X-ray Fluorescence Spectrometry of Asteroid Itokawa by Hayabusa

Details X-ray Fluorescence Spectrometry of Asteroid Itokawa by Hayabusa X-ray Fluorescence Spectrometry of Asteroid Itokawa by Hayabusa

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006sci...312.1338o&link_type=abstract

Science, Volume 312, Issue 5778, pp. 1338-1341 (2006).

Computer Science

33

Scientific paper

X-ray fluorescence spectrometry of asteroid 25143 Itokawa was performed by the x-ray spectrometer onboard Hayabusa during the first touchdown on 19 November 2005. We selected those data observed during relatively enhanced solar activity and determined average elemental mass ratios of Mg/Si = 0.78 +/- 0.09 and Al/Si = 0.07 +/- 0.03. Our preliminary results suggest that Itokawa has a composition consistent with that of ordinary chondrites, but primitive achondrites cannot be ruled out. Among ordinary chondrites, LL- or L-chondrites appear to be more likely than H-chondrites. No substantial regional difference was found on the asteroid surface, indicating its homogeneity in composition.

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