The elemental composition of asteroid 433 Eros: Results of the NEAR-Shoemaker x-ray spectrometer

J. I. Trombka, S. W. Squyres, J. Bruckner, W. V. Boynton, R. C. Reedy, T. J. McCoy, P. Gorenstein, L. G. Evans, J. R. Arnold, R. D. Starr, L. R. Nittler, M. E. Murphy, I. Mikheeva, Jr McNutt, T. P. McClanahan, E. McCartney, J. O. Goldsten, R. E. Gold, S. R. Floyd, P. E. ClarkT. H. Burbine, J. S. Bhangoo, S. H. Bailey, M. Petaev

Research output: Contribution to journalArticle

101 Scopus citations


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.

Original languageEnglish (US)
Pages (from-to)2101-2105
Number of pages5
Issue number5487
StatePublished - Sep 22 2000
Externally publishedYes


ASJC Scopus subject areas

  • General

Cite this

Trombka, J. I., Squyres, S. W., Bruckner, J., Boynton, W. V., Reedy, R. C., McCoy, T. J., Gorenstein, P., Evans, L. G., Arnold, J. R., Starr, R. D., Nittler, L. R., Murphy, M. E., Mikheeva, I., McNutt, J., McClanahan, T. P., McCartney, E., Goldsten, J. O., Gold, R. E., Floyd, S. R., ... Petaev, M. (2000). The elemental composition of asteroid 433 Eros: Results of the NEAR-Shoemaker x-ray spectrometer. Science, 289(5487), 2101-2105.