HD 136118
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Stern HD 136118 |
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| AladinLite | |||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Snake | ||||||||||
| Right ascension | 15 h 18 m 55.5 s | ||||||||||
| declination | -01 ° 35 ′ 33 ″ | ||||||||||
| Apparent brightness | 6.9 likes | ||||||||||
| Typing | |||||||||||
| Spectral class | F9 V | ||||||||||
| Astrometry | |||||||||||
| Radial velocity | (−3.6 ± 0.1) km / s | ||||||||||
| parallax | (21.47 ± 0.54) mas | ||||||||||
| distance | (152 ± 4) ly (46.6 ± 1.2) pc |
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| Proper movement | |||||||||||
| Rec. Share: | approx. −123 mas / a | ||||||||||
| Dec. portion: | approx. +24 mas / a | ||||||||||
| Physical Properties | |||||||||||
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Other names and catalog entries |
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HD 136118 is a main sequence star of the spectral class F9 with an apparent visual magnitude of 6.9 mag. It belongs to Serpens Cauda and is around 50 parsecs (about 150 light years ) from the solar system. The star is orbited by a brown dwarf.
The star has 1.2 times the mass of the Sun , its radius is 1.7 times larger than that of the Sun and its effective temperature is 6200 Kelvin . The star takes about 12.2 days to complete one revolution on its own axis .
Substellar companion
In 2002 Fischer et al. the discovery of an object using the radial velocity method that orbits the star with a period of around 1200 days and was designated as HD 136118 b . Due to the minimum mass of almost 12 Jupiter's masses, the object was an exoplanet candidate. The inclination of the orbit could later be determined, resulting in an actual mass of approximately 42 Jupiter masses, making the object a brown dwarf .