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Compositional structure of the asteroid beltA variety of observations, mainly albedos derived from 10 and 20 micron radiometry and eight-filter broadband spectrophotometry, were used to show that the asteroid belt is highly structured in composition. The bias-corrected distribution from 1.8 to 5.2 A.U. of the previously defined compositional types C,S,E,R, and M, plus type D and the newly described types F and P, are reported on. In terms of the relative abundances of the types discussed, the asteroid belt appears to be composed of at least six major compositionally distinct regions. The inferred composition of the asteroids in each semimajor axis region is consistent with the theory that the asteroids accreted from the solar nebula at or near their present location.
Document ID
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
Gradie, J.
(Cornell University Ithaca, NY, United States)
Tedesco, E.
(California Institute of Technology, Jet Propulsion Laboratory, Pasadena, CA; Arizona, University Tucson, AZ, United States)
Date Acquired
August 10, 2013
Publication Date
June 25, 1982
Publication Information
Publication: Science
Volume: 216
Subject Category
Lunar And Planetary Exploration
Accession Number
Distribution Limits

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