Hayabusa2: Scientific importance of samples returned from C-type near-Earth asteroid (162173) 1999 JU3

Tachibana, Shogo; Abe, Masanao; Arakawa, Masahiko; Fujimoto, M.; Iijima, Y.; Ishiguro, Masateru; Kitazato, K.; Kobayashi, Naoki; Namiki, Noriyuki; Okada, Tatsuaki; Okazaki, Ryuji; Sawada, Hirotaka; Sugita, Seiji; Takano, Yoshinori; Tanaka, Satoshi; Watanabe, Sei‐ichiro; Yoshikawa, Makoto; Kuninaka, Hitoshi

doi:10.2343/geochemj.2.0350

Cited by 116 publications

(86 citation statements)

References 79 publications

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“…Therefore, despite the short duration (up to 96 h), the posthydration local heating of Ryugu could have significantly reduced the abundance and altered the primitive nature of the OM, which accordingly impacts the scientific objective of the sample return mission—to obtain pristine asteroidal samples that enable us to investigate the diversification of organic materials through interaction with minerals and water in a planetesimal (Tachibana et al. ; Watanabe et al. ).…”

Section: Discussionmentioning

confidence: 99%

“…The results of our short-term heating experiments conducted on the more hydrous lithology of the Tagish Lake meteorite imply that thermal metamorphism often reduces the overall C content, particularly in the heatsensitive SOM species. Therefore, despite the short duration (up to 96 h), the posthydration local heating of Ryugu could have significantly reduced the abundance and altered the primitive nature of the OM, which accordingly impacts the scientific objective of the sample return mission-to obtain pristine asteroidal samples that enable us to investigate the diversification of organic materials through interaction with minerals and water in a planetesimal (Tachibana et al 2014;Watanabe et al 2017).…”

Section: Implications For Upcoming Missions Visiting C-complex Asteroidsmentioning

confidence: 99%

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Heating experiments of the Tagish Lake meteorite: Investigation of the effects of short‐term heating on chondritic organics

Chan

Nakato

Kebukawa

et al. 2018

Meteorit & Planetary Scien

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We present in this study the effects of short‐term heating on organics in the Tagish Lake meteorite and how the difference in the heating conditions can modify the organic matter (OM) in a way that complicates the interpretation of a parent body's heating extent with common cosmothermometers. The kinetics of short‐term heating and its influence on the organic structure are not well understood, and any study of OM is further complicated by the complex alteration processes of the thermally metamorphosed carbonaceous chondrites—potential analogues of the target asteroid Ryugu of the Hayabusa2 mission—which had experienced posthydration, short‐duration local heating. In an attempt to understand the effects of short‐term heating on chondritic OM, we investigated the change in the OM contents of the experimentally heated Tagish Lake meteorite samples using Raman spectroscopy, scanning transmission X‐ray microscopy utilizing X‐ray absorption near edge structure spectroscopy, and ultraperformance liquid chromatography fluorescence detection and quadrupole time of flight hybrid mass spectrometry. Our experiment suggests that graphitization of OM did not take place despite the samples being heated to 900 °C for 96 h, as the OM maturity trend was influenced by the heating conditions, kinetics, and the nature of the OM precursor, such as the presence of abundant oxygenated moieties. Although both the intensity of the 1s−σ* exciton cannot be used to accurately interpret the peak metamorphic temperature of the experimentally heated Tagish Lake sample, the Raman graphite band widths of the heated products significantly differ from that of chondritic OM modified by long‐term internal heating.

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Section: Discussionmentioning

confidence: 99%

Section: Implications For Upcoming Missions Visiting C-complex Asteroidsmentioning

confidence: 99%

Heating experiments of the Tagish Lake meteorite: Investigation of the effects of short‐term heating on chondritic organics

Chan

Nakato

Kebukawa

et al. 2018

Meteorit & Planetary Scien

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“…The target asteroid is classified as C-type, a volatile-rich carbonaceous type. The technology of Hayabusa2 is based on that of the first Hayabusa mission, but its science experiments are more specified to C-type asteroid and reinforced with the instruments (Tachibana et al 2014). The remote sensing instruments are designed to focus on investigating the degree of hydration of minerals by measuring 3-μm band absorption features and on physical state of the surface, such as the thermo-physical properties of the asteroid based on thermal infrared imaging (Okada and Iwata 2014).…”

mentioning

confidence: 99%

Special issue “Science of solar system materials examined from Hayabusa and future missions (II)”

Okada

Binzel

Connolly

et al. 2017

Earth Planets Space

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“…A careful analytical strategy (i.e., the order of analyses) will be required for the robust description of extraterrestrial organic matter in future sample return missions (e.g., Hayabusa2; Tachibana et al 2014;Okazaki et al 2017;Sawada et al 2017;Watanabe et al 2017;cf. OSIRIS-Rex;Dworkin et al 2017).…”

Section: Future Workmentioning

confidence: 99%

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

Uesugi

Ito

Yabuta

et al. 2019

Meteorit & Planetary Scien

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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 (ESCuC) 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.

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Hayabusa2: Scientific importance of samples returned from C-type near-Earth asteroid (162173) 1999 JU3

Cited by 116 publications

References 79 publications

Heating experiments of the Tagish Lake meteorite: Investigation of the effects of short‐term heating on chondritic organics

Heating experiments of the Tagish Lake meteorite: Investigation of the effects of short‐term heating on chondritic organics

Special issue “Science of solar system materials examined from Hayabusa and future missions (II)”

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

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