HD 125351 or A Boötis (A Boo) is spectroscopic binary[6] in the constellation Boötes. The system has an apparent magnitude of +4.97, with a spectrum matching a K-type giant star. It is approximately 233 light-years from Earth.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes |
| Right ascension | 14h 17m 59.81955s[1] |
| Declination | +35° 30′ 34.2208″[1] |
| Apparent magnitude (V) | 4.9660±0.0007[2] |
| Characteristics | |
| Spectral type | K1III[3] |
| Astrometry | |
| Radial velocity (Rv) | −21.6±0.3[2] km/s |
| Proper motion (μ) | RA: 4.87[1] mas/yr Dec.: 14.40[1] mas/yr |
| Parallax (π) | 13.97 ± 0.39 mas[1] |
| Distance | 233 ± 7 ly (72 ± 2 pc) |
| Orbit[4] | |
| Primary | A Boötis B |
| Companion | A Boötis B |
| Period (P) | 212.085 days |
| Semi-major axis (a) | 2.3 mas |
| Eccentricity (e) | 0.570 |
| Inclination (i) | 83.5° |
| Longitude of the node (Ω) | 195.2° |
| Periastron epoch (T) | 2,440,286.002 |
| Argument of periastron (ω) (secondary) | 224.9° |
| Details | |
| Surface gravity (log g) | 2.25[5] cgs |
| Temperature | 4,650[5] K |
| Metallicity [Fe/H] | −0.03[5] dex |
| Other designations | |
| Database references | |
| SIMBAD | data |