東京大学 · 物理学・天文学
Okada教授の研究室では、小惑星探査ミッションを基盤として、地球外天体の表面物質の化学組成と熱物理的性質をX線フラーレンスケキシメトリーと赤外熱画像技術を用いて解明しています。特に、HayabusaおよびHayabusa2ミッションで得られた観測データを活用し、S型小惑星イトカワやC型小惑星リゆうの成り立ちや起源に関する知見を提供しています。また、惑星科学と宇宙探査技術の融合を図り、サンプル・リターンミッションのための着陸条件評価にも貢献しています。
Figures are computed from collected data and may differ slightly.
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 ordin
The thermal infrared imager TIR onboard Hayabusa2 has been developed to investigate thermo-physical properties of C-type, near-Earth asteroid 162173 Ryugu. TIR is one of the remote science instruments on Hayabusa2 designed to understand the nature of a volatile-rich solar system small body, but it also has significant mission objectives to provide information on surface physical properties and conditions for sampling site selection as well as the assessment of safe landing operations. TIR is bas
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