Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 15h 05m 25.83464s [1] |
Declination | +48° 09′ 03.4943″ [1] |
Apparent magnitude (V) | 5.581 [2] |
Characteristics | |
Evolutionary stage | main sequence [3] |
Spectral type | A0 Vs [4] |
B−V color index | −0.005±0.003 [5] |
Variable type | suspected [6] |
Astrometry | |
Radial velocity (Rv) | −12.63±0.73 [2] km/s |
Proper motion (μ) |
RA: −65.912
[1]
mas/
yr Dec.: +28.641 [1] mas/ yr |
Parallax (π) | 12.4980 ± 0.0766 mas [1] |
Distance | 261 ± 2
ly (80.0 ± 0.5 pc) |
Absolute magnitude (MV) | 0.97 [5] |
Details | |
47 Boo A | |
Mass | 2.46±0.02 [3] M☉ |
Radius | 1.8 [7] R☉ |
Luminosity | 45.7+2.2 −2.0 [2] L☉ |
Surface gravity (log g) | 4.32 [2] cgs |
Temperature | 10,130 [2] K |
Rotational velocity (v sin i) | 54.8±1.6 [2] km/s |
Other designations | |
Database references | |
SIMBAD | data |
47 Boötis is a binary star [9] system in the northern constellation of Boötes, [8] located 261 light years away from the Sun. [1] It has the Bayer designation k Boötis; 47 Boötis is the Flamsteed designation. [8] The system is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.58. [2] It is moving closer to the Earth with a heliocentric radial velocity of −13 km/s. [2]
The primary member of the system, designated component A, is an A-type main-sequence star with a stellar classification of A0 Vs. [4] The 's' indicates sharp lines as it has a moderate rotation rate with a projected rotational velocity of 55 km/s. [2] It is a suspected variable star of unknown type. [10] The star has 2.46 [3] times the mass of the Sun and is radiating 46 [2] times the Sun's luminosity from its photosphere at an effective temperature of 10,130 K. [2]
The companion, component B, is a magnitude 13.3 star located at an angular separation of 6.2 arcseconds away from the primary. [9]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 15h 05m 25.83464s [1] |
Declination | +48° 09′ 03.4943″ [1] |
Apparent magnitude (V) | 5.581 [2] |
Characteristics | |
Evolutionary stage | main sequence [3] |
Spectral type | A0 Vs [4] |
B−V color index | −0.005±0.003 [5] |
Variable type | suspected [6] |
Astrometry | |
Radial velocity (Rv) | −12.63±0.73 [2] km/s |
Proper motion (μ) |
RA: −65.912
[1]
mas/
yr Dec.: +28.641 [1] mas/ yr |
Parallax (π) | 12.4980 ± 0.0766 mas [1] |
Distance | 261 ± 2
ly (80.0 ± 0.5 pc) |
Absolute magnitude (MV) | 0.97 [5] |
Details | |
47 Boo A | |
Mass | 2.46±0.02 [3] M☉ |
Radius | 1.8 [7] R☉ |
Luminosity | 45.7+2.2 −2.0 [2] L☉ |
Surface gravity (log g) | 4.32 [2] cgs |
Temperature | 10,130 [2] K |
Rotational velocity (v sin i) | 54.8±1.6 [2] km/s |
Other designations | |
Database references | |
SIMBAD | data |
47 Boötis is a binary star [9] system in the northern constellation of Boötes, [8] located 261 light years away from the Sun. [1] It has the Bayer designation k Boötis; 47 Boötis is the Flamsteed designation. [8] The system is visible to the naked eye as a faint, white-hued star with a combined apparent visual magnitude of 5.58. [2] It is moving closer to the Earth with a heliocentric radial velocity of −13 km/s. [2]
The primary member of the system, designated component A, is an A-type main-sequence star with a stellar classification of A0 Vs. [4] The 's' indicates sharp lines as it has a moderate rotation rate with a projected rotational velocity of 55 km/s. [2] It is a suspected variable star of unknown type. [10] The star has 2.46 [3] times the mass of the Sun and is radiating 46 [2] times the Sun's luminosity from its photosphere at an effective temperature of 10,130 K. [2]
The companion, component B, is a magnitude 13.3 star located at an angular separation of 6.2 arcseconds away from the primary. [9]