| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ara[1] |
| Right ascension | 17h 28m 38.91416s[2] |
| Declination | −55° 10′ 10.8720″[2] |
| Apparent magnitude (V) | 5.94[3] |
| Characteristics | |
| Spectral type | G8 II-III[4] |
| B−Vcolor index | +1.11[3] |
| Astrometry | |
| Radial velocity (Rv) | −12.6±0.4[5] km/s |
| Proper motion (μ) | RA: +2.52[2]mas/yr Dec.: −8.92[2]mas/yr |
| Parallax (π) | 3.31±0.41 mas[2] |
| Distance | approx. 1,000 ly (approx. 300 pc) |
| Absolute magnitude (MV) | −2.9[6] |
| Details | |
| Mass | 2.5[7] M☉ |
| Radius | 31[8] R☉ |
| Luminosity | 444[9] L☉ |
| Surface gravity (log g) | 2.22[7] cgs |
| Temperature | 4,895[8] K |
| Metallicity[Fe/H] | −0.13[7] dex |
| Rotational velocity (v sin i) | 6.4[10] km/s |
| Other designations | |
| HD 157819,HIP 85520,HR 6487,SAO 244770[11] | |
| Database references | |
| SIMBAD | data |
HD 157819 is theHenry Draper Catalogue designation for astar in the southernconstellation ofAra. It is faintly visible to the naked eye at anapparent visual magnitude of 5.94[3] and is approximately 1,000light-years (310parsecs) distant from the Earth.[2] Thespectrum of this star fits astellar classification of G8 II-III,[4] indicating it is aG-type star that is somewhere between agiant andbright giant.
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 | This binary or multiple star system–related article is astub. You can help Wikipedia byadding missing information. |
