HD 28185
Encyclopedia : H : HD : HD2 : HD 28185
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HD 28185 is a yellow main sequence star similar to our Sun located about 129 light years away in the constellation Eridanus. As of 2006 it is known to possess one long-period extrasolar planet.
Distance, age and mass
According to measurements from the Hipparcos astrometric satellite, the star's parallax is 25.28 milliarcseconds, which corresponds to a distance of 39.6 parsecs. Based on the star's chromospheric activity, HD 28185 is estimated to have an age of around 2,900 million years. On the other hand, evolutionary models give an age of around 7,500 million years and a mass 0.99 times that of our Sun.
Planetary system
In 2001 an extrasolar planet designated HD 28185 b was discovered in orbit around the star with a period of 1.04 years. Unlike many long-period extrasolar planets, it has a low orbital eccentricity. The planet experiences similar insolation to Earth, which has led to speculations about the possibilities for habitable moons. Numerical simulations suggest that low-mass planets located in the gas giant's Trojan points would be stable for long periods.The star also shows evidence of a long-term radial velocity trend, which may indicate the presence of an additional outer companion.
| Companion (In order from star) | (Jupiter (planet)>MJ) | Orbital period (days) | (Astronomical unit>AU) | Eccentricity |
|---|---|---|---|---|
| b | >5.7 | 383 ± 2 | 1.03 ± 2 | 0.07 ± 0.04 |
See also
References
External links
- [SIMBAD: HD 28185]
- [Extrasolar Planets Encyclopaedia: HD 28185] + [HD 28185 b]
- [Extrasolar Visions: HD 28185] + [HD 28185 b]
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