| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Boötes[1] |
| Right ascension | 15h 07m 20.369s[2] |
| Declination | +18° 26′ 30.57″[2] |
| Apparent magnitude (V) | 6.03[3] |
| Characteristics | |
| Spectral type | A3Vnn[3] |
| U−Bcolor index | +0.06[4] |
| B−Vcolor index | +0.06[4] |
| Astrometry | |
| Radial velocity (Rv) | −7.0[5] km/s |
| Proper motion (μ) | RA: +42.368mas/yr[2] Dec.: −49.682mas/yr[2] |
| Parallax (π) | 13.2096±0.0324 mas[2] |
| Distance | 246.9 ± 0.6 ly (75.7 ± 0.2 pc) |
| Absolute magnitude (MV) | +1.74[1] |
| Orbit[6] | |
| Period (P) | 8.0 yr |
| Semi-major axis (a) | 0.10″ |
| Eccentricity (e) | 0.45 |
| Inclination (i) | 122.6° |
| Longitude of the node (Ω) | 41.3° |
| Periastronepoch (T) | B 1939.97 |
| Argument of periastron (ω) (secondary) | 71.4° |
| Details | |
| HD 134064 A | |
| Mass | 2.15[7] M☉ |
| Luminosity | 16[8] L☉ |
| Surface gravity (log g) | 4.25[7] cgs |
| Temperature | 9,732±331[7] K |
| Rotational velocity (v sin i) | 185[7] km/s |
| Age | 160[7] Myr |
| HD 134064 B | |
| Mass | 0.73[9] M☉ |
| Other designations | |
| BD+19°2924,HD 134064,HIP 74000,HR 5633,SAO 101379,WDS J15073+1827AB[10] | |
| Database references | |
| SIMBAD | data |
HD 134064 is atriple star system in the northernconstellation ofBoötes. It is faintly visible to the naked eye with a combinedapparent visual magnitude of 6.03.[3] This system is located at a distance of 247 light years from the Sun based onparallax measurements,[2] but is drifting closer with aradial velocity of –7.0 km/s.[5]
HD 134064 can be resolved into two stars110″ apart. The brighter primary is itself a close binary that has not been resolved into individual stars.
The two inner components of this system are orbiting each other with aperiod of eight years and a highorbital eccentricity of 0.45.[6] The pair are separated by an orbital distance of around8,000 AU.[9] The primary component is a rapidly rotatingA-type main sequence star with astellar classification of A3Vnn.[3] It has 2.15 times themass of the Sun and is spinning with aprojected rotational velocity of 185 km/s.[7] The secondary star has 73% of the Sun's mass.[9] The system is young, with an estimated age of 160 million years.[7]
The fainter resolved component C is magnitude 11.39 and is less massive than the Sun.[11]
