Evidence of hydrated and/or hydroxylated minerals on the surface of asteroid 4 Vesta

Details Evidence of hydrated and/or hydroxylated minerals on the surface of asteroid 4 Vesta Evidence of hydrated and/or hydroxylated minerals on the surface of asteroid 4 Vesta

Nov 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003georl..30upla2h&link_type=abstract

Geophysical Research Letters, Volume 30, Issue 21, pp. PLA 2-1, CiteID 2123, DOI 10.1029/2003GL018627

Physics

13

Planetary Sciences: Surface Materials And Properties, Planetary Sciences: Origin And Evolution, Planetology: Solar System Objects: Asteroids And Meteoroids

Scientific paper

Asteroid 4 Vesta is thought to be a differentiated object with intact internal structure due to its achondritic surface. In this paper, we report K-L band spectroscopic observations of Vesta. We have detected the presence of a 3-μm absorption feature at about the 1% level on the surface of Vesta at longitudes between 155° and 195°. This result indicates that OH and/or H2O-bearing minerals are present in this region of Vesta; the sources are plausibly fragments of carbonaceous chondrite impactors or solar wind implantation. The detection of 3-μm absorption features from Vesta, regarded as the smallest terrestrial planet, may provide clues to the origin of volatile materials on terrestrial planets.

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