HD 169830
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Star HD 169830 |
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| AladinLite | |||||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Sagittarius | ||||||||||||
| Right ascension | 18 h 27 m 49.48 s | ||||||||||||
| declination | -29 ° 49 ′ 0.7 ″ | ||||||||||||
| Apparent brightness | 5.9 likes | ||||||||||||
| Typing | |||||||||||||
| Known exoplanets | 2 | ||||||||||||
| B − V color index | +0.52 | ||||||||||||
| Spectral class | F8 V | ||||||||||||
| Astrometry | |||||||||||||
| Radial velocity | (−17.4 ± 0.2) km / s | ||||||||||||
| parallax | (27.32 ± 0.41) mas | ||||||||||||
| distance | (119 ± 2) ly (36.6 ± 0.6) pc |
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| Visual absolute brightness M vis | +3.08 mag | ||||||||||||
| Proper movement | |||||||||||||
| Rec. Share: | (−1.39 ± 0.55) mas / a | ||||||||||||
| Dec. portion: | (16.11 ± 0.32) mas / a | ||||||||||||
| Physical Properties | |||||||||||||
| Dimensions | approx. 1.4 M ☉ | ||||||||||||
| radius | approx. 1.2 R ☉ | ||||||||||||
| Effective temperature | (6300 ± 50) K. | ||||||||||||
| Metallicity [Fe / H] | +0.21 ± 0.05 | ||||||||||||
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Other names and catalog entries |
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HD 169830 is a main sequence star of the spectral class F8 in the constellation Sagittarius, about 120 light years away . Its mass is around 1.4 solar masses . The star is orbited by two spectroscopic companions known as HD 169830 b and HD 169830 c, which could be exoplanets. The discovery of the first companion was published in 2001, and that of the second followed three years later.
companion
The inner companion, HD 169830 b , orbits the central star with a period of around 226 days and has a minimum mass of around 2.9 Jupiter's masses. The outer companion, HD 169830 c , has a period of just over 2000 days and a minimum mass of about 4 Jupiter's masses.