Profile Information
- Affiliation
- Associate Professor, Institute of Space and Astronautical Science, Japan Aerospace Exploration AgencyGraduate School of Science, Department of Chemistry, The University of Tokyo
- Degree
- Ph.D.(Mar, 1996, University of Tokyo)
- Researcher number
- 30321566
- J-GLOBAL ID
- 201501026547105146
- researchmap Member ID
- B000243484
- External link
専門は惑星科学、惑星物理学、惑星物質・物性科学、惑星探査科学。特に熱赤外カメラを用いた史上初の小惑星探査により、惑星探査に「熱撮像」の手法を世界で初めて導入に成功し、さらに「太陽系物性科学」の分野を創設。観測機器の開発による惑星探査でのその場観測とサンプルリターンによる帰還試料分析を主な研究手法とする。
主要な開発機器は、蛍光X線分光計、熱赤外カメラ、多波長熱赤外カメラである。また開発中のものはマルチターン飛行時間型質量分析計等である。地上分析においてはハイパースペクトル顕微鏡(フランスIAFとの共同)やロックインサーモグラフィ法による熱拡散率顕微鏡(石崎拓也氏と共同)による帰還試料の分析の他、将来の資料熱物性分析のための多色熱赤外顕微鏡の開発を推進中である。
◆国内外の惑星探査計画(観測機器担当)
・月探査「Lunar-A」 光学カメラLIC(Co-I)1993-2005
・火星探査「のぞみ」 HFレーダ高度計PWS/ALT(Co-I)1994-2003、可視カメラMIC(Co-I)1995-2003
・小惑星探査「はやぶさ」 蛍光エックス線分光計XRS担当(PI)1995-2010
・月周回探査「かぐや(SELENE)」 蛍光X線分光計XRS担当(PI)1998-2009
・小惑星探査「はやぶさ2」 中間赤外カメラTIR担当(PI)2010-present.、
・小惑星探査「はやぶさ2」 小型ランダーMASCOT担当(JAXAリエゾン)2010-2019
・小惑星探査「はやぶさ2」 デジタルエレキDE担当(PI)2010-present
・小惑星探査「はやぶさ2」 ハイパースペクトル顕微鏡MicrOmega担当(Co-PI)2019-present
・二重小惑星探査計画Hera 熱赤外カメラTIRI担当(PI)2020-present
・二重小惑星探査計画Hera Hera Investigation Team メンバ(招聘)2020-present
・地球近傍遭遇小惑星探査計画RAMSES 熱赤外カメラTIRI担当(PI)2025-present
◆帰還サンプルの分析(地上分析)
・JAXAキュレーションセンター(地球外物質研究グループ所属)2009-present
・ハイパースペクトル顕微鏡MicrOmega-CF(Co-PI)
・熱赤外顕微鏡(PI)
◆海外ミッション参画
・SMART-1 D-CIXS(Co-I)2000-2005
・Chandrayaan-1 C1XS(Co-I)2006-2009
・BepiColombo MIXS(Co-I)2003-present、SIXS (Co-I)2003-present
・Hera (-JP) Proejct Manager & TIRI(PI)2020-present、Investigation Team 2020-present
◆WG参画
・ESA MarcoPolo(=Hayabusa-MkII)においてX線分光、熱積外カメラ、着陸機
・月着陸機SELENE-B、SELENE-II
・月着陸SLIM(科学システム検討担当)
・火星探査MELOS(科学システム検討担当(固体惑星)、着陸探査)
・OKEANOS (科学システム検討担当、質量分析計HRMSの開発)
・月縦孔探査Uzume(科学システム検討担当、熱赤外カメラの開発)
・次世代小天体サンプルリターン理学WG(代表)
Research Interests
32Research Areas
1Research History
7-
Sep, 2006 - Present
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Oct, 2003 - Aug, 2006
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Feb, 1999 - Sep, 2003
Education
4Committee Memberships
3-
Aug, 2012 - Aug, 2013
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Aug, 2010 - Aug, 2012
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Aug, 2009 - Aug, 2010
Awards
24-
Dec, 2020
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Nov, 2020
Papers
258-
Nature Communications, Nov 4, 2025
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Meteoritics & Planetary Science, Nov 25, 2024Abstract Nucleosynthetic isotope variations are powerful tracers to determine genetic relationships between meteorites and planetary bodies. They can help to link material collected by space missions to known meteorite groups. The Hayabusa 2 mission returned samples from the Cb‐type asteroid (162173) Ryugu. The mineralogical, chemical, and isotopic characteristics of these samples show strong similarities to carbonaceous chondrites and in particular CI chondrites. The nucleosynthetic isotope compositions of Ryugu overlap with CI chondrites for several elements (e.g., Cr, Ti, Fe, and Zn). In contrast to these isotopes, which are of predominately supernovae origin, s‐process variations in Mo isotope data are similar to those of carbonaceous chondrites, but even more s‐process depleted. To further constrain the origin of this depletion and test whether this signature is also present for other s‐process elements, we report Zr isotope compositions for three bulk Ryugu samples (A0106, A0106‐A0107, C0108) collected from the Hayabusa 2 mission. The data are complemented with that of terrestrial rock reference materials, eucrites, and carbonaceous chondrites. The Ryugu samples are characterized by distinct 96Zr enrichment relative to Earth, indicative of a s‐process depletion. Such depletion is also observed for carbonaceous chondrites and eucrites, in line with previous Zr isotope work, but it is more extreme in Ryugu, as observed for Mo isotopes. Since s‐process Zr and Mo are coupled in mainstream SiC grains, these distinct s‐process variations might be due to SiC grain depletion in the analyzed materials, potentially caused by incomplete sample digestion, because the Ryugu samples were dissolved on a hotplate only to avoid high blank levels for other elements (e.g., Cr). However, local depletion of SiC grains cannot be excluded. An alternative, equally possible scenario is that aqueous alteration redistributed anomalous, s‐process‐depleted, Zr on a local scale, for example, into Ca‐phosphates or phyllosilicates.
