Surface environment of Phobos and Phobos simulant UTPS

Hideaki Miyamoto, Takafumi Niihara, Koji Wada, Kazunori Ogawa, Hiroki Senshu, Patrick Michel, Hiroshi Kikuchi, Ryodo Hemmi, Tomoki Nakamura, Akiko M. Nakamura, Naoyuki Hirata, Sho Sasaki, Erik Asphaug, Daniel T. Britt, Paul A. Abell, Ronald Louis Ballouz, Olivier S. Banouin, Nicola Baresi, Maria A. Barucci, Jens BieleMatthias Grott, Hideitsu Hino, Peng K. Hong, Takane Imada, Shingo Kameda, Makito Kobayashi, Guy Libourel, Katsuro Mogi, Naomi Murdoch, Yuki Nishio, Shogo Okamoto, Yuichiro Ota, Masatsugu Otsuki, Katharina A. Otto, Naoya Sakatani, Yuta Shimizu, Tomohiro Takemura, Naoki Terada, Masafumi Tsukamoto, Tomohiro Usui, Konrad Willner

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

The Martian Moons eXploration (MMX) mission will study the Martian moons Phobos and Deimos, Mars, and their environments. The mission scenario includes both landing on the surface of Phobos to collect samples and deploying a small rover for in situ observations. Engineering safeties and scientific planning for these operations require appropriate evaluations of the surface environment of Phobos. Thus, the mission team organized the Landing Operation Working Team (LOWT) and Surface Science and Geology Sub-Science Team (SSG-SST), whose view of the Phobos environment is summarized in this paper. While orbital and large-scale characteristics of Phobos are relatively well known, characteristics of the surface regolith, including the particle size-distributions, the packing density, and the mechanical properties, are difficult to constrain. Therefore, we developed several types of simulated soil materials (simulant), such as UTPS-TB (University of Tokyo Phobos Simulant, Tagish Lake based), UTPS-IB (Impact-hypothesis based), and UTPS-S (Simpler version) for engineering and scientific evaluation experiments. [Figure not available: see fulltext.].

Original languageEnglish (US)
Article number214
JournalEarth, Planets and Space
Volume73
Issue number1
DOIs
StatePublished - Dec 2021
Externally publishedYes

Keywords

  • Deimos
  • MMX
  • Phobos
  • Simulant
  • Surface environment

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

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