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] |
Distance | 269 ± 3
ly (82.6 ± 0.9 pc) |
Absolute magnitude (MV) | 0.4 [3] |
Details | |
Mass | 1.72 [5] M☉ |
Radius | 12 [4] R☉ |
Luminosity | 64.6 [4] L☉ |
Surface gravity (log g) | 2.7 [4] cgs |
Temperature | 4,753 [4] K |
Metallicity [Fe/H] | −0.22 [4] dex |
Rotational velocity (v sin i) | 3.4 [4] km/s |
Age | 377 [1] Myr |
Other designations | |
Database references | |
SIMBAD | data |
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]