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Asteroid surface materials: Mineralogical characterizations from reflectance spectraMineral assemblages analogous to most meteorite types, with the exception of ordinary chondritic assemblages, have been found as surface materials of Main Belt asteroids. C1- and C2-like assemblages (unleached, oxidized meteoritic clay minerals plus opaques such as carbon) dominate the population throughout the Belt, especially in the outer Belt. A smaller population of asteroids exhibit surface materials similar to C3 (CO, CV) meteoritic assemblages (olivine plus opaque, probably carbon) and are also distributed throughout the Belt. The majority of remaining studied asteroids (20) of 65 asteroids exhibit spectral reflectance curves dominated by the presence of metallic nickel-iron in their surface materials. The C2-like materials which dominate the main asteroid belt population appear to be relatively rare on earth-approaching asteroids.
Document ID
19780003049
Acquisition Source
Legacy CDMS
Document Type
Contractor Report (CR)
Authors
Gaffey, M. J. (Hawaii Univ. Honolulu, HI, United States)
Mccord, T. B. (Hawaii Univ. Honolulu, HI, United States)
Date Acquired
September 3, 2013
Publication Date
January 1, 1977
Subject Category
Lunar And Planetary Exploration
Report/Patent Number
PUBL-151
NASA-CR-154510
Accession Number
78N10992
Funding Number(s)
CONTRACT_GRANT: NSG-7310
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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