Mineralogical Variations within the S-Type Asteroid Class

  title={Mineralogical Variations within the S-Type Asteroid Class},
  author={Michael J. Gaffey and J F Bell and R. Hanbury Brown and Thomas H. Burbine and Jennifer Lynn Piatek and Kevin Lowell Reed and Damon A. Chaky},
Abstract A systematic spectral analysis has been Carried out on a large subset (39 of 144) of the S-type asteroid population. The S-asteroid class includes a number of distinct compositional subtypes [designated S(I)-S(VII)] which exhibit surface silicate assemblages ranging from pure olivine (dunites) through olivine-pyroxene mixtures to pure pyroxene or pyroxene-feldspar mixtures (basalts). S-asteroid absorption bands are weaker than expected for pure mafic silicate assemblages, indicating… 
Olivine-dominated asteroids: Mineralogy and origin
Abstract Olivine-dominated asteroids are a rare type of objects formed either in nebular processes or through magmatic differentiation. The analysis of meteorite samples suggest that at least 100
Mineralogies and source regions of near-Earth asteroids
Abstract Near-Earth Asteroids (NEAs) offer insight into a size range of objects that are not easily observed in the main asteroid belt. Previous studies on the diversity of the NEA population have
Mineralogical characterization of some V‐type asteroids, in support of the NASA Dawn mission★
We present new reflectance spectra of 12 V-type asteroids obtained at the 3.6 m Telescopio Nazionale Galileo (TNG) covering the spectral range 0.7 to 2.5 μm. This spectral range, encompassing the 1
Olivine-Pyroxene Distribution of S-type Asteroids Throughout the Main Belt
The mineralogical composition of asteroids can be constrained using visible and near-IR (VNIR) spectroscopy. The most prominent spectral features observed over this wavelength range are due to
Spectral mixing models of S‐type asteroids
We present the results of mixing model determinations of S-type asteroid mineralogies using the Hapke spectral theory. The goal is to quantify uncertainties resulting from poorly constrained model
Surface Pyroxenes and Olivines of S-Type Asteroids as Studied by Modeling Their Reflectance Spectra
We model the reflectance spectra of SI–SVII-subtype asteroids. The spectra of minor planets contain little information as regards the abundance of free metal and the form of its existence on the
Spectral properties and mineral compositions of acapulcoite-lodranite clan meteorites: Establishing S-type asteroid-meteorite connections
Except for asteroid sample return missions, measurements of the spectral properties of both meteorites and asteroids offer the best possibility of linking meteorite groups with their parent
High-calcium pyroxene as an indicator of igneous differentiation in asteroids and meteorites
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Spectroscopic survey of M-type asteroids
Abstract M-type asteroids, as defined in the Tholen taxonomy (Tholen, D.J. [1984]. Asteroid Taxonomy from Cluster Analysis of Photometry. Ph.D. Dissertation, University of Arizona, Tucson), are
Composition and origin of L5 Trojan asteroids of Mars: Insights from spectroscopy
Abstract We investigate the mineralogical makeup of L5 Martian Trojan asteroids via reflectance spectroscopy, paying special attention to (101429) 1998 VF31, the only L5 Trojan that does not belong