HD 168443
Stern HD 168443 |
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AladinLite | |||||||||||||
Observation dates equinox : J2000.0 , epoch : J2000.0 |
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Constellation | Snake | ||||||||||||
Right ascension | 18 h 20 m 3.93 s | ||||||||||||
declination | -09 ° 35 ′ 44.6 ″ | ||||||||||||
Apparent brightness | 6.92 mag | ||||||||||||
Typing | |||||||||||||
Spectral class | G5 | ||||||||||||
Astrometry | |||||||||||||
Radial velocity | (−48.7 ± 0.2) km / s | ||||||||||||
parallax | (26.72 ± 0.69) mas | ||||||||||||
distance | (122 ± 3) ly (37.4 ± 1.0) pc |
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Visual absolute brightness M vis | +4.05 mag | ||||||||||||
Proper movement | |||||||||||||
Rec. Share: | (−93.84 ± 0.76) mas / a | ||||||||||||
Dec. portion: | (−222.83 ± 0.56) mas / a | ||||||||||||
Physical Properties | |||||||||||||
Dimensions | 1.06 M ☉ | ||||||||||||
radius | (1.63 ± 0.08) R ☉ | ||||||||||||
Luminosity |
approx. 2.1 L ☉ |
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Metallicity [Fe / H] | 0.03 | ||||||||||||
Age | 9.8 · 10 9 a | ||||||||||||
Other names and catalog entries |
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HD 168443 is a star of the spectral class G6 at a distance of approx. 124 light years in the constellation Snake .
The star is accompanied by two substellar objects. The inner companion with the designation HD 168443 b could be an exoplanet , the outer companion with the designation HD 168443 c is a brown dwarf .
Inner companion
HD 168443 b is a substellar object which orbits the central star with a major semi-axis of about 0.3 astronomical units (AU) and an eccentricity of 0.53 in 58.11 days . The minimum mass M · sin (i) is approx. 8 Jupiter masses; thus HD 168443 b could be an exoplanet or a low-mass brown dwarf. The property was acquired by Butler et al. In 1998. discovered.
External companion
HD 168443 c is a brown dwarf with a period of 4.8 years. The major semiaxis of its orbit measures 2.9 AU, the orbital eccentricity is 0.21. The mass of HD 168443 c is estimated to be around 20 to 30 Jupiter masses with an upper limit of just over 40 Jupiter masses.
Web links
- HD 168443 (English) - Entry on the star and its companions in Extrasolar Planets Encyclopaedia
- HD 168443 (English) - Entry at SIMBAD