Mu2 Boötis

{{short description|Binary star system in the northern constellation of Boötes}} {{other stars by Bayer designation|Mu Boötis}} {{DISPLAYTITLE:Mu² Boötis}} {{Starbox begin | name=Mu² 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 μ² Boötis (circled) }} {{Starbox observe 2s | epoch=J2000 | constell=[[Boötes (constellation)|Boötes]] | component1=A | ra1={{RA|15|24|30.86726}}<ref name=dr3a/> | dec1={{DEC|+37|20|50.2761}}<ref name=dr3a/> | appmag_v1=6.98<ref name=msc/> | component2=B | ra2={{RA|15|24|30.89704}}<ref name=dr3b/> | dec2={{DEC|+37|20|52.5550}}<ref name=dr3b/> | appmag_v2=7.63<ref name=msc/> }} {{Starbox character | type = [[main sequence]]<ref name=dr3a/><ref name=dr3b/> | class = F9V + G0V<ref name=Kiyaeva2014/> | b-v = +0.59<ref name=Johnson1966/> | u-b = +0.13<ref name=Johnson1966/> }} {{Starbox astrometry | component1 = A | radial_v = | prop_mo_ra = −139.142<ref name=dr3a/> | prop_mo_dec = +90.281<ref name=dr3a/> | parallax = 27.2223 | p_error = 0.0168 | parallax_footnote = <ref name=dr3a/> | absmag_v= }} {{Starbox astrometry|no_heading=y | component1 = B | radial_v = | prop_mo_ra = −152.149<ref name=dr3b/> | prop_mo_dec = +89.593<ref name=dr3b/> | parallax = 27.2126 | p_error = 0.0181 | parallax_footnote = <ref name=dr3b/> | absmag_v= }} {{Starbox orbit | reference = <ref name=Kiyaeva2014/> | primary = A | name=B | period=265 | axis=1.46 | eccentricity=0.585 | inclination=135.5 | node=174 | periarg=338 | periastron=1864.9 }} {{Starbox detail | component1 = A | mass = 1.24<ref name=Kiyaeva2014/> | radius = 1.23<ref name=dr3a/> | luminosity = 1.75<ref name=dr3a/> | temperature = 6,000<ref name=Kiyaeva2014/> | metal_fe = | gravity = 4.3<ref name=Kiyaeva2014/> | rotational_velocity = 5<ref name=Kiyaeva2014/> | age_gyr = 5.6<ref name=dr3a/> }} {{Starbox detail|no_heading=y | component1 = B | mass = 1.05<ref name=Kiyaeva2014/> | radius = 1.09<ref name=dr3b/> | luminosity = 1.06<ref name=dr3b/> | temperature = 5,900<ref name=Kiyaeva2014/> | metal_fe = | gravity = 4.4<ref name=Kiyaeva2014/> | rotational_velocity = 9<ref name=Kiyaeva2014/> | age_gyr = 11.3<ref name=dr3b/> }} {{Starbox catalog | names={{odlist | BD=+37°2637 | F=51 Boo B | GJ=3904 | HD=137392 | HIP=75415 | HR=5734 | SAO=64687 | GC=20725 }} }} {{Starbox reference | Simbad=51+Boo+B }} {{Starbox end}}

'''Mu² Boötis''' is a [[binary star]] in the northern [[constellation]] of [[Boötes]]. Its name is a [[Bayer designation]] that is [[Romanization of Greek|Latinized]] from '''μ² Boötis''', and abbreviated Mu² Boo or μ² Boo. Based on [[stellar parallax|parallax]] measurements, these stars are located at a distance of approximately 120 [[light-year]]s from the [[Sun]].

The components of μ² Boötis have apparent magnitudes of +7.0 and +7.6.<ref name=msc/> They have similar [[spectral type]]s, F9V and G0V respectively, and complete one orbit about their common centre of mass every 260 years.<ref name=Kiyaeva2014/>

The system [[Mu1 Boötis|μ¹ Boötis]] is at a similar distance and share similar proper motions with μ², but has a significantly different chemical composition, so they are not gravitationally bound.<ref name=Kiyaeva2014/>

==References== <references>

<ref name=dr3a>{{cite Gaia DR3|1387349065967311744}}</ref>

<ref name=dr3b>{{cite Gaia DR3|1387349065960639232}}</ref>

<ref name=msc>{{Cite journal |last=Tokovinin |first=Andrei |date=2018-03-01 |title=The Updated Multiple Star Catalog |bibcode=2018ApJS..235....6T |journal=The Astrophysical Journal Supplement Series |volume=235 |issue=1 |pages=6 |doi=10.3847/1538-4365/aaa1a5 |doi-access=free |arxiv=1712.04750 |issn=0067-0049}}</ref>

<ref name=Johnson1966>{{cite journal | 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 }}</ref>

<ref name=Kiyaeva2014>{{cite journal | 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 | volume=58 | issue=11 | pages=835–848 | date=November 2014 | doi=10.1134/S106377291411002X | bibcode=2014ARep...58..835K | s2cid=122667185 }}</ref>

</references>

{{Stars of Boötes|state=collapsed}}

[[Category:Boötes]] [[Category:G-type main-sequence stars]] [[Category:F-type main-sequence stars]] [[Category:Bayer objects|Bootis, Mu2]] [[Category:Bright Star Catalogue objects|5734]] [[Category:Durchmusterung objects|BD+37 2637]] [[Category:Henry Draper Catalogue objects|137392]] [[Category:Hipparcos objects|075415]]