Planetary System
In 2003, the jovian planet HD 108874 b was discovered by the US-based team Paul Butler, Geoffrey Marcy, Steven Vogt, and Debra Fischer. This planet receives the amount of insolation closest to Earth of any extrasolar planet. In 2005, further observations revealed this star has another jovian planet orbiting further out, designated as HD 108874 c. Those two planets are in a 4:1 orbital resonance. This means if HD 108874 b orbits the star four times, then HD 108874 c orbits only once, because the orbital period for planet c is four times longer than planet b.
| Companion |
Mass | Semimajor axis |
Orbital period |
Eccentricity | Radius |
|---|---|---|---|---|---|
| b | >1.34 ± 0.11 MJ | 1.053 ± 0.061 | 394.48 ± 0.60 | 0.128 ± 0.022 | — |
| c | >1.064 ± 0.099 MJ | 2.77 ± 0.16 | 1680 ± 24 | 0.273 ± 0.040 | — |
Read more about this topic: HD 108874
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