{{short description|Binary star in the northern constellation of Boötes}} {{other stars by Bayer designation|Mu Boötis}} {{DISPLAYTITLE:Mu<sup>1</sup> Boötis}} {{Starbox begin | name=Mu<sup>1</sup> Boötis }} {{Starbox image | image ={{Location map|100x100 |AlternativeMap=Boötes IAU.svg |caption= |alt=Diagram showing star positions and boundaries of the Boötes constellation and its surroundings |width=250 |lat=64.5 |long=30.6 |mark=Cercle rouge 100%.svg | marksize=12 |float=center }}| caption=Location of μ<sup>1</sup> Boötis (circled) }} {{Starbox observe | epoch=J2000 | constell=[[Boötes]] | ra={{RA|15|24|29.43147}}<ref name=dr3a/> | dec={{DEC|+37|22|37.7613}}<ref name=dr3a/> | appmag_v=4.31<ref name=Malagnini1990/> }} {{Starbox character | class=F2IV<ref name=Kiyaeva2014/> | r-i = 0.15 | b-v = +0.31<ref name=Johnson1966/> | u-b = +0.06<ref name=Johnson1966/> }} {{Starbox astrometry | radial_v = {{Val|−8.60|0.3}}<ref name=Gontcharov2006/> | prop_mo_ra = −149.928<ref name=dr3a/> | prop_mo_dec = +89.573<ref name=dr3a/> | parallax = 26.5759 | p_error = 0.7871 | parallax_footnote = <ref name=dr3a/> | absmag_v=1.47<ref name=xhip/> }} {{Starbox orbit | reference = <ref name=Kiyaeva2014/> | primary = Aa | name=Ab | period_unitless=3.75 years | axis=0.099 | eccentricity=0.270 | inclination=129.7 | node=129.4 | periarg=43.5 | periastron=1006.33 }} {{Starbox detail | component1 = Aa | mass = 1.6<ref name=Kiyaeva2014/> | radius = 1.9<ref name=Malagnini1990/> | luminosity = 20<ref name=Zorec2012/> | temperature = 7,000<ref name=Kiyaeva2014/> | metal_fe = | gravity = 3.4<ref name=Kiyaeva2014/> | rotational_velocity = 89<ref name=Kiyaeva2014/> | age_gyr= }} {{Starbox detail|no_heading=y | component1 = Ab | mass = 1.5<ref name=Kiyaeva2014/> | radius = | luminosity = | temperature = 7,000<ref name=Kiyaeva2014/> | metal_fe = | gravity = 3.6<ref name=Kiyaeva2014/> | rotational_velocity = 40<ref name=Kiyaeva2014/> | age_gyr= }} {{Starbox catalog | names = {{odlist | name=Alkalurops | name2=Inkalunis | name3=Icalurus | name4=Clava | name5=Venabulum | BD=+37°2636 | GJ=3903 | HD=137391 | HIP=75411 | HR=5733 | SAO=64686 | GC=20724 | ADS=9626 | B=μ Boo | F=51 Boötis A | FK5=568 | CCDM=15245+3722 }} }} {{Starbox reference | Simbad=mu.01+Boo }} {{Starbox end}}
'''Mu<sup>1</sup> Boötis''' is a [[binary star]] in the northern [[constellation]] of [[Boötes]]. Its name is a [[Bayer designation]] that is [[Romanization of Greek|Latinized]] from '''μ<sup>1</sup> Boötis''', and abbreviated Mu<sup>1</sup> Boo or μ<sup>1</sup> Boo. This system had the traditional name '''Alkalurops''', pronounced {{IPAc-en|æ|l|k|ə|ˈ|lj|ʊər|ɒ|p|s}}.<ref name="IAU-CSN"/> Based on [[stellar parallax|parallax]] measurements, the system is located at a distance of 123 [[light-year]]s.
The components of the system have an [[angular separation]] of {{val|0.10|ul=arcsecond}}.<ref name=Mason_et_al_2001/> They form a [[spectroscopic binary]] system with an [[orbital period]] of 3.75 years.<ref name=Kiyaeva2014/> The visible component is a yellow-white [[stellar classification|F-type]] [[subgiant]] with an [[apparent magnitude]] of +4.31.
