Asteroid 1 Ceres - Evidence for water of hydration

Astronomy and Astrophysics – Astronomy

Scientific paper

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Absorption Spectra, Ceres Asteroid, Hydration, Infrared Spectra, Water, Astronomical Spectroscopy, Carbonaceous Chondrites, Meteoritic Composition, Reflectance

Scientific paper

An absorption feature centred near 3.0 microns has been discovered in the infrared spectrum of asteroid 1 Ceres. This spectrum has been compared with laboratory spectra of meteorites and shows great similarity to the spectra of type II carbonaceous chondrites. By analogy this suggests the presence of about 10-15 per cent water in the form of water of hydration on the surface of Ceres. This is the first evidence of water in the surface material of an asteroid.

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