Английская Википедия:HD 158259
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HD 158259 is a main sequence star located Шаблон:Convert away in the constellation Draco. It hosts a system of at least five planets, discovered by the SOPHIE échelle spectrograph using the radial velocity method.[1]
Characteristics
HD 158259 is a G0 star with a rotation period of Шаблон:Val days. More detailed analysis of the spectral assigns a class of G5V, but with the metal lines of an F9 star.[2]
Planets
Five planets have been confirmed orbiting HD 158259, along with one unconfirmed planet. These planets were discovered by N.C. Hara et.al. by the radial velocity method, published in Astronomy & Astrophysics in April 2020.[3] The innermost planet, HD 158259 b, was also observed to transit the star by TESS.[1] The planets orbit in a nearly 3:2 orbital resonance, with the period ratios 1.5758, 1.5146, 1.5296, 1.5130, and 1.4480, respectively, starting from the innermost pairing.[4] A dynamical analysis has shown that the system is stable.[1] One of the planets, HD 158259 b, is a super-Earth; the rest, including the unconfirmed HD 158259 g, are mini-Neptunes.[3]
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See also
- List of exoplanets discovered in 2020 - HD 158259 b, c, d, e, and f
References
- Английская Википедия
- Draco (constellation)
- G-type main-sequence stars
- Henry Draper Catalogue objects
- Hipparcos objects
- Planetary systems with five confirmed planets
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