Misc.
536-
Abstracts of Annual Meeting of the Geochemical Society of Japan, 62nd 227-227, 2015木星のラグランジュ点付近に存在するトロヤ群小惑星の起源は、よくわかっていない。我々は(1)種々の氷・含水鉱物・有機物が特徴的な吸収を持つ赤外域(とくに2500$\sim$5000 nmの波長域)でトロヤ群小惑星のイメージング分光を行う母機(2)小惑星表面に降り立ち揮発性の高い炭素・水素・窒素・酸素などの同位体比をその場測定する子機、から成るソーラー電力セイル探査機の検討をすすめている。2020年代に打ち上げるために進行中の、ミッション設計・探査候補天体のサーベイ・搭載機器開発について報告する。
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METEORITICS & PLANETARY SCIENCE, 49 A196-A196, Sep, 2014
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METEORITICS & PLANETARY SCIENCE, 49 A317-A317, Sep, 2014
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METEORITICS & PLANETARY SCIENCE, 49 A443-A443, Sep, 2014
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METEORITICS & PLANETARY SCIENCE, 49 A409-A409, Sep, 2014
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METEORITICS & PLANETARY SCIENCE, 49 A408-A408, Sep, 2014
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METEORITICS & PLANETARY SCIENCE, 49 A444-A444, Sep, 2014
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METEORITICS & PLANETARY SCIENCE, 49 A445-A445, Sep, 2014
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Aug, 201447th ISAS Lunar and Planetary Symposium (August 4-6, 2014. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (JAXA)(ISAS)), Sagamihara, Kanagawa Japan
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Proceedings of Japan Geoscience Union Meeting 2014, Apr, 2014
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Digests of 14th Space Science Symposium, S2-011, Jan, 2014
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EARTH PLANETS AND SPACE, 61st 184-184, 2014
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Proceedings of JSPE Semestrial Meeting, 2014 753-754, 2014The performance of wire-sawing in vacuum has been investigated for future lunar and planetary explorations. Nickel fixing abrasives adhered on a rock specimen in vacuum and the rock was hardly cut. In this report, the causes of the adhesion were estimated by friction tests. The nickel surface became oxide in air and more brittle than pure nickel. Consequently, nickel was removed in air. On the other hand, nickel was not oxidized in vacuum and was still tough and soft after rubbing. In addition, debris adhered on the machined area by electrostatics. Consequently, the abrasives slipped on the nickel and machining did not progress.
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日本惑星科学会秋期講演会予稿集, 2013 "P3-03", Nov 20, 2013
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Proceedings of International Astrobiology Workshop 2013, 1049, Nov, 2013
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Proceedings of 2013 Fall Meeting of the Japanese Society for Planetary Sciences, Nov, 2013
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METEORITICS & PLANETARY SCIENCE, 48 A33-A33, Jul, 2013
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Abstracts of 10th Annual Meeting of Asia Oceania Geosciences Society (AOGS 2013), PS03-A040, Jun, 2013 Peer-reviewed
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Japan Geoscience Union Meeting 2013, PPS04-06, May, 2013
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宇宙航空研究開発機構特別資料 JAXA-SP-, (12-012E) 1-50, Mar 29, 2013
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Proceedings of 57th Symposium on Space Science and Technology, 57th JSASS-2013-4300, 2013
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Proceedings of 57th Symposium on Space Science and Technology, 57th JSASS-2013-4299, 2013
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Proceedings of the International Astronautical Congress, IAC, 2 1239-1250, 2013
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INFRARED REMOTE SENSING AND INSTRUMENTATION XXI, 8867, 2013 Peer-reviewed
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Planetary People - The Japanese Society for Planetary Sciences, 22(2) 68-77, 2013
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Planetary People - The Japanese Society for Planetary Sciences, 22(2) 68-77, 2013
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日本惑星科学会秋期講演会予稿集, 2012 30-30, Oct 24, 2012
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METEORITICS & PLANETARY SCIENCE, 47 A387-A387, Jul, 2012
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METEORITICS & PLANETARY SCIENCE, 47 A421-A421, Jul, 2012
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METEORITICS & PLANETARY SCIENCE, 47 A422-A422, Jul, 2012
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METEORITICS & PLANETARY SCIENCE, 47 A35-A35, Jul, 2012
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Proceedings of Asteroids, Comets, Meteors 2012, 11 6137, May, 2012
Presentations
522Teaching Experience
2-
Apr, 2021 - PresentInorganic and Analytical Chemistry (University of Tokyo, Graduate School of Science, Department of Chemistry)
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Apr, 2011 - PresentAdvanced Analytical Chemistry IV (University of Tokyo, Graduate School of Science, Department of Chemistry)
Professional Memberships
5Research Projects
6-
Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research on Innovative Areas (Research in a proposed research area), Japan Society for the Promotion of Science, Jun, 2017 - Mar, 2022
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (B), Japan Society for the Promotion of Science, Apr, 2014 - Mar, 2019
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, 2010 - 2012
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科学研究費助成事業 若手研究(A), 日本学術振興会, 2005 - 2007
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Grants-in-Aid for Scientific Research Grant-in-Aid for Scientific Research (C), Japan Society for the Promotion of Science, 2002 - 2003
● 専任大学名
1-
Affiliation (university)東京大学(University of Tokyo)
● 所属する所内委員会
1-
ISAS Committee放射線安全委員会