HD 191760
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Telescopium |
| Right ascension | 20h 13m 26.74628s |
| Declination | −46° 12′ 03.7089″ |
| Apparent magnitude (V) | 8.26 |
| Characteristics | |
| Evolutionary stage | Subgiant |
| Spectral type | G3IV/V |
| B−V color index | 0.668±0.014 |
| Variable type | Constant |
| Astrometry | |
| Radial velocity (Rv) | −30.06±0.20 km/s |
| Proper motion (μ) | RA: −0.723 mas/yr Dec.: −62.019 mas/yr |
| Parallax (π) | 11.2610±0.1091 mas |
| Distance | 290 ± 3 ly (88.8 ± 0.9 pc) |
| Absolute magnitude (MV) | 3.71 |
| Orbit | |
| Period (P) | 505.65±0.42 d |
| Semi-major axis (a) | 1.35 AU |
| Eccentricity (e) | 0.63±0.01 |
| Inclination (i) | 158.96±5.99° |
| Periastron epoch (T) | 2454835.65±2.06 |
| Argument of periastron (ω) (secondary) | 200.37±0.28° |
| Semi-amplitude (K1) (primary) | 1.04783±0.03871 km/s |
| Details | |
| Mass | 1.28+0.02 −0.10 M☉ |
| Radius | 1.62±0.07 R☉ |
| Luminosity | 2.69±0.20 L☉ |
| Surface gravity (log g) | 4.13+0.05 −0.04 cgs |
| Temperature | 5,794±76 K |
| Metallicity [Fe/H] | 0.29±0.07 dex |
| Rotation | 25.2 or 35.1 d |
| Rotational velocity (v sin i) | 2.33±0.05 km/s |
| Age | 4.1+0.8 −2.8 Gyr |
| HD 191760 b | |
| Mass | 106.34±29.03 MJup |
| Other designations | |
| CD−46°13445, HD 191760, HIP 99661, SAO 230105 | |
| Database references | |
| SIMBAD | data |
HD 191760 is a star in the southern constellation of Telescopium. It has a yellow hue but is too dim to be visible to the naked eye with an apparent visual magnitude of 8.26. The star is located at a distance of approximately 290 light-years from the Sun based on parallax, but is drifting closer with a radial velocity of −30 km/s.
The stellar classification of G3IV/V is consistent with a star that is evolving onto the subgiant branch, having exhausted the supply of hydrogen at its core. It is roughly four billion years old with a modest projected rotational velocity of 2.3 km/s. The star is 28% more massive than the Sun and 62% as large. The metallicity, or abundance of heavier elements, is higher than in the Sun. The star is radiating 2.7 times the luminosity of the Sun from its photosphere at an effective temperature of 5,794 K.