HD 164922 b
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 164922 | |
| Constellation | Hercules | |
| Right ascension | (α) | 18h 02m 30.86s |
| Declination | (δ) | +26° 18′ 46.81″ |
| Distance | 71.5 ly (21.93 pc) | |
| Spectral type | K0V | |
| Orbital elements | ||
| Semimajor axis | (a) | 2.11±0.13 AU |
| Eccentricity | (e) | 0.05±0.14 |
| Orbital period | (P) | 1155±23 d |
| Angular distance | (θ) | 96.215 mas |
| Longitude of periastron |
(ω) | 195° |
| Time of periastron | (T0) | 2,411,100±280 JD |
| Semi-amplitude | (K) | 7.3±1.2 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.36±0.046 MJ |
| Discovery information | ||
| Discovery date | July 15, 2006 | |
| Discoverer(s) | Butler et al. | |
| Detection method | Radial velocity | |
| Discovery site | California, USA | |
| Discovery status | Published | |
HD 164922 b is a water jovian extrasolar planet orbiting around orange dwarf star HD 164922, located in Hercules constellation at a distance of 71.5 light years from Earth. It was the first long period saturnian planet discovered. Its inclination is not known, and its true mass may be slightly greater. The angular separation between the companion planet and host star is nearly 100 mas. The planet also has a low eccentricity, unlike most other long period extrasolar planets – 0.05 – about the same as Jupiter and Saturn in our own solar system.
[edit] References
- Butler et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646 (1): 505 – 522. (web Preprint)
[edit] See also
[edit] External links
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