HD 11964 d
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 1.13±0.04 AU |
| Eccentricity | (e) | 0.63+0.34-0.17 |
| Orbital period | (P) | 360±4 d |
| Angular distance | (θ) | 1.366 mas |
| Longitude of periastron |
(ω) | 40.2° |
| Time of periastron | (T0) | 2,411,892.03 JD |
| Semi-amplitude | (K) | 9.8 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.21+0.06-0.07 MJ |
| Discovery information | ||
| Discovery date | September 10, 2007 | |
| Discoverer(s) | Gregory et al. | |
| Detection method | radial velocity | |
| Discovery site | United States | |
| Discovery status | published | |
HD 11964 d is the second planet in order of distance from HD 11964. The planet is 70% the mass of Saturn, but since inclination is not known, only minimum mass is known. The orbit is extremely eccentric at the average distance of 1.13 AU, taking 360 days to complete its orbit.
The planet was discovered by using a new technique called Bayesian Kepler periodogram in September 2007 by P.C. Gregory. This technique finds trends in wobbling of stars more easier than other methods, and hence easier to detect multiple planetary systems.
[edit] References
- P.C. Gregory (Sept 6, 2007). "A Bayesian periodogram finds evidence for three planets in HD 11964".
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