An eccentric Jupiter is a Jovian planet that orbits its star in an eccentric orbit. Eccentric Jupiters may disqualify a planetary system from having Earth-like planets in it because a massive gas giant with an eccentric orbit may remove all Earth mass planets from the habitable zone.
To date, it appears that approximately 7% of all stars (half of the known planetary systems) have an eccentric Jupiter (e > 0.1), making these planets more common than Hot Jupiters.Template:Citation needed
Out of the more than 200 extrasolar planet discoveries (as of 2006), 15 planets have high eccentricities (e > 0.6).
The typical exoplanet with an orbital period greater than 5 days has a median eccentricity of 0.23.
|HD 3651 b||0.29||0.61||0.22||Might allow for planets at or beyond 0.6 AU|
|HD 37605 b||0.26||0.73||2.84||Might allow for planets at or beyond 0.8 AU|
|HD 45350 b||1.92||0.77||1.79||Restricted stable orbits to the innermost 0.2 AU|
|HD 80606 b||0.45||0.93||4.0||Only beyond 1.75 AU did test particles remain|
|HD 20782 b||1.381||0.97||2.620|
|HD 89744 b||0.93||0.67||8.58||No terrestrial planets in the habitable zone|
|16 Cygni Bb||1.68||0.68||1.68||No terrestrial planets in the habitable zone|
- ↑ Raymond, Sean N.; Quinn, Thomas; Lunine, Jonathan I. (March 2004). Making other earths: dynamical simulations of terrestrial planet formation and water delivery. Icarus 168 (1): 1–17. Note: this study treats eccentric Jupiters as giant planets having an orbital eccentricity of 0.1 or greater.
- ↑ 2.0 2.1 Wittenmyer et al. (2007). Dynamical and Observational Constraints on Additional Planets in Highly Eccentric Planetary Systems. The Astronomical Journal 134 (3): 1276–1284.
- ↑ Kathryn; Fischer; Marcy; et al. (2009). Old, Rich, and Eccentric: Two Jovian Planets Orbiting Evolved Metal-Rich Stars. Publications of the Astronomical Society of the Pacific 121 (880): 613–620.
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