Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 14h 19m 45.23505s [1] |
Declination | +16° 18′ 24.9955″ [1] |
Apparent magnitude (V) | 4.84 [2] |
Characteristics | |
Spectral type | K3 III [3] |
B−V color index | 1.228±0.001 [2] |
Astrometry | |
Radial velocity (Rv) | −8.25±0.43 [2] km/s |
Proper motion (μ) |
RA: –141.521
[1]
mas/
yr Dec.: +60.274 [1] mas/ yr |
Parallax (π) | 17.8379 ± 0.1894 mas [1] |
Distance | 183 ± 2
ly (56.1 ± 0.6 pc) |
Absolute magnitude (MV) | 1.01±0.09 [4] |
Details [4] | |
Mass | 1.14±0.19 M☉ |
Radius | 12.18+0.26 −0.36 [1] R☉ |
Luminosity | 51.99±0.66 [1] L☉ |
Surface gravity (log g) | 2.36±0.08 cgs |
Temperature | 4,472 K |
Metallicity [Fe/H] | 0.16 dex |
Rotation | 848 days [5] |
Rotational velocity (v sin i) | 1.0 [5] km/s |
Age | 5.21±2.28 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
20 Boötis is a single [7] star in the northern constellation of Boötes, located 183 light years away from the Sun. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.84. [2] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.154 arc seconds per annum. [8] It is moving closer to the Earth with a heliocentric radial velocity of −8 km/s. [2]
This is an aging K-type giant star with a stellar classification of K3 III. [3] It is a red clump giant, [9] which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. The star is around five billion years old with 1.1 [4] times the mass of the Sun and has expanded to 12 [1] times the Sun's radius. It is radiating 52 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,472 K. [4]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 14h 19m 45.23505s [1] |
Declination | +16° 18′ 24.9955″ [1] |
Apparent magnitude (V) | 4.84 [2] |
Characteristics | |
Spectral type | K3 III [3] |
B−V color index | 1.228±0.001 [2] |
Astrometry | |
Radial velocity (Rv) | −8.25±0.43 [2] km/s |
Proper motion (μ) |
RA: –141.521
[1]
mas/
yr Dec.: +60.274 [1] mas/ yr |
Parallax (π) | 17.8379 ± 0.1894 mas [1] |
Distance | 183 ± 2
ly (56.1 ± 0.6 pc) |
Absolute magnitude (MV) | 1.01±0.09 [4] |
Details [4] | |
Mass | 1.14±0.19 M☉ |
Radius | 12.18+0.26 −0.36 [1] R☉ |
Luminosity | 51.99±0.66 [1] L☉ |
Surface gravity (log g) | 2.36±0.08 cgs |
Temperature | 4,472 K |
Metallicity [Fe/H] | 0.16 dex |
Rotation | 848 days [5] |
Rotational velocity (v sin i) | 1.0 [5] km/s |
Age | 5.21±2.28 Gyr |
Other designations | |
Database references | |
SIMBAD | data |
20 Boötis is a single [7] star in the northern constellation of Boötes, located 183 light years away from the Sun. It is visible to the naked eye as a faint, orange-hued star with an apparent visual magnitude of 4.84. [2] The star has a relatively high proper motion, traversing the celestial sphere at the rate of 0.154 arc seconds per annum. [8] It is moving closer to the Earth with a heliocentric radial velocity of −8 km/s. [2]
This is an aging K-type giant star with a stellar classification of K3 III. [3] It is a red clump giant, [9] which indicates it is on the horizontal branch and is generating energy through helium fusion at its core. The star is around five billion years old with 1.1 [4] times the mass of the Sun and has expanded to 12 [1] times the Sun's radius. It is radiating 52 [1] times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,472 K. [4]