Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Virgo |
Right ascension | 12h 20m 20.98133s [1] |
Declination | +03° 18′ 45.2604″ [1] |
Apparent magnitude (V) | 4.96 [2] |
Characteristics | |
Spectral type | K0.5 IIIb Fe−0.5 [3] |
B−V color index | 1.16 [2] |
Astrometry | |
Radial velocity (Rv) | +36.66±0.17 [4] km/s |
Proper motion (μ) |
RA: −292.95
[1]
mas/
yr Dec.: −63.58 [1] mas/ yr |
Parallax (π) | 10.59 ± 0.25 mas [1] |
Distance | 308 ± 7
ly (94 ± 2 pc) |
Absolute magnitude (MV) | 0.26 [5] |
Details | |
Mass | 1.62 [2] M☉ |
Radius | 18 [6] R☉ |
Luminosity | 131.8 [2] L☉ |
Surface gravity (log g) | 2.20 [7] cgs |
Temperature | 4,423±32 [2] K |
Metallicity [Fe/H] | −0.33 [7] dex |
Age | 3.22 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
16 Virginis is a single [9] star in the zodiac constellation of Virgo, located about 308 [1] light years from the Sun. It has the Bayer designation c Virginis; 16 Virginis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.96. [2] This is an IAU radial velocity standard star; [10] it is moving further from the Earth with a heliocentric radial velocity of +37 km/s. [4] The star has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.301 ″ per year. [11]
In Chinese astronomy, 16 Virginis is called 謁者, Pinyin: Yèzhě, meaning Usher to the Court, because this star is marking itself and stand alone in Usher to the Court asterism, Supreme Palace enclosure mansion (see : Chinese constellation). [12]
This is an evolved K-type giant star with a stellar classification of K0.5 IIIb Fe−0.5, [3] where the suffix notation denotes a mild underabundance of iron in the spectrum. It is a red clump giant, which indicates is on the horizontal branch generating energy via helium fusion at its core. [13] The interferometry-measured angular diameter of this star, after correcting for limb darkening, is 1.74±0.02 mas, [14] which, at its estimated distance, equates to a physical radius of about 18 times the radius of the Sun. [6] It is about three [2] billion years old with 1.62 [2] times the mass of the Sun and is radiating 132 [2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,423 K. [2]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Virgo |
Right ascension | 12h 20m 20.98133s [1] |
Declination | +03° 18′ 45.2604″ [1] |
Apparent magnitude (V) | 4.96 [2] |
Characteristics | |
Spectral type | K0.5 IIIb Fe−0.5 [3] |
B−V color index | 1.16 [2] |
Astrometry | |
Radial velocity (Rv) | +36.66±0.17 [4] km/s |
Proper motion (μ) |
RA: −292.95
[1]
mas/
yr Dec.: −63.58 [1] mas/ yr |
Parallax (π) | 10.59 ± 0.25 mas [1] |
Distance | 308 ± 7
ly (94 ± 2 pc) |
Absolute magnitude (MV) | 0.26 [5] |
Details | |
Mass | 1.62 [2] M☉ |
Radius | 18 [6] R☉ |
Luminosity | 131.8 [2] L☉ |
Surface gravity (log g) | 2.20 [7] cgs |
Temperature | 4,423±32 [2] K |
Metallicity [Fe/H] | −0.33 [7] dex |
Age | 3.22 [2] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
16 Virginis is a single [9] star in the zodiac constellation of Virgo, located about 308 [1] light years from the Sun. It has the Bayer designation c Virginis; 16 Virginis is the Flamsteed designation. This object is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.96. [2] This is an IAU radial velocity standard star; [10] it is moving further from the Earth with a heliocentric radial velocity of +37 km/s. [4] The star has a relatively high proper motion, traversing the celestial sphere at an angular rate of 0.301 ″ per year. [11]
In Chinese astronomy, 16 Virginis is called 謁者, Pinyin: Yèzhě, meaning Usher to the Court, because this star is marking itself and stand alone in Usher to the Court asterism, Supreme Palace enclosure mansion (see : Chinese constellation). [12]
This is an evolved K-type giant star with a stellar classification of K0.5 IIIb Fe−0.5, [3] where the suffix notation denotes a mild underabundance of iron in the spectrum. It is a red clump giant, which indicates is on the horizontal branch generating energy via helium fusion at its core. [13] The interferometry-measured angular diameter of this star, after correcting for limb darkening, is 1.74±0.02 mas, [14] which, at its estimated distance, equates to a physical radius of about 18 times the radius of the Sun. [6] It is about three [2] billion years old with 1.62 [2] times the mass of the Sun and is radiating 132 [2] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,423 K. [2]