47 Boötis
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 15h 05m 25.8345s |
| Declination | +48° 09′ 03.501″ |
| Apparent magnitude (V) | 5.581 |
| Characteristics | |
| Spectral type | A1V |
| U−B color index | 0.0–0.07 |
| B−V color index | 0.0 |
| Variable type | Variable star |
| Astrometry | |
| Radial velocity (Rv) | −13.0 km/s |
| Proper motion (μ) | RA: −65.26 mas/yr Dec.: 29.71 mas/yr |
| Parallax (π) | 12.55 ± 0.52 mas |
| Distance | 260 ± 10 ly (80 ± 3 pc) |
| Absolute magnitude (MV) | 5.577 |
| Details | |
| Mass | 3.1 M☉ |
| Radius | 2.1 R☉ |
| Luminosity | 40 L☉ |
| Temperature | 7,500–10,000 K |
| Rotation | 59 km/s 0.00494 year |
| Orbit | |
| Companion | CCDM 15054+4809 B |
| Semi-major axis (a) | 27″ |
| Inclination (i) | 202° |
| Other designations | |
| Database references | |
| SIMBAD | data |
47 Boötis or k Boötis is a binary star in the constellation Boötes. It is approximately 260 light years from Earth.
The primary component, 47 Boötis A, is a white A-type main sequence dwarf with an apparent magnitude of +5.59. The companion, 47 Boötis B, is a thirteenth magnitude star located 6.2 arcseconds away from the primary.
References
Components
| NAME | Right ascension | Declination | Apparent magnitude (V) | Spectral type | Database references |
|---|---|---|---|---|---|
| ADS 9500 B (BD+48 2262B) | 15h 05m 25.4s | +48° 08' 59 | 13.3 | Simbad |
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