title: The elemental composition of asteroid 433 eros: results of the NEAR-shoemaker X-ray spectrometer
abstract: We report major element composition ratios for regions of the asteroid 433 Eros imaged during two solar flares and quiet sun conditions during the period of May to July 2000. Low aluminum abundances for all regions argue against global differentiation of Eros. Magnesium/silicon, aluminum/silicon, calcium/silicon, and iron/silicon ratios are best interpreted as a relatively primitive, chondritic composition. Marked depletions in sulfur and possible aluminum and calcium depletions, relative to ordinary chondrites, may represent signatures of limited partial melting or impact volatilization.
authors.affiliation: Goddard Space Flight Center, Code 691, Greenbelt, MD 20771, USA. Space Sciences Building, Cornell University, Ithaca, NY 14853, USA. Max-Planck-Institut fur Chemie, Postfach 3060, D-55020 Mainz, Germany. Department of Planetary Science, Spac.
authors.initials: JI
authors.lastname: Trombka
authors.initials: SW
authors.lastname: Squyres
authors.initials: J
authors.lastname: Bruckner
authors.initials: WV
authors.lastname: Boynton
authors.initials: RC
authors.lastname: Reedy
authors.initials: TJ
authors.lastname: McCoy
authors.initials: P
authors.lastname: Gorenstein
authors.initials: LG
authors.lastname: Evans
authors.initials: JR
authors.lastname: Arnold
authors.initials: RD
authors.lastname: Starr
authors.initials: LR
authors.lastname: Nittler
authors.initials: ME
authors.lastname: Murphy
authors.initials: I
authors.lastname: Mikheeva
authors.initials: RL
authors.lastname: McNutt
authors.initials: TP
authors.lastname: McClanahan
authors.initials: E
authors.lastname: McCartney
authors.initials: JO
authors.lastname: Goldsten
authors.initials: RE
authors.lastname: Gold
authors.initials: SR
authors.lastname: Floyd
authors.initials: PE
authors.lastname: Clark
authors.initials: TH
authors.lastname: Burbine
authors.initials: JS
authors.lastname: Bhangoo
authors.initials: SH
authors.lastname: Bailey
authors.initials: M
authors.lastname: Petaev