[P-PS03] Small Solar System Bodies: New perspectives on the origin and evolution of the Solar System

2026年5月27日(水) 10:45 〜 12:15 302 (幕張メッセ国際会議場)

座長:伊藤元雄(海洋研究開発機構　高知コア研究所)、吉田二美(産業医科大学)、岡田達明(宇宙航空研究開発機構宇宙科学研究所)

Asteroids, comets, satellites, and other small solar system bodies
provide crucial clues for understanding the origin and evolution of
the solar system and for supplying the building blocks of life.
Numerous discoveries have been made through ground-based and space
telescope observations and direct exploration by spacecraft.
Meanwhile, in addition to analyzing meteorites and cosmic dust, the
analysis of returned samples via sample return missions has enabled
the acquisition of empirical and highly precise information.
Integrating observational research, sample analysis studies, and
theoretical/laboratory experiments is expected to foster new
perspectives in planetary science. This session will focus on the
latest theoretical and experimental research on solar system small
bodies (meteorite & sample return analyses via high resolution
analytical techniques), the latest results from ground-based
observations, and new insights from current missions such as
OSIRIS-REx and DART. It will also cover high-sensitivity observations
expected in the large telescopes like LSST and JWST, as well as the
Hayabusa2#, MMX, Destiny+, Hera, Comet Interceptor, Lucy, and Psyche,
and the scientific progress achievable through their coordination.
Furthermore, we encourage active discussion on the next-generation
asteroid exploration mission concepts and payload studies currently
under Working Group consideration, as well as on planetary defense.

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10:45 〜 11:00

[PPS03-01] Freezing and evaporation on the parent bodies of Ryugu and Bennu: brine minerals suggest divergent fate of liquid water on icy planetesimals

*Jinfei Yu¹, Hiroyuki Kurokawa¹ (1. The University of Tokyo)

11:00 〜 11:15

[PPS03-02] ベヌーおよびリュウグウ試料中のリン酸塩鉱物微粒子のサイズ頻度分布と表面スペクトル特性への影響

*中原俊平¹ (1. 東京大学)

11:15 〜 11:30

[PPS03-03] リュウグウ表面岩塊上の小クレーターから推定した熱疲労速度を利用した岩塊サイズ分布進化モデル

*愛敬雄太¹、諸田智克¹ (1. 東京大学)

11:30 〜 11:45

[PPS03-04] Small-scale Cr and Ti isotopic heterogeneity in Ryugu samples influenced by parent-body aqueous alteration

*横山哲也¹、Lopez Garcia Karina¹、Gautam Ikshu¹、飯塚毅²、羽場麻希子¹、中西奈央¹、深井稜汰³ (1. 東京科学大学理学院地球惑星科学系、2. 東京大学理学系研究科地球惑星科学専攻、3. 宇宙航空研究開発機構・宇宙科学研究所)

11:45 〜 12:05

[PPS03-05] Recent Activities and Future Directions of the Small Bodies Assessment Group

★Invited Papers

*Ronald Terik Daly¹ (1. Johns Hopkins University Applied Physics Laboratory)

時間調整 (12:05 〜 12:15)