5.88<ref name="MERMILLIOD"/> {{nowrap|(6.61 + 7.08)&zwj;<ref name=aa546_A69_5/>}} }} {{Starbox character | class=A7Vn + F0<ref name="Cvetkovic2010"/> | r-i = | v-r = | b-v = +0.21<ref name="MERMILLIOD"/> | u-b = +0.08<ref name="MERMILLIOD"/> | variable= }} {{Starbox astrometry | radial_v=−4<ref name=rgcrv/> | prop_mo_ra=−69.68<ref name="van Leeuwen2007"/> | prop_mo_dec=−21.90<ref name="van Leeuwen2007"/> | parallax=13.58 | p_error=0.69 | parallax_footnote=<ref name="van Leeuwen2007"/> | absmag_v={{nowrap|2.27 + 2.74}}<ref name="Cvetkovic2010"/> }} {{Starbox orbit | reference=<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|work=United States Naval Observatory|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> | period=29.93 | axis=0.200 | inclination=158.0 | node=23.3 | periastron=[[Besselian year|B]] 1983.85 | eccentricity=0.160 | periarg=57.0 }} {{Starbox detail | component1=A | mass=1.64<ref name=msc/> | radius= | luminosity= | temperature= | metal_fe= | gravity= | rotational_velocity=205<ref name=abt2004/> | age_myr= | component2=B | mass2=1.46<ref name=msc/> }} {{Starbox catalog | names={{odlist | BD=+27°2388 | HD=127726 | HIP=71094 | HR=5433 | SAO=83394 }} }} {{Starbox reference | Simbad=HD+127726 }} {{Starbox end}} '''HD 127726''' is a [[binary star]] system in the northern [[constellation]] of [[Boötes]]. The pair consist of a rapidly-rotating [[A-type main-sequence star]] and a fainter F-type companion, orbiting each other with a [[orbital period|period]] of 29.93&nbsp;years and an [[orbital eccentricity]] (ovalness) of 0.16. They have a combined [[apparent visual magnitude]] of 5.88, which is bright enough to be dimly visible to the naked eye. The system is located at a distance of approximately 240&nbsp;[[light year]]s from the [[Sun]].

A third star, 4.26" from HD 127726 and magnitude 6.0, shares a [[common proper motion]] although any orbit would be thousands of years long.<ref name=dr3c/><ref name=msc/>

==References== <references> <ref name=dr3c>{{cite Gaia DR3|1280208740235077760}}</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>

<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=abt2004>{{cite journal |bibcode=2004ApJ...616..562A |title=Tidal Effects in Binaries of Various Periods |last1=Abt |first1=Helmut A. |last2=Boonyarak |first2=Chayan |journal=The Astrophysical Journal |date=2004 |volume=616 |issue=1 |page=562 |doi=10.1086/423795 |doi-access=free }}</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=rgcrv>{{citation | last=Evans | first=D. S. | date=June 20–24, 1966 | editor1-last=Batten | editor1-first=Alan Henry | editor2-last=Heard | editor2-first=John Frederick | title=The Revision of the General Catalogue of Radial Velocities | work=Determination of Radial Velocities and their Applications, Proceedings from IAU Symposium no. 30 | volume=30 | page=57 | location=University of Toronto | publisher=[[International Astronomical Union]] | bibcode=1967IAUS...30...57E }}</ref>

<ref name="MERMILLIOD">{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data. SIMBAD | date=1986 | bibcode=1986EgUBV........0M | postscript=. }}</ref>

<ref name=aa546_A69_5>{{citation | display-authors=1 | last1=Malkov | first1=O. Yu. | last2=Tamazian | first2=V. S. | last3=Docobo | first3=J. A. | last4=Chulkov | first4=D. A. | title=Dynamical Masses of a Selected Sample of Orbital Binaries | journal=Astronomy & Astrophysics | volume=546 | id=A69 | pages=5 | date=2012 | doi=10.1051/0004-6361/201219774 | bibcode =2012A&A...546A..69M | doi-access=free }}</ref>

<ref name="Cvetkovic2010">{{citation | last1=Cvetkovic | first1=Z. | last2=Ninkovic | first2=S. | title=On the Component Masses of Visual Binaries | journal=Serbian Astronomical Journal | volume=180 | pages=71–80 | date=2010 | issue=180 | doi=10.2298/SAJ1080071C | bibcode =2010SerAJ.180...71C | doi-access=free }}</ref> </references>

==External links== * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205433 HR 5433] * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J14323%2b2641AB CCDM J14323+2641] * [http://aladin.u-strasbg.fr/AladinPreview?-c=14+32+20.2261%2B26+40+38.224&ident=NSV++6699&submit=Aladin+previewer Image HD 127726]

{{Stars of Boötes}}

[[Category:Boötes]] [[Category:Henry Draper Catalogue objects|127726]] [[Category:Binary stars]] [[Category:Hipparcos objects|071094]] [[Category:A-type main-sequence stars]] [[Category:Bright Star Catalogue objects|5433]] [[Category:Suspected variables]] [[Category:Durchmusterung objects]]