JpGU-AGU Joint Meeting 2020

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[E] Oral

P (Space and Planetary Sciences ) » P-PS Planetary Sciences

[P-PS04] Regolith Science

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), Kevin John Walsh(Southwest Research Institute Boulder)

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.

[PPS04-07] Investigation into the characteristics of granular materials in low gravitational environment (Introduction of Hourglass mission)

★Invited Papers

*Masatsugu Otsuki1, Shingo Ozaki2, Genya Ishigami3, Takao Maeda4, Masataku Sutoh1, Taizo Kobayashi5, Hideaki Miyamoto6, Koji Wada7, Chihiro Kurosawa1, Yuta Kawai1, Haruo Kasahara1, Tetsuya Sakashita1, Shinobu Doi1, Hideaki Uchikawa1, Terumitsu Mano1 (1.Japan Aerospace Exploration Agency, 2.Yokohama National University, 3.Keio University, 4.Chuo University, 5.Ritsumeikan University, 6.The University of Tokyo, 7.Chiba Institute of Technology)

[PPS04-08] Surface Flow Analysis Based on Spectral Distributions around Larger Boulders on Ryugu

*Naofumi Takaki1, ERI TATSUMI1,2, Tomokatsu Morota1, Yuichiro Cho1, Kazuo Yoshioka1, Hirotaka Sawada3, yokota yasuhiro3,4, Naoya Sakatani3, Masahiko Hayakawa3, Rie Honda4, Shingo Kameda5, Moe Matsuoka3, Manabu Yamada6, Chikatoshi Honda7, Toru Kouyama8, Hidehiko Suzuki9, Kazunori Ogawa3,10, Hideaki Miyamoto1, Naru Hirata7, Naoyuki Hirata10, Seiji Sugita1 (1.The University of Tokyo, 2.Instituto de Astrofísica de Canarias, 3.Japan Aerospace Exploration Agency, 4.Kochi University, 5.Rikkyo University, 6.Planetary Exploration Research Center Chiba Institute of Technology, 7.The University of Aizu, 8.National Institute of Advanced Industrial Science and Technology, 9.Meiji University, 10.Kobe University)

[PPS04-09] Global Geology of Bennu from NASA's OSIRIS-REx Space Mission

*Kevin John Walsh1, Erica R Jawin2, Timothy McCoy2, Harold Connolly3, Dante S Lauretta4, Ronald-Louis Ballouz4, Olivier S Barnouin5, Chloe Beddingfield6, Carina Bennet4, Edward Bierhaus7, Keara Burke4, Benton Clark8, Michael Daly9, Marco Delbo10, Daniella DellaGiustina4, Jason Dworkin11, Christine Hartzell12, John Marshall6, Patrick Michel10, Jamie Molaro13, Michael Nolan4, Maurizio Pajola14, Michael Perry5, Bashar Rizk4, Scott Sandford15, Daniel Scheeres16, Steven Schwartz4, David Trang17 (1.Southwest Research Institute Boulder, 2.Smithsonian National Institute, 3.Dept. of Geology, Rowan University, 4.Lunar and Planetary Laboratory, University of Arizona, 5.Johns Hopkins University Applied Physics Laboratory, 6.SETI Institute, 7.Lockheed Martin Space, 8.Space Science Institute, 9.York University, 10.Laboratoire Lagrange, Université Côte d’Azur, 11.NASA Goddard Space Flight Center, 12.Department of Aerospace Engineering, University of Maryland, 13.Planetary Science Institute, 14.INAF - Astronomical Observatory of Padova, 15.NASA Ames Research Center, 16.Smead Dept. of Aerospace Engineering Sciences, University of Colorado, 17.HIGP/University of Hawaii at Manoa)

[PPS04-10] Equatorial features on asteroid (101955) Bennu support mass loss by fission

*Alan R Hildebrand1, Lincoln TJ Hanton1, Fabio Ciceri1, Olivier S Barnouin2, Michael G Daly3, Jeff A Seabrook3, Benjamin Rozitis4, Joshua P Emery5, Daniella N DellaGiustina6, Bashar Rizk6, Michael C Nolan6, Dante S Lauretta6, Catherine Johnson10, Daniel J Scheeres7, Edward B Bierhaus8, Paul Sanchez9 (1.Department of Geoscience, University of Calgary, Calgary, AB, Canada, 2.The Johns Hopkins University Applied Physics Laboratory, Laurel, MD, USA, 3.The Centre for Research in Earth and Space Science, York University, Toronto, ON, Canada, 4.The Open University, Milton Keynes, UK, 5.Northern Arizona University, Flagstaff, AZ, USA, 6.Lunar and Planetary Laboratory, University of Arizona, Tucson, AZ, USA, 7.Smead Department of Aerospace Engineering, University of Colorado, Boulder, CO, USA, 8.Lockheed Martin Space, Littleton, CO, USA, 9.Colorado Center for Astrodynamics Research, University of Colorado, Boulder, CO, USA, 10.Department of Earth, Ocean and Atmospheric Sciences, University of British Columbia, Vancouver, BC, Canada)