HD 102117
| HD 102117 | |
|---|---|
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Observation data for epoch J2000.0 |
|
| Constellation | centaur |
| Right ascension | 11 h 44 m 50.46 s |
| declination | −58 ° 42 ′ 13.35 ″ |
| Apparent brightness | 7.47 |
| Known exoplanets | 1 |
| Characteristics | |
| Star type | Yellow dwarf |
| Spectral class | G6V |
| BV color index | 0.721 |
| Astrometry | |
| Radial velocity | 48.9 km / s |
| Proper movement |
RA : −63.05 mas / year Dec. : −69.87 mas / year |
| parallax | 23.81 mas |
| distance | 137 light years |
| Details | |
| Dimensions | 1.03 M ☉ |
| radius | 1.36 R ☉ |
| Luminosity | 1.57 L ☉ |
| Surface temperature : | 5672 K (approx. 5399 ° C ) |
| Metallicity ( Fe / H ) | 0.18 |
| Rotation time | 23 days |
| Age | approx. 6 billion years |
| Other names | |
| CD -58 ° 4207, HIP 57291, SAO 239348 | |
HD 102117 is a Sun-like star in the constellation Centaur, 137 light-years away. Although its surface temperature is lower than that of the Sun , the star is brighter than this. HD 102117 isorbitedby at least one planet ( exoplanet ).
HD 102117 b
HD 102117 b is the name of the planet orbiting the star HD 102117. So far it is the only planet that could be detected in this star system, the information on mass fluctuates between 0.14 and 0.3 Jupiter masses. One orbit around the central star takes 20.8 days. The planet was identified in 2004 using the radial velocity method by CG Tinney , R. Paul Butler and Geoffrey Marcy et al. discovered.
Web links
- Entry in the Encyclopedia of extrasolar planets (English)
- Entry in SIMBAD database (English)