HD 169830
HD 169830 is a star in the southern constellation of Sagittarius. It has a yellow-white hue and is dimly visible to the naked eye with an apparent visual magnitude of +5.90. The star is located at a distance of 120 light years from the Sun based on parallax. It is drifting closer with a radial velocity of −17.3 km/s, and is predicted to come as close as 20.7 ly (6.4 pc) in 2.08 million years. HD 169830 is known to be orbited by two large Jupiter-like exoplanets.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Sagittarius |
| Right ascension | 18h 27m 49.48500s |
| Declination | –29° 49′ 00.7008″ |
| Apparent magnitude (V) | +5.90 |
| Characteristics | |
| Spectral type | F7V |
| B−V color index | 0.517±0.004 |
| Variable type | “None” |
| Astrometry | |
| Radial velocity (Rv) | −17.271±0.0004 km/s |
| Proper motion (μ) | RA: −0.341 mas/yr Dec.: 16.103 mas/yr |
| Parallax (π) | 27.1461 ± 0.1469 mas |
| Distance | 120.1 ± 0.7 ly (36.8 ± 0.2 pc) |
| Absolute magnitude (MV) | +3.08 |
| Details | |
| Mass | 1.4 M☉ |
| Radius | 1.84 R☉ |
| Luminosity | 4.63 L☉ |
| Surface gravity (log g) | 4.06 cgs |
| Temperature | 6,300±50 K |
| Metallicity [Fe/H] | 0.15 dex |
| Rotation | 8.3 d |
| Rotational velocity (v sin i) | 3.83 km/s |
| Age | 4.95 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
This is an F-type main-sequence star with a stellar classification of F7V. It is 3.83 billion years old and chromospherically inactive with a slow rotation rate, having a projected rotational velocity of 3.83 km/s. This star is 40% more massive and 84% larger than the Sun. Combining the mass and radius makes the surface gravity only 41% that of the Sun. It is radiating 4.6 times the luminosity of the Sun from its photosphere at an effective temperature of 6,300 K.
A candidate stellar companion, designated component B, lies at an angular separation of 11″ along a position angle of 265°.