{{Short description|F-type main sequence star in the constellation Virgo}} {{Starbox begin}} {{Starbox image | image = {{Location mark | image=Virgo IAU.svg | float=center | width=250 | position=right | mark=Red circle.svg | mark_width=10 | mark_link=μ Vir | x%=20.0 | y%=52.3 }} | caption=Location of μ Virginis (circled) }} {{Starbox observe | epoch = [[J2000.0]] | constell = [[Virgo (constellation)|Virgo]] | ra = {{RA|14|43|03.62282}}<ref name="van Leeuwen2007"/> | dec = {{DEC|−05|39|29.5327}}<ref name="van Leeuwen2007"/> | appmag_v = 3.88<ref name=Mermilliod1986/><ref name=cgssn09/> }} {{Starbox character | class = F2 V<ref name=Gray2006/> | b-v = +0.39<ref name=Mermilliod1986/> | u-b = −0.04<ref name=Mermilliod1986/> | variable = }} {{Starbox astrometry | radial_v = {{Val|5.10|0.7}}<ref name=Gontcharov2006/> | prop_mo_ra = +103.28<ref name="van Leeuwen2007"/> | prop_mo_dec = −318.63<ref name="van Leeuwen2007"/> | parallax = 54.73 | p_error = 0.20 | parallax_footnote = <ref name="van Leeuwen2007"/> | absmag_v = 2.57<ref name=cgssn09/> }} {{Starbox detail | mass = | radius = 1.99<ref name=Rachford2009/> | luminosity = 7.474<ref name=moro-martin/> | gravity = 4.21<ref name=Gray2006/> | temperature = 6,751<ref name=Gray2006/> | metal_fe = −0.05<ref name=Gray2006/> | rotational_velocity = 47.0<ref name=aaa493_3_1099/> | age_gyr = 1.5<ref name=cgssn09/> }} {{Starbox catalog | names = {{odlist | name=Rijl al Awwa | F=107 Vir | B=μ Vir | BD=−05°3936 | FK5=545 | GJ=9491 | HD=129502 | HIP=71957 | HR=5487 | SAO=140090 }}<ref name=SIMBAD/> }} {{Starbox reference | Simbad = mu+Vir }} {{Starbox end}}
'''Mu Virginis''', [[Romanization of Greek|Latinized]] from μ Virginis, is a [[star]] in the [[zodiac]] [[constellation]] of [[Virgo (constellation)|Virgo]]. It was listed in the ''Calendarium'' of [[Al Achsasi al Mouakket]] as ''rijl al-‘awwā’'', [[Arabic]] رجل العواء, meaning "The foot of the barking (dog)".<ref name=Allen1963/> With an [[apparent visual magnitude]] of 3.88,<ref name=Mermilliod1986/> it is bright enough to be seen with the naked eye. The position of the star near the [[celestial equator]] means it is visible from most of the [[Earth]]. Based upon [[stellar parallax|parallax]] measurements, Mu Virginis is located some 59.6 [[light-year]]s from the [[Sun]].
Mu Virginis is an [[F-type main-sequence star]] with a [[stellar classification]] of F2 V,<ref name=Gray2006/> although it does show some evidence of being a more [[stellar evolution|evolved star]].<ref name=Rachford2009/> It has an [[effective temperature]] of 6,751<ref name=Gray2006/> K in its [[stellar atmosphere|outer atmosphere]].<ref name=Gray2006/> The estimated age of the star is 1.5 billion years, and it has a relatively high 47.0<ref name=aaa493_3_1099/> km/s [[projected rotational velocity]]. A 1990 study of the star gave it a [[giant star]] classification, and modeled it with 1.7 times the mass of the Sun, 2.1 times the Sun's [[radius]], and shining with 9.8 times the [[Sun's luminosity]].<ref name=aass85_3_1015/>
Past observations of this star show some indications of short-term [[chromosphere|chromospheric]] variability as well as radial velocity variations.<ref name=Rachford2009/> It has a candidate [[common proper motion]] companion at a projected separation of 770 [[Astronomical Unit|AU]]. This object has a [[J band (infrared)|J band]] magnitude of 10.72.<ref name=Chini2014/>
==References== <references> <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 | date=2007 | arxiv=0708.1752 | bibcode=2007A&A...474..653V | doi=10.1051/0004-6361:20078357 | s2cid=18759600 | postscript=. }}</ref>
<ref name=Allen1963>{{citation | last=Allen | first=R. H. | author-link=Richard Hinckley Allen | title=[[Star Names: Their Lore and Meaning]] | edition=Reprint | publisher=Dover Publications Inc. | location=New York, NY | year=1963 | isbn=0-486-21079-0 | pages=[https://archive.org/details/starnamestheirlo00alle/page/473 473] }}</ref>
<ref name=aass85_3_1015>{{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=Gontcharov2006>{{citation | last1=Gontcharov | first1=G. A. | title=Pulkovo Compilation of Radial Velocities for 35,495 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 | postscript=. |arxiv = 1606.08053 | s2cid=119231169 }}</ref>
