[P-CG10] Small Solar System Bodies: General and Mars Satellite Sample Return Mission

[PCG10-20] Origin and evolution of Phobos: Scientific objectives awaiting particle measurements by MMX

*寺田 直樹¹、関 華奈子²、二穴 喜文³、Leblanc Francois⁴、横田 勝一郎⁵、斎藤 義文⁵、松岡 彩子⁵、野村 麗子⁵、山崎 敦⁵、栗原 純一⁶、三浦 弥生⁷、馬上 謙一⁶、岡崎 隆司⁸、中村 智樹¹、亀田 真吾⁹、長 勇一郎⁹、火星衛星探査計画 科学検討チーム (1.東北大学大学院理学研究科、2.東京大学大学院理学系研究科、3.スウェーデン国立スペース物理研究所、4.フランス大気環境宇宙観測研究所、5.宇宙航空開発研究機構・宇宙科学研究所、6.北海道大学大学院理学研究院、7.東京大学地震研究所、8.九州大学大学院理学研究院、9.立教大学理学部)

キーワード：Phobos, Mars, Particle

In this presentation, we will present scientific objectives of particle measurements by the Mars Moon eXploration (MMX) mission. The MINE (Magnetic field, Ion and Neutral Experiment) package consisting of five instruments (MSA, MIA, REN, NIMES, and MGF) and MEC (Mars Escaping atmosphere Capturing device) have been proposed as possible payloads of the MMX mission. MINE and MEC would perform particle measurements corresponding to the following three scientific objectives: (1) To obtain indirect information on the Phobos internal structure in order to constrain the origin of Phobos independent of the sample analysis results. (2) To characterize the space environment and the surface features of Phobos, with the intention of comparison with asteroids. (3) To constrain the total amount of atmosphere lost from Mars to space during its history. Details of these three scientific objectives will be presented.