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Spectroscopic star system in the constellation Boötes From Wikipedia, the free encyclopedia
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 |