47 Boötis
Template:Short description Template:About-distinguish
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | Template:RA[1] |
| Declination | Template:DEC[1] |
| Apparent magnitude (V) | 5.581[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | A0 Vs[4] |
| B−V Template:Engvar | Template:Val[5] |
| Variable type | suspected[6] |
| Astrometry | |
| Radial velocity (Rv) | Template:Val[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 | Template:Rnd ± Template:Rnd ly (Template:Rnd ± Template:Rnd pc) |
| Absolute magnitude (MV) | 0.97[5] |
| Details | |
| 47 Boo A | |
| Mass | Template:Val[3] Template:Solar mass |
| Radius | 1.8[7] Template:Solar radius |
| Luminosity | Template:Val[2] Template:Solar luminosity |
| Surface gravity (log g) | 4.32[2] cgs |
| Temperature | 10,130[2] K |
| Rotational velocity (v sin i) | Template:Val[2] km/s |
| Metallicity [Fe/H] | {{{metal_fe2}}} dex |
| Other designations | |
| Template:Odlist[8] | |
| Database references | |
| SIMBAD | data |
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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 Template:Val away from the primary.[9]
References
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