Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 14h 59m 36.94745s [1] |
Declination | +39° 15′ 55.1994″ [1] |
Apparent magnitude (V) | 5.64 [2] |
Characteristics | |
Evolutionary stage | giant [3] |
Spectral type | F1 III–IV [4] |
B−V color index | 0.336±0.004 [2] |
Astrometry | |
Radial velocity (Rv) | +12.3±0.7 [5] km/s |
Proper motion (μ) |
RA: −32.109
[1]
mas/
yr Dec.: 41.246 [1] mas/ yr |
Parallax (π) | 19.5911 ± 0.0702 mas [1] |
Distance | 166.5 ± 0.6
ly (51.0 ± 0.2 pc) |
Absolute magnitude (MV) | 2.08 [2] |
Details | |
Mass | 1.47 [6] M☉ |
Radius | 2.35+0.34 −0.13 [1] R☉ |
Luminosity | 11.585±0.054 [1] L☉ |
Surface gravity (log g) | 3.88 [6] cgs |
Temperature | 7,070±240 [6] K |
Metallicity [Fe/H] | −0.29 [5] dex |
Rotational velocity (v sin i) | 72.5 [3] km/s |
Age | 1.166 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
40 Boötis is a single [8] star located 166.5 light years away from the Sun in the northern constellation of Boötes. It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.64. [2] The star is moving away from the Earth with a heliocentric radial velocity of +12 km/s. [5]
The Hipparcos catalogue (1997) lists a stellar classification of F1 III–IV, [9] matching the luminosity class of an aging star that is evolving into a giant. [3] Earlier, Cowley and Bidelman (1979) listed a class of F2 III, [10] while Sato and Kuji (1990) found a main sequence class of F0V. [11] It is around 1.2 [6] billion years old with a relatively high rotation rate, showing a projected rotational velocity of 72.5 km/s. [3] The star has 1.5 [6] times the mass of the Sun and 2.4 [1] times the Sun's radius. It is radiating 11.6 [1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,070 K. [6]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 14h 59m 36.94745s [1] |
Declination | +39° 15′ 55.1994″ [1] |
Apparent magnitude (V) | 5.64 [2] |
Characteristics | |
Evolutionary stage | giant [3] |
Spectral type | F1 III–IV [4] |
B−V color index | 0.336±0.004 [2] |
Astrometry | |
Radial velocity (Rv) | +12.3±0.7 [5] km/s |
Proper motion (μ) |
RA: −32.109
[1]
mas/
yr Dec.: 41.246 [1] mas/ yr |
Parallax (π) | 19.5911 ± 0.0702 mas [1] |
Distance | 166.5 ± 0.6
ly (51.0 ± 0.2 pc) |
Absolute magnitude (MV) | 2.08 [2] |
Details | |
Mass | 1.47 [6] M☉ |
Radius | 2.35+0.34 −0.13 [1] R☉ |
Luminosity | 11.585±0.054 [1] L☉ |
Surface gravity (log g) | 3.88 [6] cgs |
Temperature | 7,070±240 [6] K |
Metallicity [Fe/H] | −0.29 [5] dex |
Rotational velocity (v sin i) | 72.5 [3] km/s |
Age | 1.166 [6] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
40 Boötis is a single [8] star located 166.5 light years away from the Sun in the northern constellation of Boötes. It is visible to the naked eye as a dim, yellow-white hued star with an apparent visual magnitude of 5.64. [2] The star is moving away from the Earth with a heliocentric radial velocity of +12 km/s. [5]
The Hipparcos catalogue (1997) lists a stellar classification of F1 III–IV, [9] matching the luminosity class of an aging star that is evolving into a giant. [3] Earlier, Cowley and Bidelman (1979) listed a class of F2 III, [10] while Sato and Kuji (1990) found a main sequence class of F0V. [11] It is around 1.2 [6] billion years old with a relatively high rotation rate, showing a projected rotational velocity of 72.5 km/s. [3] The star has 1.5 [6] times the mass of the Sun and 2.4 [1] times the Sun's radius. It is radiating 11.6 [1] times the luminosity of the Sun from its photosphere at an effective temperature of 7,070 K. [6]