@inproceedings{oai:jaxa.repo.nii.ac.jp:00020485,
 author = {井上, 朋香 and 小川, 和律 and 岡田, 達明 and 白井, 慶 and 山本, 幸生 and 荒井, 武彦 and 加藤, 學 and Inoue, Tomoka and Ogawa, Kazunori and Okada, Tatsuaki and Shirai, Kei and Yamamoto, Yukio and Arai, Takehiko and Kato, Manabu},
 book = {第39回月・惑星シンポジウム, Proceedings of the 39th ISAS Lunar and Planetary Symposium},
 month = {Aug},
 note = {XRS (X-Ray Spectrometer) onboard Hayabusa (MUSES-C: Asteroid Sample-return Spacecraft) observed XRF (X-Ray Fluorescence) from near-Earth asteroid 25143 Itokawa to determine major elemental composition. Okada et al. (2006) reported average elemental mass ratios of Mg/Si = 0.78 +/- 0.09 and Al/Si = 0.07 +/- 0.03. In this study we attempted to estimate the upper limits of elemental mass ratios of Ca and Fe. The preliminary results are Fe/Si = 1.0 +/- 0.5 and Ca/Si = 0.09 +/- 0.04 respectively. Fe/Si likely indicates LL- or L-Chondrite composition, but a primitive achondrite such as Acapulcoite still remains. Meanwhile, Ca/Si reveals LL-, L- or H-Chondrite composition, but some primitive achondrites (Winonate, Aubrite) cannot be ruled out. Acalucoites and Lodranites are plotted out of the error bars., 資料番号: AA0063505023},
 pages = {88--91},
 publisher = {宇宙航空研究開発機構宇宙科学研究本部, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA/ISAS)},
 title = {Ca and Fe abundance on the surface of asteroid Itokawa constrained by Hayabusa X-ray fluorescence spectrometer},
 year = {2006}
}