The system [[Mu2 Boötis|μ<sup>2</sup> Boötis]], separated by 109", makes an [[optical double]] with μ<sup>1</sup>, and even has a similar distance from Earth and comparable [[proper motion]]s, but has a substantially different metallicity, and therefore is not a gravitationally bound companion.<ref name=Kiyaeva2014/>
== Nomenclature== ''μ<sup>1</sup> Boötis'' ([[Latinisation of names|Latinised]] to ''Mu<sup>1</sup> Boötis'') is the star's [[Bayer designation]].
The system's traditional name ''Alkalurops'' is from the [[Greek language|Greek]] καλαύροψ ''kalaurops'' "a herdsman's crook or staff", with the [[Arabic]] prefix attached.<ref name=allen1963/> It has also been known as ''Inkalunis'' (from the [[Alfonsine tables]]), ''Clava'' ([[Latin]] 'the club') and ''Venabulum'' (Latin 'a hunting spear').<ref name=allen1963-2/> In 2016, the [[International Astronomical Union]] organized a [[IAU Working Group on Star Names|Working Group on Star Names]] (WGSN)<ref name="WGSN" /> to catalogue and standardize proper names for stars. The WGSN approved the name ''Alkalurops'' for ''μ<sup>1</sup> Boötis'' on 21 August 2016 and it is now so entered in the IAU Catalog of Star Names.<ref name="IAU-CSN" />
It is known as 七公六, Qī Gōng liù (the Sixth Star of the Seven Excellencies) in Chinese.<ref>{{in lang|zh}} [http://aeea.nmns.edu.tw/2006/0606/ap060626.html AEEA (Activities of Exhibition and Education in Astronomy) 天文教育資訊網 2006 年 6 月 26 日] {{Webarchive|url=https://web.archive.org/web/20110522121442/http://aeea.nmns.edu.tw/2006/0606/ap060626.html |date=2011-05-22 }}</ref>
==Gallery== <gallery> Alkalurops.jpg|Mu Bootis (Alkalurops) as seen in a small telescope Pos MuBoo.PNG|Illustration of Mu<sup>1,2</sup> Boötis </gallery>
==References== <references> <ref name=dr3a>{{cite Gaia DR3|1387349379494809600}}</ref>
<ref name=xhip>{{citation | title=XHIP: An extended hipparcos compilation | last1=Anderson | first1=E. | last2=Francis | first2=Ch. | journal=Astronomy Letters | arxiv=1108.4971 | volume=38 | issue=5 | pages=331 | year=2012 | bibcode=2012AstL...38..331A | doi=10.1134/S1063773712050015 | s2cid=119257644 | postscript=. }}</ref>
<ref name=Johnson1966>{{citation | display-authors=1 | last1=Johnson | first1=H. L. | last2=Iriarte | first2=B. | last3=Mitchell | first3=R. I. | last4=Wisniewskj | first4=W. Z. | title=UBVRIJKL photometry of the bright stars | journal=Communications of the Lunar and Planetary Laboratory | volume=4 | issue=99 | pages=99 | date=1966 | bibcode=1966CoLPL...4...99J | postscript=. }}</ref>
<ref name=Zorec2012>{{citation | last1=Zorec | first1=J. | last2=Royer | first2=F. | title=Rotational velocities of A-type stars. IV. Evolution of rotational velocities | journal=Astronomy & Astrophysics | volume=537 | page=A120 | date=January 2012 | doi=10.1051/0004-6361/201117691 | bibcode=2012A&A...537A.120Z | arxiv=1201.2052 | s2cid=55586789 | postscript=. }}</ref>
<ref name=Gontcharov2006>{{citation | last=Gontcharov | first=G. A. | title=Pulkovo Compilation of Radial Velocities for 35495 Hipparcos stars in a common system | journal=Astronomy Letters | volume=32| issue=11| pages=759–771| date=November 2006 | doi=10.1134/S1063773706110065 | bibcode=2006AstL...32..759G | arxiv=1606.08053 | s2cid=119231169 | postscript=. }}</ref>