<ref name=Gray2006>{{citation | display-authors=1 | last1=Gray | first1=R. O. | last2=Corbally | first2=C. J. | last3=Garrison | first3=R. F. | last4=McFadden | first4=M. T. | last5=Bubar | first5=E. J. | last6=McGahee | first6=C. E. | last7=O'Donoghue | first7=A. A. | last8=Knox | first8=E. R. | title=Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample | journal=[[The Astronomical Journal]] | volume=132 | issue=1 | pages=161–170 | date=July 2006 | doi=10.1086/504637 | bibcode=2006AJ....132..161G | arxiv=astro-ph/0603770 | s2cid=119476992 | postscript=. }}</ref>
<ref name=aaa493_3_1099>{{citation | last1=Schröder | first1=C. | last2=Reiners | first2=Ansgar | last3=Schmitt | first3=Jürgen H. M. M. | title=Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo | journal=Astronomy and Astrophysics | volume=493 | issue=3 | pages=1099–1107 | date=January 2009 | doi=10.1051/0004-6361:200810377 | bibcode=2009A&A...493.1099S | doi-access=free | url=http://goedoc.uni-goettingen.de/goescholar/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2 | access-date=2018-11-04 | archive-date=2017-09-22 | archive-url=https://web.archive.org/web/20170922162905/https://goedoc.uni-goettingen.de/bitstream/handle/1/9690/aa10377-08.pdf?sequence=2 | url-status=dead }}</ref>
<ref name=cgssn09>{{citation | display-authors=1 | last1=Holmberg | first1=J. | last2=Nordström | first2=B. | last3=Andersen | first3=J. | title=The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics | journal=Astronomy and Astrophysics | volume=501 | issue=3 |date=July 2009 | pages=941–947 | doi=10.1051/0004-6361/200811191 | bibcode=2009A&A...501..941H | arxiv=0811.3982 | s2cid=118577511 | postscript=. }}</ref>
<ref name=Chini2014>{{citation | display-authors=1 | last1=Chini | first1=R. | last2=Fuhrmann | first2=K. | last3=Barr | first3=A. | last4=Pozo | first4=F. | last5=Westhues | first5=C. | last6=Hodapp | first6=K. | title=New visual companions of solar-type stars within 25 pc | journal=Monthly Notices of the Royal Astronomical Society | volume=437 | issue=1 | pages=879–886 | date=January 2014 | doi=10.1093/mnras/stt1953 | doi-access=free | bibcode=2014MNRAS.437..879C | arxiv=1310.2684 | s2cid=118717758 | postscript=. }}</ref>
<ref name=Rachford2009>{{citation | title=Chromospheric Variability in Early F-Type Stars | last1=Rachford | first1=Brian L. | last2=Foight | first2=Dillon R. | journal=The Astrophysical Journal | volume=698 | issue=1 | pages=786–802 | date=June 2009 | doi=10.1088/0004-637X/698/1/786 | bibcode=2009ApJ...698..786R | arxiv=0904.1620 | s2cid=693296 | postscript=. }}</ref>
<ref name=Mermilliod1986>{{citation | last1=Mermilliod | first1=J.-C. | title=Compilation of Eggen's UBV data, transformed to UBV (unpublished) | journal=Catalogue of Eggen's UBV Data | publisher=[[SIMBAD]] | date=1986 | bibcode=1986EgUBV........0M | postscript=. }}</ref>
<ref name=SIMBAD>{{cite simbad | title=* mu. Vir | access-date=2016-09-08 | postscript=. }}</ref>
<ref name=moro-martin>{{citation | title=Does the Presence of Planets Affect the Frequency and Properties of Extrasolar Kuiper Belts? Results from the Herschel Debris and Dunes Surveys | display-authors=1 | last1=Moro-Martín | first1=A. | last2=Marshall | first2=J. P. | last3=Kennedy | first3=G. | last4=Sibthorpe | first4=B. | last5=Matthews | first5=B. C. | last6=Eiroa | first6=C.| last7=Wyatt | first7=M. C. | last8=Lestrade | first8=J.-F. | last9=Maldonado | first9=J. | last10=Rodriguez | first10=D. | last11=Greaves | first11=J. S. | last12=Montesinos | first12=B. | last13=Mora | first13=A. | last14=Booth | first14=M. | last15=Duchêne| first15=G. | last16=Wilner | first16=D. | last17=Horner | first17=J. | journal=The Astrophysical Journal | postscript=. | volume=801 | issue=2 | pages=143 | year=2015 | doi=10.1088/0004-637X/801/2/143 | s2cid=55170390 | arxiv=1501.03813 | bibcode=2015ApJ...801..143M }}</ref> </references>
{{Virgo}}
{{DEFAULTSORT:Mu Virginis}} [[Category:F-type main-sequence stars]] [[Category:Virgo (constellation)]] [[Category:Bayer objects|Virginis, Mu]] [[Category:Durchmusterung objects]] [[Category:Flamsteed objects|Virginis, 107]] [[Category:Gliese and GJ objects|9491]] [[Category:Henry Draper Catalogue objects|129502]] [[Category:Hipparcos objects|071957]] [[Category:Bright Star Catalogue objects|5487]] [[Category:Stars with proper names|Rijl al Awwa]]