]> 2012-02-07T10:39:42-08:00 AlphaOne:Gliese 581b 5.3683 9.3415356573251E+25 463821.12 Unknown 6133518004.2854 Orbits AlphaOne:Milky Way AlphaOne:Gliese 581 Location Semi major axis (m) m Semi major axis Planet class Orbital period (s) s Orbital period Mass (kg) kg Mass Eccentricity (days) days Eccentricity Planets