Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 13h 46m 43.32359s [1] |
Declination | +25° 42′ 08.0548″ [1] |
Apparent magnitude (V) | 5.97 [2] |
Characteristics | |
Evolutionary stage | HG + MS [3] |
Spectral type | kA9hF6mF6 [4] (A7 V: + G5 III: [5] or F2p + G0 IV [3]) |
B−V color index | 0.523±0.004 [2] |
Astrometry | |
Radial velocity (Rv) | 11.9±0.9 [2] km/s |
Proper motion (μ) |
RA: −18.564
[1]
mas/
yr Dec.: −59.093 [1] mas/ yr |
Parallax (π) | 10.5064 ± 0.0425 mas [1] |
Distance | 310 ± 1
ly (95.2 ± 0.4 pc) |
Absolute magnitude (MV) | 1.21 [2] |
Orbit [3] | |
Period (P) | 36.006 d |
Eccentricity (e) | 0.543±0.002 |
Inclination (i) | 74.5±2.0° |
Semi-amplitude (K1) (primary) | 52.30±0.19 km/s |
Semi-amplitude (K2) (secondary) | 59.0±0.6 km/s |
Details | |
3 Boo A | |
Mass | 1.8 [3] M☉ |
Radius | 3.7 [3] R☉ |
Temperature | 5,848 [3] K |
3 Boo A | |
Mass | 1.6 [3] M☉ |
Radius | 2.6 [3] R☉ |
Temperature | 6,745 [3] K |
Age | 1.5 [3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
3 Boötis is a close binary star system in the northern constellation of Boötes, [6] located 310 light years away from the Sun based upon parallax. [1] It can be viewed with the naked eye in excellent seeing conditions as a dim star with an apparent visual magnitude of 5.97. [2] The system is moving further from the Earth with a heliocentric radial velocity of 12 km/s. [2]
This is a double-lined spectroscopic binary system with an orbital period of 36 days and an eccentricity of 0.543. The orbital plane is inclined 74.5° and the system does not form an eclipsing binary. The primary component is an evolving star currently in the Hertzsprung gap. Its companion is a main sequence star. Both members have more mass than the Sun and they are around 1.5 billion years old. [3]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 13h 46m 43.32359s [1] |
Declination | +25° 42′ 08.0548″ [1] |
Apparent magnitude (V) | 5.97 [2] |
Characteristics | |
Evolutionary stage | HG + MS [3] |
Spectral type | kA9hF6mF6 [4] (A7 V: + G5 III: [5] or F2p + G0 IV [3]) |
B−V color index | 0.523±0.004 [2] |
Astrometry | |
Radial velocity (Rv) | 11.9±0.9 [2] km/s |
Proper motion (μ) |
RA: −18.564
[1]
mas/
yr Dec.: −59.093 [1] mas/ yr |
Parallax (π) | 10.5064 ± 0.0425 mas [1] |
Distance | 310 ± 1
ly (95.2 ± 0.4 pc) |
Absolute magnitude (MV) | 1.21 [2] |
Orbit [3] | |
Period (P) | 36.006 d |
Eccentricity (e) | 0.543±0.002 |
Inclination (i) | 74.5±2.0° |
Semi-amplitude (K1) (primary) | 52.30±0.19 km/s |
Semi-amplitude (K2) (secondary) | 59.0±0.6 km/s |
Details | |
3 Boo A | |
Mass | 1.8 [3] M☉ |
Radius | 3.7 [3] R☉ |
Temperature | 5,848 [3] K |
3 Boo A | |
Mass | 1.6 [3] M☉ |
Radius | 2.6 [3] R☉ |
Temperature | 6,745 [3] K |
Age | 1.5 [3] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
3 Boötis is a close binary star system in the northern constellation of Boötes, [6] located 310 light years away from the Sun based upon parallax. [1] It can be viewed with the naked eye in excellent seeing conditions as a dim star with an apparent visual magnitude of 5.97. [2] The system is moving further from the Earth with a heliocentric radial velocity of 12 km/s. [2]
This is a double-lined spectroscopic binary system with an orbital period of 36 days and an eccentricity of 0.543. The orbital plane is inclined 74.5° and the system does not form an eclipsing binary. The primary component is an evolving star currently in the Hertzsprung gap. Its companion is a main sequence star. Both members have more mass than the Sun and they are around 1.5 billion years old. [3]