The colors reflect the composition of these asteroids, dry and stony in the center, water-rich and primitive towards the edge, water-rich asteroids which may have seeded the oceans and the seas that we find on our planet when they bombarded the Earth at an earlier time.
颜色可以反映这些小行星的成分。 中间的干燥多岩石， 边缘的富含水分，成分原始， 这些富含水分的小行星， 可能正是它们早期撞击地球时 为地球带来了海洋的种子。