Eccentric Jupiter

An eccentric Jupiter is a Jovian planet that orbits its star in an eccentric orbit. Note: this study treats eccentric Jupiters as giant planets having an orbital eccentricity of 0.1 or greater. 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.
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.
Possible habitable zone planets near eccentric Jupiters:
Planet 	SMA 	ecc 	MJ 	Notes
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
==See also==
*Extrasolar planet
==References==
Category:Types of planet
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