HD 156091
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 19m 12.50730s |
| Declination | −59° 41′ 40.5989″ |
| Apparent magnitude (V) | 5.91 (5.91 + 13.00) |
| Characteristics | |
| Spectral type | K2 IIICNIB/II |
| B−V color index | 1.37 |
| Astrometry | |
| Radial velocity (Rv) | −5.0±0.4 km/s |
| Proper motion (μ) | RA: −3.15 mas/yr Dec.: −8.05 mas/yr |
| Parallax (π) | 1.31±0.36 mas |
| Distance | approx. 2,500 ly (approx. 800 pc) |
| Absolute magnitude (MV) | −0.11 |
| Details | |
| Mass | 8.4±1.0 M☉ |
| Luminosity | 4,266 L☉ |
| Temperature | 4,306 K |
| Age | 33.7±8.6 Myr |
| Other designations | |
| CD−59°6506, HD 156091, HIP 84731, HR 6408, SAO 244613 | |
| Database references | |
| SIMBAD | data |
HD 156091 is a double star in the southern constellation of Ara. The primary is a sixth magnitude giant star with stronger than normal lines of carbon, nitrogen, and barium in its spectrum. The companion is a 13th magnitude star at an angular separation of 27.4″ along a position angle of 275°, as of 2000.