RETRACTED: X-ray fluorescence spectrometry of asteroid Itokawa by Hayabusa (Retracted Article)

被引：74

作者：

Okada, Tatsuaki ^{[1
]}

Shirai, Kei

Yamamoto, Yukio

Arai, Takehiko

Ogawa, Kazunori

Hosono, Kozue

Kato, Manabu

机构：

[1] Japan Aerosp Explorat Agcy, Inst Space & Astronaut Sci, Kanagawa 2298510, Japan

[2] Univ Tokyo, Dept Earth & Planetary Sci, Tokyo 1130033, Japan

[3] Grad Univ Adv Studies, Dept Space & Astronaut Sci, Kanagawa 2298510, Japan

[4] Tokyo Inst Technol, Dept Earth & Planetary Sci, Tokyo 1528550, Japan

来源：

SCIENCE | 2006年 / 312卷 / 5778期

关键词：

D O I：

10.1126/science.1125731

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

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.

引用

页码：1338 / 1341

页数：4

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