Planetary System
On November 6, 2009, the discovery of a planetary companion around primary star Gamma-1 Leonis was announced. The radial velocity measurements suggest two additional periodicities of 8.5 and 1340 days. The former is likely due to stellar pulsation, whereas the latter could be indicative of the presence of an additional planetary companion with 2.14 Jupiter masses, moderate eccentricity (e=0.13) and located at 2.6 Astronomical Units away from the giant star. Nevertheless the nature of such a signal is still unclear and further investigations are needed to confirm or rule out an additional substellar companion.
| Companion |
Mass | Semimajor axis |
Orbital period |
Eccentricity | Radius |
|---|---|---|---|---|---|
| b | ≥8.78 MJ | 1.19 | 429 | 0.14 | — |
| c | ≥2.14 MJ | 2.6 | 1340 | 0.13 | — |
Read more about this topic: Gamma Leonis
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