HD 155358
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Hercules |
| Right ascension | 17h 09m 34.61764s |
| Declination | +33° 21′ 21.0856″ |
| Apparent magnitude (V) | 7.27 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | G0 (F7VgG0mF5) |
| B−V color index | 0.545 |
| Astrometry | |
| Radial velocity (Rv) | −9.24±0.12 km/s |
| Proper motion (μ) | RA: −222.217 mas/yr Dec.: −215.865 mas/yr |
| Parallax (π) | 22.9212±0.0131 mas |
| Distance | 142.29 ± 0.08 ly (43.63 ± 0.02 pc) |
| Absolute magnitude (MV) | 4.06 |
| Details | |
| Mass | 0.85 M☉ |
| Radius | 1.4 R☉ |
| Luminosity | 1.9 L☉ |
| Surface gravity (log g) | 4.28 cgs |
| Temperature | 5,987 K |
| Metallicity [Fe/H] | −0.65 dex |
| Rotational velocity (v sin i) | 3.1 km/s |
| Age | 10.9 Gyr |
| Other designations | |
| BD+33 2840, SAO 65834, Wolf 646, HIP 83949 | |
| Database references | |
| SIMBAD | data |
HD 155358 is a low metallicity yellow dwarf star 44 pc away in the constellation Hercules. This star is known to be orbited by two extrasolar planets.
The star is 11.9 billion years old and has a mass 0.85 times that of the Sun. At the time of the planets' discoveries, it was notable for being the lowest metallicity planet-bearing star known, with an iron-to-hydrogen ratio 21% of the solar value.