HD 208487
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Stern HD 208487 |
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| AladinLite | |||||||||||
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Observation dates equinox : J2000.0 , epoch : J2000.0 |
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| Constellation | crane | ||||||||||
| Right ascension | 21 h 57 m 19.8 s | ||||||||||
| declination | -37 ° 45 ′ 49 ″ | ||||||||||
| Apparent brightness | 7.5 likes | ||||||||||
| Typing | |||||||||||
| Known exoplanets | 1 | ||||||||||
| Spectral class | G2 V | ||||||||||
| Astrometry | |||||||||||
| Radial velocity | (+5.3 ± 0.2) km / s | ||||||||||
| parallax | (21.81 ± 0.65) mas | ||||||||||
| distance | (150 ± 4) ly (45.9 ± 1.4) pc |
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| Physical Properties | |||||||||||
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Other names and catalog entries |
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HD 208487 is a star with an apparent magnitude of 7.5 mag in the constellation Grus .
General Information
Like our sun, the star is counted among the yellow dwarfs . Its mass is probably lower than that of the Sun, but its brightness is a little greater. This suggests that the star is older than our sun. In 2004 a companion of the star was discovered which was named HD 208487 b .
Data of the star
The spectral type of the star is G2V, like that of our sun . Its distance to earth is around 46 parsecs , and its mass is 1.3 times that of the sun. The surface temperature of HD 208487 is 5229 Kelvin . The diameter of the star is larger by a factor of 1.15 compared to the sun.
Dates of the planet
Since the methods used to search for planets make it easier to find very heavy objects than light ones, most of the exoplanets discovered so far are significantly heavier than the heaviest planet in our solar system, Jupiter . It is therefore noticeable that HD 208487 b has a very low mass with Jupiter's 0.43 masses . It is believed that the planet is also a gas planet . It orbits its sun at a distance of 0.52 AU in 128.8 days . The eccentricity of its orbit is 0.38 and is therefore very high. Some data suggest that there may be a second planet in this system , but this assumption has not yet been confirmed.