 Amalthea orbits Jupiter at a distance of 181 000 km ( 2 @.@ 54 Jupiter radii ) . The orbit of Amalthea has an eccentricity of 0 @.@ 003 and an inclination of 0 @.@ 37 ° relative to the equator of Jupiter . Such appreciably nonzero values of inclination and eccentricity , though still small , are unusual for an inner satellite and can be explained by the influence of the innermost Galilean satellite , Io : in the past Amalthea has passed through several mean @-@ motion resonances with Io that have excited its inclination and eccentricity ( in a mean @-@ motion resonance the ratio of orbital periods of two bodies is a rational number like m : n ) . 
