Mu Virginis

Mu Virginis
Location of μ Virginis (circled)
Observation data
Epoch 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−B color index −0.04[2]
B−V color index +0.39[2]
Astrometry
Radial velocity (Rv)5.10±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]
Distance59.6 ± 0.2 ly
(18.27 ± 0.07 pc)
Absolute magnitude (MV)2.57[3]
Details
Radius1.99[6] R☉
Luminosity7.474[7] L☉
Surface gravity (log g)4.21[4] cgs
Temperature6,751[4] K
Metallicity [Fe/H]−0.05[4] dex
Rotational velocity (v sin i)47.0[8] km/s
Age1.5[3] Gyr
Other designations
Rijl al Awwa, μ Vir, 107 Vir, BD−05°3936, FK5 545, GJ 9491, HD 129502, HIP 71957, HR 5487, SAO 140090[9]
Database references
SIMBADdata

Mu Virginis, Latinized from μ Virginis, is a star in the zodiac constellation of 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)".[10] With an apparent visual magnitude of 3.88,[2] 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 parallax measurements, Mu Virginis is located some 59.6 light-years from the Sun.

Rijl al Awwa is an F-type main-sequence star with a stellar classification of F2 V,[4] although it does show some evidence of being a more evolved star.[6] It has an effective temperature of 6,751[4] K in its outer atmosphere.[4] The estimated age of the star is 1.5 billion years, and it has a relatively high 47.0[8] 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.[11]

Past observations of this star show some indications of short-term chromospheric variability as well as radial velocity variations.[6] It has a candidate common proper motion companion at a projected separation of 770 AU. This object has a J band magnitude of 10.72.[12]

  1. ^ a b c d e Cite error: The named reference van Leeuwen2007 was invoked but never defined (see the help page).
  2. ^ a b c d Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c Cite error: The named reference cgssn09 was invoked but never defined (see the help page).
  4. ^ a b c d e f g Cite error: The named reference Gray2006 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference Gontcharov2006 was invoked but never defined (see the help page).
  6. ^ a b c Cite error: The named reference Rachford2009 was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference moro-martin was invoked but never defined (see the help page).
  8. ^ a b Cite error: The named reference aaa493_3_1099 was invoked but never defined (see the help page).
  9. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  10. ^ Cite error: The named reference Allen1963 was invoked but never defined (see the help page).
  11. ^ Cite error: The named reference aass85_3_1015 was invoked but never defined (see the help page).
  12. ^ Cite error: The named reference Chini2014 was invoked but never defined (see the help page).