HD 188015
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Stern HD 188015 |
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| AladinLite | |||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | Fox | ||||||||
| Right ascension | 19 h 52 m 4.54 s | ||||||||
| declination | + 28 ° 06 ′ 1.4 ″ | ||||||||
| Apparent brightness | 8.24 likes | ||||||||
| Typing | |||||||||
| Known exoplanets | 1 | ||||||||
| Spectral class | G5 IV | ||||||||
| Astrometry | |||||||||
| Radial velocity | (0.0 ± 0.2) km / s | ||||||||
| parallax | (17.54 ± 0.85) mas | ||||||||
| distance | (185.9 ± 9.0) Lj (57.0 ± 2.8) pc |
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| Visual absolute brightness M vis | +4.46 mag | ||||||||
| Proper movement | |||||||||
| Rec. Share: | (53.71 ± 0.52) mas / a | ||||||||
| Dec. portion: | (−91.56 ± 0.69) mas / a | ||||||||
| Physical Properties | |||||||||
| Dimensions | 1.09 M ☉ | ||||||||
| radius | 1.1 R ☉ | ||||||||
| Effective temperature | 5520 K | ||||||||
| Metallicity [Fe / H] | 0.29 | ||||||||
| Age | 6.2 x 10 9 a | ||||||||
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Other names and catalog entries |
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HD 188015 is a yellow sub-giant in the constellation Fox, 171.58 light-years from Earth . It has an apparent magnitude of 8.22 mag, so it is not visible to the naked eye. Its mass roughly corresponds to that of the sun, but it is significantly older, has probably already completed the fusion of hydrogen and now draws its energy from the fusion of helium nuclei . HD 188015 is about twice as metallic as the sun. In 2005, Geoffrey Marcy discovered an extrasolar planet orbiting this star. It bears the name HD 188015 b .
Web links
Individual evidence
- ↑ a b c Hipparcos catalog (ESA 1997)
- ↑ Pulkovo radial velocities for 35493 HIP stars
- ↑ a b c Hipparcos, the New Reduction (van Leeuwen, 2007)