Gliese 163
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 04h 09m 15.66834s |
| Declination | −53° 22′ 25.2900″ |
| Apparent magnitude (V) | 11.79 |
| Characteristics | |
| Spectral type | M3.5V |
| B−V color index | 1.480±0.008 |
| Astrometry | |
| Radial velocity (Rv) | 58.30±0.24 km/s |
| Proper motion (μ) | RA: 1046.236±0.019 mas/yr Dec.: 584.166±0.023 mas/yr |
| Parallax (π) | 66.0705±0.0172 mas |
| Distance | 49.36 ± 0.01 ly (15.135 ± 0.004 pc) |
| Absolute magnitude (MV) | 10.91 |
| Details | |
| Mass | 0.405±0.010 M☉ |
| Radius | 0.409+0.017 −0.016 R☉ |
| Luminosity | 0.02163±0.00063 L☉ |
| Surface gravity (log g) | 4.87 cgs |
| Temperature | 3,460+76 −74 K |
| Metallicity [Fe/H] | 0.1±0.1 dex |
| Rotation | 61.0±0.3 d |
| Rotational velocity (v sin i) | 0.85 km/s |
| Age | 5 Gyr |
| Other designations | |
| GJ 163, HIP 19394, LHS 188, LTT 1881 | |
| Database references | |
| SIMBAD | data |
Gliese 163 is a faint red dwarf star with multiple exoplanetary companions in the southern constellation of Dorado. Other stellar catalog names for it include HIP 19394 and LHS 188. It is too faint to be visible to the naked eye, having an apparent visual magnitude of 11.79 and an absolute magnitude of 10.91. This system is located at a distance of 49.4 light-years from the Sun based on parallax measurements. Judging by its space velocity components, it is most likely a thick disk star.
This is a small M-type main-sequence star with a stellar classification of M3.5V. It has a relatively low activity level for a red dwarf of its mass, suggesting it is an old star with an age of at least two billion years. This star has 41% of the mass and radius of the Sun. It is spinning slowly with a projected rotational velocity of 0.85 km/s and has a rotation period of 61 days. The star is radiating just 2% of the luminosity of the Sun from its photosphere at an effective temperature of 3,460 K.