HD 101930
HD 101930 | |
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Observation data for epoch J2000.0 |
|
Constellation | centaur |
Right ascension | 11 h 43 m 30 s |
declination | −58 ° 0 ′ 24 ″ |
Apparent brightness | 8.21 |
Known exoplanets | 1 |
Characteristics | |
Spectral class | K1V |
BV color index | 0.908 |
Astrometry | |
Proper movement |
RA : 15.00 mas / year Dec. : 347.49 mas / year |
parallax | 32.79 mas |
distance | 99.45 light years |
Details | |
Dimensions | 0.74 M ☉ |
radius | 0.93 R ☉ |
Luminosity | 0.49 L ☉ |
Surface temperature : | 5079 K (approx. 4806 ° C ) |
Metallicity ( Fe / H ) | 0.17 |
Rotation time | 46 days |
Age | 5.39 billion years |
Other names | |
CD -57 ° 4096, HIP 57172, SAO 239322, GJ 3683 |
HD 101930 is a star system in the constellation Centaur almost 100 light-years away . HD 101930 consists of a main sequence star of the spectral class K1, which is orbited by a red dwarf ( HD 101930 B ) and an exoplanet ( HD 101930 b ). The main sequence star and the red dwarf form a wide binary star system with an angular distance of 73 "(approx. 2200 AU).
The surface temperature of the main component is about 5000 K lower than that of the sun and it is a little less bright and smaller than our central star . Because of this, the star is expected to be around 25 billion years old.
HD 101930 b
HD 101930 b is the name of the exoplanet orbiting the central star. It is the only exoplanet so far that could be detected in this star system. It accompanies the main component at a distance of about 0.3 astronomical units and takes about 70 days to orbit it. The exoplanet has at least 0.3 times the mass of Jupiter ; based on this, it is assumed that it is a gas planet . The exoplanet was discovered within the HARPS project using the radial velocity method. The discovery was published in 2005 by Christophe Lovis, Michel Mayor , Francesco Pepe, and others.
Web links
- Entry in the Encyclopedia of extrasolar planets (English)
- Entry in SIMBAD database (English)