[P-PS03] Regolith Science

Sat. Jun 5, 2021 3:30 PM - 5:00 PM Ch.04 (Zoom Room 04)

convener:Koji Wada(Planetary Exploration Research Center, Chiba Institute of Technology), Akiko Nakamura(Graduate School of Science, Kobe University), Patrick Michel(Universite Cote D Azur Observatoire De La Cote D Azur CNRS Laboratoire Lagrange), John Kevin Walsh(Southwest Research Institute Boulder), Chairperson:Yuri Shimaki(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency)

Recent planetary explorations have revealed that almost all solid bodies in the solar system are covered with small particles, called regolith. The surface geology, especially regolith behavior on the surfaces of solid bodies, becomes increasingly more important as represented by Hayabusa mission and other on-going and planned sample-return missions such as Hayabusa2, OSIRIS-REx, and MMX.
For fully understanding the regolith science, it is required to know and compare the regolith conditions on various celestial bodies, from asteroids to planets, with various methods.
Therefore, this session welcomes broad topics related to regolith on various celestial bodies, such as asteroids, comets, the Moon, the martian moons, Mars, etc. Papers on the formation, evolution, and alteration processes of regolith particles and regolith systems on the surface of planetary bodies, remote and in-situ observational results and techniques, analyses and results of returned samples, and laboratory, numerical, and theoretical studies on the fundamental physical and chemical processes are all welcome.
Note that what we call regolith is not just fine grains: all kinds of materials (more or less loose) that lie on the surface, from cobbles to finer grains, are our targets.

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3:30 PM - 3:45 PM

[PPS03-07] Deciphering the regolith properties of small bodies from numerical modeling

★Invited Papers

*Yun Zhang¹ (1.UCA, OCA, CNRS, Lagrange, Nice, France)

3:45 PM - 4:00 PM

[PPS03-08] Charge Magnitude of Electrostatically Lofted Dust Grains over the Lunar Terminator

*Necmi Cihan Orger¹, Kazuhiro Toyoda¹, Mengu Cho¹ (1.Laboratory of Lean Satellite Enterprises and In-Orbit Experiments - Kyushu Institute of Technology)

4:00 PM - 4:15 PM

[PPS03-09] High-velocity impact experiments in reduced gravity: The effect of cohesive strength of particle layers

*Masato Kiuchi¹, Takaya Okamoto¹, Yuuya Nagaashi², Sunao Hasegawa¹, Akiko Nakamura² (1.Japan aerospace exploration agency, Institute of space and astronautical science, 2.Graduate School of Science, Kobe UniversityKobe University)

4:15 PM - 4:30 PM

[PPS03-10] Local variation in thermal inertia around the artificial impact crater on Ryugu

*Naoya Sakatani¹, Satoshi Tanaka², Tatsuaki Okada², Toru Kouyama³, Akira Miura², Naru Hirata⁴, Hiroki Senshu⁵, Takehiko Arai⁶, Yuri Shimaki², Hirohide Demura⁴, Tomohiko Sekiguchi⁷, Jun Takita⁸, Tetsuya Fukuhara¹, Thomas Müller⁹, Axel Hagermann¹⁰, Jens Biele¹¹, Matthias Grott¹¹, Maximillian Hamm^11,12, Marco Delbo¹³, Masahiko Arakawa¹⁴, Kazunori Ogawa¹⁵, Koji Wada⁵, Toshihiko Kadono¹⁶, Rie Honda¹⁷, Kei Shirai¹⁴, Takanao Saiki², Hiroshi Imamura², Yasuhiko Takagi¹⁸, Hajime Yano², Masahiko Hayakawa², Hirotaka Sawada², Satoru Nakazawa², Seiji Sugita¹⁹, Tomokatsu Morota¹⁹, Manabu Yamada⁵, Shingo Kameda¹, ERI TATSUMI²⁰, Yasuhiro Yokota², Hidehiko Suzuki²¹, Kazuo Yoshioka¹⁹, Moe Matsuoka², Yuichiro Cho² (1.Rikkyo University, 2.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3.National Institute of Advanced Industrial Science and Technology, 4.University of Aizu, 5.Chiba Institute of Technology, 6.Ashikaga University, 7.Hokkaido University of Education, 8.Hokkaido Kitami Hokuto High School, 9.Max-Planck Institute for Extraterrestrial Physics, 10.Luleå University of Technology, 11.German Aerospace Center, 12.University of Potsdam, 13.Observatoire de la Côte d'Azur, CNRS, 14.Kobe University, 15.JAXA Space Exploration Center, Japan Aerospace Exploration Agency, 16.University of Occupational and Environmental Health, 17.Kochi University, 18.Aichi Toho University, 19.University of Tokyo, 20.Instituto de Astrofisica de Canarias, 21.Meiji University)

4:30 PM - 4:45 PM

[PPS03-11] Brightness change of Hayabusa2 SCI crater ejecta observed by ONC-T and its implication to the surface status of asteroid Ryugu

*Rie Honda¹, Yasuhiro Yokota², Masahiko Arakawa³, Seiji Sugita⁴, Yuri Shimaki², Koji Wada⁵, Toshihiko Kadono⁶, Kei Shirai³, Kazunori Ogawa⁷, Naoya Sakatani⁸, Ko Ishibashi⁵, Takanao Saiki², Hiroshi Imamura², Satoru Nakazawa², Masahiko Hayakawa², Hajime Yano², Yasuhiko Takagi⁹, Naru Hirata¹⁰, Hirotaka Sawada², Tomokatsu Morota⁴, Shingo Kameda⁸, Eri Tatsumi¹¹, Manabu Yamada⁵, Toru Kouyama¹², Yuichiro Cho⁴, Moe Matsuoka², Kazuo Yoshioka⁴, Hidehiko Suzuki¹³, Chikatoshi Honda¹⁰ (1.Department of Science and Technology, System of Natual Science, Kochi University, 2.Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3.Kobe University, 4.The University of Tokyo, 5.Planetary Exploration Research Center, Chiba Institute of Technology, 6.University of Occupational and Environmental Health, 7.JAXA Space Exploration Center, Japan Aerospace Exploration Agency, 8.Rikkyo University, 9.Aichi Toho University, 10.The University of Aizu, 11.Instituto de Astrofisica de Canarias, University of La Laguna, 12.National Institute of Advanced Industrial Science and Technology, 13.Meiji University)

4:45 PM - 5:00 PM

[PPS03-12] Study of Hydrated Asteroids via Polarimetry: Correlation between Polarimetric Properties and Degree of Aqueous Alteration of Hydrated asteroids.

*Jooyeon Geem¹, Masateru Ishiguro¹, Hiroyuki Naito², Daisuke Kuroda⁶, Koki Takahashi³, Tomohiko Sekiguchi³, Seiko Takagi⁴, Tatsuharu Ono⁴, Kiyoshi Kuramoto⁴, Tomoki Nakamura⁵ (1.Astronomy program, Dept of Physics and Astronomy, Seoul National University, 2.Nayoro Observatory, 3.Hokkaido University of Education, 4.Department of Cosmosciences, Graduate School of Science, Hokkaido University, 5.Department of Earth and Planetary Material Sciences, Faculty of Science, Tohoku University, 6.Okayama Observatory, Kyoto University)

Session information