Japan Geoscience Union Meeting 2018

Presentation information

[EE] Oral

P (Space and Planetary Sciences) » P-CG Complex & General

[P-CG21] Future missions and instrumentation for space and planetary science

Mon. May 21, 2018 3:30 PM - 5:00 PM A01 (Tokyo Bay Makuhari Hall)

convener:Shingo Kameda(School of Science, Rikkyo University), Satoshi Kasahara(The university of Tokyo), Mitsunori Ozaki(金沢大学理工研究域電子情報学系, 共同), Kazuo Yoshioka(Graduate School of frontier Science, The University of Tokyo), Chairperson:Yoshioka Kazuo(The University of Tokyo)

4:05 PM - 4:20 PM

[PCG21-14] Analysis of Isotopic and Molecular Compositions of Materials from a Jupiter Trojan Asteroid Using High Resolution Mass Spectrometry (HRMS) in the Solar Power Sail OKEANOS Mission

*Yoko Kebukawa1, Tatsuaki Okada2,3, Jun Aoki4, Motoo Ito5, Yosuke Kawai4, Shoichiro Yokota4, Jun Matsumoto2, Hisayoshi Yurimoto6,2, Hajime Yano2, Hervé Cottin7, Noel Grand7, Osamu Mori2, The OKEANOS team (1.Yokohama National University, 2.Japan Aerospace Exploration Agency, 3.The University of Tokyo, 4.Osaka University, 5.JAMSTEC, 6.Hokkaido University, 7.LISA, Université Paris-Est Créteil)

Keywords:Jupiter Trojan asteroids, Mass spectrometry, OKEANOS

The OKEANOS (Outsized Kite-craft for Exploration and AstroNautics in the Outer Solar system) is a candidate for the upcoming strategic middle-class space exploration to rendezvous with and land on a Jupiter Trojan asteroid using a Solar Power Sail (SPS). The mission concept includes in-situ sampling analysis of the surface and subsurface (up to 1 m) materials of a Jupiter Trojan asteroid using a multi-turn time-of-flight type high-resolution mass spectrometry (HRMS) system.

We plan to analyze isotopic and elemental compositions of volatile materials from organic matter, hydrated minerals, and ice, in order to understand origin and evolution of the Jupiter Trojan asteroids. It will provide insights into (1) planet formation/migration theories, (2) evolution and distribution of volatiles and organic matter in the Solar System, and (3) evolutional history of the Solar System small bodies beyond the snow line.
The HRMS system is under development aiming to measure H, N, C, O isotopic compositions and elemental compositions of organic compounds. The system also includes various pre-MS procedures; stepwise heating up to 600ºC, gas chromatography (GC), and high-temperature pyrolysis with catalyst to decompose the samples into simple gaseous molecules (e.g., H2, CO, and N2) for isotopic ratio analysis.