HD 101930
Star in the constellation Centaurus / From Wikipedia, the free encyclopedia
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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,[2] 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[1] but is receding with a heliocentric radial velocity of 18.4 km/s.[5] It has a relatively large proper motion, traversing the celestial sphere with an angular velocity of 0.320″·yr−1.[13]
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Centaurus |
Right ascension | 11h 43m 30.11338s[1] |
Declination | –58° 00′ 24.7787″[1] |
Apparent magnitude (V) | 8.21[2] |
Characteristics | |
Spectral type | K2 V+[3] |
B−V color index | +0.91[4] |
Astrometry | |
Radial velocity (Rv) | +18.36[5] km/s |
Proper motion (μ) | RA: +16.680 mas/yr[1] Dec.: +349.125 mas/yr[1] |
Parallax (π) | 33.3814 ± 0.0180 mas[1] |
Distance | 97.71 ± 0.05 ly (29.96 ± 0.02 pc) |
Absolute magnitude (MV) | +5.88[2] |
Details | |
Mass | 0.82[6] M☉ |
Radius | 0.87+0.05 −0.04[7] R☉ |
Luminosity | 0.43±0.01[8] L☉ |
Surface gravity (log g) | 4.40±0.11[9] cgs |
Temperature | 5,079±62[5] K |
Metallicity [Fe/H] | +0.1±0.03[10] dex |
Rotational velocity (v sin i) | 2[11] km/s |
Age | 5.4±4.4[8] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
ARICNS | data |
HD 101930 has a stellar classification of K2 V+,[3] indicating that it is an ordinary K-type main-sequence star. It has a current mass of 0.82 M☉[6] and is said to be 5.4 billion years old,[8] which is slightly older than the Sun. The object has 87% the radius of the Sun[7] and an effective temperature of 5,079 K.[5] When combined, these parameters yield a luminosity 43% that of the Sun from its photosphere.[8] As expected with planetary hosts, HD 101930 is metal enriched, having a metallicity 26% above solar levels.[10] The star's projected rotational velocity is similar to the Sun's, having a value of 2 km/s.[11]
A 2007 multicity survey found a co-moving companion located 73″ away,[14] making it a binary star. It has a class of M0-1[15] and a mass of 0.7 M☉.[14]