F-type main sequence star in the constellation Virgo
Mu Virginis Location of μ Virginis (circled)
Observation dataEpoch J2000.0 Equinox J2000.0 Constellation Virgo Right ascension 14h 43m 03.62282s [ 1] Declination −05° 39′ 29.5327″[ 1] Apparent magnitude (V)3.88[ 2] [ 3] Characteristics Spectral type F2 V[ 4] U−Bcolor index −0.04[ 2] B−Vcolor index +0.39[ 2] Astrometry Radial velocity (Rv )± 0.7[ 5] km/s Proper motion (μ)RA: +103.28[ 1] mas /yr Dec.: −318.63[ 1] mas /yr Parallax (π)54.73± 0.20 mas [ 1] Distance 59.6 ± 0.2 ly pc ) Absolute magnitude (MV )2.57[ 3] Details Radius 1.99[ 6] R ☉ Luminosity 7.474[ 7] L ☉ Surface gravity (log g )4.21[ 4] cgs Temperature 6,751[ 4] K Metallicity [Fe/H] −0.05[ 4] dex Rotational velocity (v sin i )47.0[ 8] Age 1.5[ 3] Gyr Other designations Rijl al Awwa,μ Vir ,107 Vir ,BD −05°3936FK5 545GJ 9491HD 129502HIP 71957HR 5487SAO 140090[ 9] Database references SIMBAD data
Mu Virginis ,Latinized from μ Virginis, is astar in thezodiac constellation ofVirgo . It was listed in theCalendarium ofAl Achsasi al Mouakket asrijl al-‘awwā’ , Arabic رجل العواء, meaning "The foot of the barking (dog)".[ 10] apparent visual magnitude of 3.88,[ 2] celestial equator means it is visible from most of theEarth . Based uponparallax measurements, Mu Virginis is located some 59.6 light-years from theSun .
Mu Virginis is anF-type main-sequence star with astellar classification of F2 V,[ 4] evolved star .[ 6] effective temperature of 6,751[ 4] outer atmosphere .[ 4] [ 8] projected rotational velocity . A 1990 study of the star gave it agiant 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 theSun's luminosity .[ 11]
Past observations of this star show some indications of short-termchromospheric variability as well as radial velocity variations.[ 6] common proper motion companion at a projected separation of 770 AU . This object has aJ band magnitude of 10.72.[ 12]
^a b c d e van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction",Astronomy and Astrophysics ,474 (2):653– 664,arXiv :0708.1752 Bibcode :2007A&A...474..653V ,doi :10.1051/0004-6361:20078357 ,S2CID 18759600 . ^a b c d Mermilliod, J.-C. (1986), "Compilation of Eggen's UBV data, transformed to UBV (unpublished)",Catalogue of Eggen's UBV Data ,SIMBAD ,Bibcode :1986EgUBV........0M . ^a b c Holmberg, J.; et al. (July 2009), "The Geneva-Copenhagen survey of the solar neighbourhood. III. Improved distances, ages, and kinematics",Astronomy and Astrophysics ,501 (3):941– 947,arXiv :0811.3982 Bibcode :2009A&A...501..941H ,doi :10.1051/0004-6361/200811191 ,S2CID 118577511 . ^a b c d e f g Gray, R. O.; et al. (July 2006), "Contributions to the Nearby Stars (NStars) Project: spectroscopy of stars earlier than M0 within 40 pc-The Southern Sample",The Astronomical Journal 132 (1):161– 170,arXiv :astro-ph/0603770 Bibcode :2006AJ....132..161G ,doi :10.1086/504637 ,S2CID 119476992 . ^ Gontcharov, G. A. (November 2006), "Pulkovo Compilation of Radial Velocities for 35,495 Hipparcos stars in a common system",Astronomy Letters ,32 (11):759– 771,arXiv :1606.08053 Bibcode :2006AstL...32..759G ,doi :10.1134/S1063773706110065 ,S2CID 119231169 . ^a b c Rachford, Brian L.; Foight, Dillon R. (June 2009), "Chromospheric Variability in Early F-Type Stars",The Astrophysical Journal ,698 (1):786– 802,arXiv :0904.1620 Bibcode :2009ApJ...698..786R ,doi :10.1088/0004-637X/698/1/786 ,S2CID 693296 . ^ Moro-Martín, A.; et al. (2015), "Does the Presence of Planets Affect the Frequency and Properties of Extrasolar Kuiper Belts? Results from the Herschel Debris and Dunes Surveys",The Astrophysical Journal ,801 (2): 143,arXiv :1501.03813 Bibcode :2015ApJ...801..143M ,doi :10.1088/0004-637X/801/2/143 ,S2CID 55170390 . ^a b Schröder, C.; Reiners, Ansgar; Schmitt, Jürgen H. M. M. (January 2009),"Ca II HK emission in rapidly rotating stars. Evidence for an onset of the solar-type dynamo" (PDF) ,Astronomy and Astrophysics ,493 (3):1099– 1107,Bibcode :2009A&A...493.1099S ,doi :10.1051/0004-6361:200810377 [permanent dead link ^ "* mu. Vir" .SIMBAD Centre de données astronomiques de Strasbourg . Retrieved2016-09-08 .{{cite web }}: CS1 maint: postscript (link )^ Allen, R. H. (1963),Star Names: Their Lore and Meaning 473 ,ISBN 0-486-21079-0 {{citation }}:ISBN / Date incompatibility (help ) ^ Malagnini, M. L.; Morossi, C. (November 1990), "Accurate absolute luminosities, effective temperatures, radii, masses and surface gravities for a selected sample of field stars",Astronomy and Astrophysics Supplement Series ,85 (3):1015– 1019,Bibcode :1990A&AS...85.1015M . ^ Chini, R.; et al. (January 2014), "New visual companions of solar-type stars within 25 pc",Monthly Notices of the Royal Astronomical Society ,437 (1):879– 886,arXiv :1310.2684 Bibcode :2014MNRAS.437..879C ,doi :10.1093/mnras/stt1953 S2CID 118717758 .
