Aqueous alteration on main belt primitive asteroids: Results from visible spectroscopy

No correlation is found between the aqueous alteration process and the asteroids albedo or orbital elements. Comparing the ∼0.7μm band parameters of hydrated silicates and CM2 carbonaceous chondrites, the meteorites that have aqueous altered asteroids as parent bodies, we see that the band center of meteorites is at longer wavelengths than that of asteroids. This difference on center positions may be attributed to different minerals abundances, and to the fact that CM2 available on Earth might not be representative of the whole aqueous altered asteroids population.