HD 202206 c
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 202206 | |
| Constellation | Capricornus | |
| Right ascension | (α) | 21h 14m 57.79s |
| Declination | (δ) | -20° 47′ 20.1″ |
| Distance | 151.14 ly (46.3 pc) | |
| Spectral type | G6V | |
| Orbital elements | ||
| Semimajor axis | (a) | 2.55 AU |
| Eccentricity | (e) | 0.267±0.021 |
| Orbital period | (P) | 1383.4±18.4 d |
| Angular distance | (θ) | 55 mas |
| Longitude of periastron |
(ω) | 78.99±6.65° |
| Time of periastron | (T0) | 2,452,250 JD |
| Semi-amplitude | (K) | 42±1.5 m/s |
| Physical characteristics | ||
| Mass | (m) | >2.44 MJ |
| Discovery information | ||
| Discovery date | November 16, 2004 | |
| Discoverer(s) | Correia, Udry, Mayor et al. | |
| Detection method | Radial velocity | |
| Discovery status | Published | |
HD 202206 c is a planet discovered on November 16, 2004 by using long-term observation of formerly unconfirmed second planet after the discovery of brown dwarf (first companion) around the star.
The planet orbits 3.07 times further out and have 7.13 times less massive than first companion, making semi-amplitude much lower at only 42 m/s. The mass is 2.44 times Jupiter and 1.5% larger in radius. The orbital resonance of planet with brown dwarf is 5:1. The eccentricity of planet is higher than all of the planets and dwarf planets in our solar system except Eris, which has eccentricity of 0.44.
[edit] References
- Correia, A. C. M.; Udry, S.; Mayor, M.; Laskar, J.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C. (2004). "A pair of planets around HD 202206 or a circumbinary planet?": 9.
[edit] External links
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