Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Boötes |
Right ascension | 14h 53m 23.34844s[1] |
Declination | +15° 42′ 18.602″[1] |
Apparent magnitude (V) | 6.403[2] (6.89 / 7.55)[3] |
Characteristics | |
Spectral type | F4IV / G1IV[4] |
U−B color index | +0.122[2] |
B−V color index | +0.570[2] |
Astrometry | |
Radial velocity (Rv) | 20.8[5] km/s |
Proper motion (μ) | RA: −22.72[1] mas/yr Dec.: +21.58[1] mas/yr |
Parallax (π) | 20.99 ± 0.93 mas[1] |
Distance | 155 ± 7 ly (48 ± 2 pc) |
Absolute magnitude (MV) | 2.98[6] |
Orbit[7] | |
Period (P) | 313 yr |
Semi-major axis (a) | 1.358″ |
Eccentricity (e) | 0.50 |
Inclination (i) | 108.5° |
Longitude of the node (Ω) | 12.5° |
Periastron epoch (T) | 1824.0 |
Argument of periastron (ω) (secondary) | 49° |
Details | |
HD 131473 A | |
Mass | 1.34[8] M☉ |
Luminosity | 5.1[9] L☉ |
Temperature | 5,870[9] K |
Metallicity [Fe/H] | 0.19[6] dex |
Age | 2.5[6] Gyr |
HD 131473 B | |
Mass | 1.19[8] M☉ |
Other designations | |
Database references | |
SIMBAD | data |
HD 131473 is a binary star system in the northern constellation of Boötes. The primary is an F-type subgiant with a stellar classification of F4IV, while its companion is a G-type subgiant with a stellar classification of G1IV.[4]