<ref name="IAU-CSN">{{citation | postscript=. | title=IAU Catalog of Star Names | date=June 30, 2017 | last=Mamajek | first=Eric |display-authors=etal | publisher=IAU Division C Working Group on Star Names | url=http://www.pas.rochester.edu/~emamajek/WGSN/IAU-CSN.txt | access-date=28 July 2016 }}</ref>
<ref name="WGSN">{{citation | url=https://www.iau.org/science/scientific_bodies/working_groups/280/ | title=IAU Working Group on Star Names (WGSN) | publisher=International Astronomical Union | access-date=22 May 2016 | postscript=. }}</ref>
<ref name=Kiyaeva2014>{{citation | title=The multiple system ADS 9626: A quadruple star or an encounter of two binaries? | display-authors=1 | last1=Kiyaeva | first1=O. V. | last2=Zhuchkov | first2=R. Ya. | last3=Malogolovets | first3=E. V. | last4=Orlov | first4=V. V. | last5=Glukhova | first5=A. V. | last6=Balega | first6=Yu. Yu. | last7=Bikmaev | first7=I. F. | journal=Astronomy Reports | postscript=. | volume=58 | issue=11 | pages=835–848 | date=November 2014 | doi=10.1134/S106377291411002X | bibcode=2014ARep...58..835K | s2cid=122667185 }}</ref>
<ref name=Malagnini1990>{{citation | last1=Malagnini | first1=M. L. | last2=Morossi | first2=C. | title=Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars | journal=Astronomy and Astrophysics Supplement Series | volume=85 | issue=3 | pages=1015–1019 | date=November 1990 | bibcode=1990A&AS...85.1015M | postscript=. }}</ref>
<ref name=allen1963>{{citation | postscript=. | last=Allen | first=Richard H. | year=1963 | author-link=Richard Hinckley Allen | title=Star Names: Their Lore and Meaning | url=https://archive.org/details/starnamestheirlo00alle/page/97 | access-date=2016-09-15 | edition=Reprint | publisher=Dover Publications Inc | location=New York | isbn=((0-486-21079-0)) | page=97 | url-access=registration }}</ref>
<ref name=allen1963-2>{{citation | last=Allen | first=Richard H. | year=1963 | author-link=Richard Hinckley Allen | title=Star Names: Their Lore and Meaning | postscript=. | url=https://archive.org/details/starnamestheirlo00alle/page/105 | access-date=2016-09-15 | edition=Reprint | publisher=Dover Publications Inc | location=New York | isbn=((0-486-21079-0)) | page=105 | url-access=registration }}</ref>
<ref name=Mason_et_al_2001>{{citation | postscript=. | title=The 2001 US Naval Observatory Double Star CD-ROM. I. The Washington Double Star Catalog | journal=The Astronomical Journal | display-authors=1 | last1=Mason | first1=Brian D. | last2=Wycoff | first2=Gary L. | last3=Hartkopf | first3=William I. | last4=Douglass | first4=Geoffrey G. | last5=Worley | first5=Charles E. | volume=122 | issue=6 | pages=3466 | year=2001 | doi=10.1086/323920 | doi-access=free | bibcode=2001AJ....122.3466M }}</ref> </references>
==External links== * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205733 HR 5733] * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?HR%205734 HR 5734] * [http://webviz.u-strasbg.fr/viz-bin/VizieR-S?CCDM%20J15245%2b3722A CCDM J15245+3722] * [http://aladin.u-strasbg.fr/AladinPreview?-c=15+24+29.4278%2B37+22+37.800&ident=NSV++7063&submit=Aladin+previewer Image Mu Boötis]
{{Stars of Boötes|state=collapsed}}
[[Category:G-type main-sequence stars]] [[Category:F-type subgiants]] [[Category:Binary stars]] [[Category:Boötes]] [[Category:Bayer objects|Bootis, Mu1]] [[Category:Bright Star Catalogue objects|5733]] [[Category:Durchmusterung objects|BD+37 2636]] [[Category:Henry Draper Catalogue objects|137391]] [[Category:Hipparcos objects|075411]] [[Category:Stars with proper names|Alkalurops]]