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Further characterization of carbonaceous materials in Hayabusa‐returned samples to understand their origin

2019; Wiley; Volume: 54; Issue: 3 Linguagem: Inglês

10.1111/maps.13236

1945-5100

Masayuki Uesugi, Motoo Ito, Hikaru Yabuta, Hiroshi Naraoka, F. Kitajima, Yoshinori Takano, Hajime Mita, Yoko Kebukawa, Aiko Nakato, Yuzuru Karouji,

Scientific Research and Discoveries

Abstract Carbonaceous materials in the sample catcher of the Hayabusa spacecraft were assigned as category 3 particles. We investigated the category 3 particles with a suite of in situ microanalytical methods. Possible contaminants collected from the cleanrooms of the spacecraft assembly and extraterrestrial sample curation center ( ESC uC) were also analyzed in the same manner as category 3 particles for comparison. Our data were integrated with those of the preliminary examination team for category 3 particles. Possible origins for the category 3 particles include contamination before and after the operation of the Hayabusa spacecraft.