The first detection of water absorption on a D type asteroid

Details The first detection of water absorption on a D type asteroid The first detection of water absorption on a D type asteroid

Sep 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30qpla2k&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 17, pp. PLA 2-1, CiteID 1909, DOI 10.1029/2003GL017907

Physics

5

Planetology: Comets And Small Bodies: Composition, Planetology: Comets And Small Bodies: Ice, Planetology: Comets And Small Bodies: Origin And Evolution, Planetology: Comets And Small Bodies: Physics And Chemistry Of Materials, Planetology: Comets And Small Bodies: Surfaces And Interiors

Scientific paper

The D type asteroids are among the darkest objects known in our solar system. Here, we present infrared spectra of one of the main-belt D type asteroids, 773 Irmintraud. In contrast to previous observations of D type asteroids, we found a gap of reflectance around 3 μm in wavelength. The 3 μm gap is one of the spectral signatures of OH or H2O as water ice or in hydrous minerals, which had formed in the processes of aqueous alteration in the early solar system. We suggest that D type asteroids, which are all the while considered as unaltered primitive material, could be aqueously altered. Our data do support the presence of water on a compositionally primitive D type asteroid.

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