Unlike the Hilda asteroids whose eccentricity is fairly common of main belt asteroids , Thule has a very low eccentricity - actually much lower than that of Jupiter itself and only a bit higher than that of Earth . Unlike the Hilda asteroids , whose eccentricity is fairly typical of main-belt asteroids , Thule has a very low eccentricity â `` actually much lower than that of Jupiter itself and only slightly higher than that of Earth .