Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Virgo |
Right ascension | 13h 27m 27.16348s [1] |
Declination | −15° 58′ 24.8980″ [1] |
Apparent magnitude (V) | 4.76 [2] |
Characteristics | |
Evolutionary stage | horizontal branch |
Spectral type | K0 III-IIIb CN1.5 CH0.5 [3] |
U−B color index | +1.06 [4] |
B−V color index | +1.09 [4] |
Astrometry | |
Radial velocity (Rv) | −12.9±0.5 [5] km/s |
Proper motion (μ) |
RA: −121.016
[1]
mas/
yr Dec.: +21.197 [1] mas/ yr |
Parallax (π) | 12.5871 ± 0.2367 mas [1] |
Distance | 259 ± 5
ly (79 ± 1 pc) |
Absolute magnitude (MV) | 0.09 [2] |
Details [6] | |
Mass | 3.51±0.94 M☉ |
Radius | 15 [7] R☉ |
Luminosity | 87.1 [7] L☉ |
Surface gravity (log g) | 2.70±0.11 cgs |
Temperature | 4,909±92 K |
Metallicity [Fe/H] | 0.11 [8] dex |
Rotational velocity (v sin i) | 4.3 [7] km/s |
Age | 288+343 −156 Myr |
Other designations | |
Database references | |
SIMBAD | data |
69 Virginis is a single [10] star in the zodiac constellation of Virgo, located about 259 light years away. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of 4.76, [2] although it is a suspected variable that may range in magnitude from 4.75 down to 4.79. [11] This object is moving closer to the Earth with a heliocentric radial velocity of −13 km/s. [5] The light from this star is polarized due to intervening interstellar dust. [12]
This is an evolved K-type giant star with a stellar classification of K0 III-IIIb CN1.5 CH0.5, [3] showing overabundances of CN and CH molecules 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 star is about 288 million years old with 3.5 [6] times the mass of the Sun and 15 [7] times the Sun's radius. It is radiating 87 [7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,909 K. [6]
Observation data Epoch J2000.0 Equinox J2000.0 ( ICRS) | |
---|---|
Constellation | Virgo |
Right ascension | 13h 27m 27.16348s [1] |
Declination | −15° 58′ 24.8980″ [1] |
Apparent magnitude (V) | 4.76 [2] |
Characteristics | |
Evolutionary stage | horizontal branch |
Spectral type | K0 III-IIIb CN1.5 CH0.5 [3] |
U−B color index | +1.06 [4] |
B−V color index | +1.09 [4] |
Astrometry | |
Radial velocity (Rv) | −12.9±0.5 [5] km/s |
Proper motion (μ) |
RA: −121.016
[1]
mas/
yr Dec.: +21.197 [1] mas/ yr |
Parallax (π) | 12.5871 ± 0.2367 mas [1] |
Distance | 259 ± 5
ly (79 ± 1 pc) |
Absolute magnitude (MV) | 0.09 [2] |
Details [6] | |
Mass | 3.51±0.94 M☉ |
Radius | 15 [7] R☉ |
Luminosity | 87.1 [7] L☉ |
Surface gravity (log g) | 2.70±0.11 cgs |
Temperature | 4,909±92 K |
Metallicity [Fe/H] | 0.11 [8] dex |
Rotational velocity (v sin i) | 4.3 [7] km/s |
Age | 288+343 −156 Myr |
Other designations | |
Database references | |
SIMBAD | data |
69 Virginis is a single [10] star in the zodiac constellation of Virgo, located about 259 light years away. It is visible to the naked eye as a faint orange-hued star with an apparent visual magnitude of 4.76, [2] although it is a suspected variable that may range in magnitude from 4.75 down to 4.79. [11] This object is moving closer to the Earth with a heliocentric radial velocity of −13 km/s. [5] The light from this star is polarized due to intervening interstellar dust. [12]
This is an evolved K-type giant star with a stellar classification of K0 III-IIIb CN1.5 CH0.5, [3] showing overabundances of CN and CH molecules 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 star is about 288 million years old with 3.5 [6] times the mass of the Sun and 15 [7] times the Sun's radius. It is radiating 87 [7] times the Sun's luminosity from its enlarged photosphere at an effective temperature of 4,909 K. [6]