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Upsilon Virginis

υ Virginis
Location of υ Virginis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Virgo
Right ascension 14h 19m 32.47974s[1]
Declination −02° 15′ 55.8587″[1]
Apparent magnitude (V) 5.27[2]
Characteristics
Evolutionary stage giant[1]
Spectral type G9 III[3]
U−B color index +0.81[2]
B−V color index 1.023[4]
Astrometry
Radial velocity (Rv)−26.68±0.16[4] km/s
Proper motion (μ) RA: −118.809[1] mas/yr
Dec.: −71.508[1] mas/yr
Parallax (π)12.1137 ± 0.1301 mas[1]
Distance269 ± 3 ly
(82.6 ± 0.9 pc)
Absolute magnitude (MV)0.4[3]
Details
Mass1.72[5] M☉
Radius12[4] R☉
Luminosity64.6[4] L☉
Surface gravity (log g)2.7[4] cgs
Temperature4,753[4] K
Metallicity [Fe/H]−0.22[4] dex
Rotational velocity (v sin i)3.4[4] km/s
Age377[1] Myr
Other designations
υ Vir, 102 Virginis, BD−01°2938, FK5 3134, HD 125454, HIP 70012, HR 5366, SAO 139866[6]
Database references
SIMBADdata

Upsilon Virginis (υ Vir, υ Virginis) is a single[7] star in the zodiac constellation of Virgo. It has an apparent visual magnitude of 5.25,[2] making it faintly visible to the naked eye. According to the Bortle scale, it is visible from backlit suburban skies at night. Based upon a measured annual parallax shift of 12.1 mas, it is located roughly 269 light-years (82.6 parsecs) from the Sun. If the star were at a distance of 33 light-years (10 parsecs), it would have a magnitude of +0.4 and be the third-brightest star in the night sky.[3]

This star has a stellar classification of G9 III,[3] which indicates it is an evolved G-type giant star. It has an estimated 172% of the Sun's mass and has expanded to 12 times the radius of the Sun, from which it is shining with 64.6 times the solar luminosity.[4] The effective temperature of the star's outer atmosphere is 4,753 K.[4] Based upon its motion through space, there is a 66% chance of being a member of the Hercules stream and a 27% chance it is a thin disk star.[8]

  1. ^ a b c d e f g Cite error: The named reference dr3 was invoked but never defined (see the help page).
  2. ^ a b c Cite error: The named reference Mermilliod1986 was invoked but never defined (see the help page).
  3. ^ a b c d Cite error: The named reference Takeda2008 was invoked but never defined (see the help page).
  4. ^ a b c d e f g h i j Cite error: The named reference Massarotti2008 was invoked but never defined (see the help page).
  5. ^ Cite error: The named reference aj133_6_2464 was invoked but never defined (see the help page).
  6. ^ Cite error: The named reference SIMBAD was invoked but never defined (see the help page).
  7. ^ Cite error: The named reference Eggleton2008 was invoked but never defined (see the help page).
  8. ^ Cite error: The named reference Soubiran2008 was invoked but never defined (see the help page).

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