HD 157819
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara |
| Right ascension | 17h 28m 38.91416s |
| Declination | −55° 10′ 10.8720″ |
| Apparent magnitude (V) | 5.94 |
| Characteristics | |
| Spectral type | G8 II-III |
| B−V color index | +1.11 |
| Astrometry | |
| Radial velocity (Rv) | −12.6±0.4 km/s |
| Proper motion (μ) | RA: +2.52 mas/yr Dec.: −8.92 mas/yr |
| Parallax (π) | 3.31±0.41 mas |
| Distance | approx. 1,000 ly (approx. 300 pc) |
| Absolute magnitude (MV) | −2.9 |
| Details | |
| Mass | 2.5 M☉ |
| Radius | 31 R☉ |
| Luminosity | 444 L☉ |
| Surface gravity (log g) | 2.22 cgs |
| Temperature | 4,895 K |
| Metallicity [Fe/H] | −0.13 dex |
| Rotational velocity (v sin i) | 6.4 km/s |
| Other designations | |
| HD 157819, HIP 85520, HR 6487, SAO 244770 | |
| Database references | |
| SIMBAD | data |
HD 157819 is the Henry Draper Catalogue designation for a star in the southern constellation of Ara. It is faintly visible to the naked eye at an apparent visual magnitude of 5.94 and is approximately 1,000 light-years (310 parsecs) distant from the Earth. The spectrum of this star fits a stellar classification of G8 II-III, indicating it is a G-type star that is somewhere between a giant and bright giant.