HD 101930
HD 101930, also known as Gliese 3683, is an orange hued star with an orbiting exoplanet located in the southern constellation Centaurus. It has an apparent magnitude of 8.21, making it faintly visible in binoculars but not to the naked eye. The system is located relatively close at a distance of 98 light years but is receding with a heliocentric radial velocity of 18.4 km/s. It has a relatively large proper motion, traversing the celestial sphere with an angular velocity of 0.320″·yr−1.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Centaurus |
| Right ascension | 11h 43m 30.11338s |
| Declination | –58° 00′ 24.7787″ |
| Apparent magnitude (V) | 8.21 |
| Characteristics | |
| Spectral type | K2 V+ |
| B−V color index | +0.91 |
| Astrometry | |
| Radial velocity (Rv) | +18.36 km/s |
| Proper motion (μ) | RA: +16.680 mas/yr Dec.: +349.125 mas/yr |
| Parallax (π) | 33.3814 ± 0.0180 mas |
| Distance | 97.71 ± 0.05 ly (29.96 ± 0.02 pc) |
| Absolute magnitude (MV) | +5.88 |
| Details | |
| Mass | 0.82 M☉ |
| Radius | 0.87+0.05 −0.04 R☉ |
| Luminosity | 0.43±0.01 L☉ |
| Surface gravity (log g) | 4.40±0.11 cgs |
| Temperature | 5,079±62 K |
| Metallicity [Fe/H] | +0.1±0.03 dex |
| Rotational velocity (v sin i) | 2 km/s |
| Age | 5.4±4.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| ARICNS | data |
HD 101930 has a stellar classification of K2 V+, indicating that it is an ordinary K-type main-sequence star. It has a current mass of 0.82 M☉ and is said to be 5.4 billion years old, which is slightly older than the Sun. The object has 87% the radius of the Sun and an effective temperature of 5,079 K. When combined, these parameters yield a luminosity 43% that of the Sun from its photosphere. As expected with planetary hosts, HD 101930 is metal enriched, having a metallicity 26% above solar levels. The star's projected rotational velocity is similar to the Sun's, having a value of 2 km/s.
A 2007 multicity survey found a co-moving companion located 73″ away, making it a binary star. It has a class of M0-1 and a mass of 0.7 M☉.