Английская Википедия:HD 22781

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HD 22781, is a single star about Шаблон:Val away. It is a K-type main-sequence star. The star’s age is poorly constrained at Шаблон:Val billion years, but is likely similar to that of the Sun.[1] HD 22781 is heavily depleted in heavy elements, having just 45% of Sun's concentration of iron,[2] yet is comparatively rich in carbon, having 90% of Sun`s abundance.[1]

An imaging survey in 2012 has failed to find any stellar companions, suggesting HD 22781 is a single star.[3]

Planetary system

In 2011 a transiting superjovian planet or brown dwarf b was detected on an extremely eccentric orbit.[4] It is located just outside of the conservative habitable zone of the parent star.[5] Planets around such metal-poor stars are rare; the only three known similar cases are HD 111232 and HD 181720.[6]

In 2012, a radial velocity data review indicated there are no additional giant planets in the system.[7] Шаблон:OrbitboxPlanet begin Шаблон:OrbitboxPlanet Шаблон:Orbitbox end

References

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Шаблон:Perseus (constellation)

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