| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h19m 30.51713s[1] |
| Declination | −50° 03′ 49.5490″[1] |
| Apparent magnitude (V) | 6.27[2] (7.0 + 7.0)[3] |
| Characteristics | |
| Spectral type | F8III + B9V[3] |
| B−V color index | +0.41[2] |
| Astrometry | |
| Radial velocity (Rv) | +10.50±1.2[4] km/s |
| Proper motion (μ) | RA: +8.76[1] mas/yr Dec.: −32.86[1] mas/yr |
| Parallax (π) | 16.94 ± 0.51 mas[1] |
| Distance | 193 ± 6 ly (59 ± 2 pc) |
| Details | |
| HD 156331 A | |
| Mass | 1.56[5] M☉ |
| Luminosity | 8.6[6] L☉ |
| Surface gravity (log g) | 3.46[5] cgs |
| Temperature | 6597[6] K |
| Metallicity [Fe/H] | −0.02[5] dex |
| Age | 1.80[5] Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
HD 156331isdouble star in the southern constellationofAra. As of 2014, the pair have an angular separation of less than an arc second along a position angle of 49°.[3]
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