Assessing the debris generated by the small carry-on impactor operated from the  &lt;i&gt;Hayabusa2&lt;/i&gt; mission

Ito, Motoo; Takano, Yoshinori; Kebukawa, Yoko; Ohigashi, Takuji; Matsuoka, Moe; Kiryu, Kento; Uesugi, Masayuki; Nakamura, Tomoki; Yuzawa, Hayato; Yamada, Keita; Naraoka, Hiroshi; Yada, Toru; Abe, Masanao; Hayakawa, Masahiko; Saiki, Takanao; Tachibana, Shogo

doi:10.2343/geochemj.2.0632

Cited by 5 publications

(2 citation statements)

References 36 publications

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“…The Small Carry-on Impactor (SCI) used to generate the regolith plume from which sample C0107 was collected was red from the spacecraft via a polymer bonded cyclotetramethylene-tetranitramine (HMX) explosive (Saiki et al, 2013) while A0106 was collected and sealed before the deployment of the SCI. Debris from the SCI is dominated by lower mass hydrocarbons with naphthalene > > phenanthrene > anthracene (Ito et al, 2021). The lower abundance of PAHs in C0107 than A0106 as well as the lower abundance of naphthalene than phenanthrene and anthracene suggests that this explosive did not signi cantly contribute to hydrocarbon contamination of the sample.…”

Section: Resultsmentioning

confidence: 98%

“…The Hayabusa2 spacecraft was built with a mechanism to keep the combustion gas generated by the explosion separate from the sample collection chambers and was carefully constructed and monitored for potential contamination during integration and test ). Nevertheless, it has been reported for an unexpected contingency case (e.g., outburst) that volatile combustion gases and semi-volatile organics were produced together with quenched carbonaceous products by the system (Takano et al, 2020;Ito et al, 2021). Indeed, all the PAHs found in A0106 and C0107 were also detected in analyses of the carbonaceous materials generated during laboratory simulation of the explosion that occurred prior to sample collection in the Hayabusa2 spacecraft (Takano et al, 2020).…”

Section: Resultsmentioning

confidence: 99%

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Organic-Soluble Compounds in Asteroid Ryugu Samples A0106 and C0107 and the Orgueil (CI1) Meteorite

Aponte

Dworkin

Glavin

et al. 2022

Preprint

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Evaluating the molecular distribution of organic compounds in pristine extraterrestrial materials is cornerstone to understanding the abiotic synthesis of organics and allows us to better understand the molecular diversity available during the formation of our solar system and before the origins of life on Earth. In this work we identify multiple organic compounds in solvent extracts of asteroid Ryugu samples A0106 and C0107 and the Orgueil meteorite using two-dimensional gas chromatography and time-of-flight high resolution mass spectrometry (GC×GC-HRMS). Our analyses found similarities between the molecular distribution of organic compounds in Ryugu and the CI carbonaceous chondrite Orgueil. Specifically, several PAHs and organosulfides were found in Ryugu and Orgueil suggesting an interstellar and parent body origin for these compounds. We also evaluated the common relationship between Ryugu, Orgueil, and comets like Wild-2; however, until comprehensive compound-specific isotopic analyses for these organic species are undertaken, and until the effects of parent body processes and Earth’s weathering processes on meteoritic organics are better understood, their parent-daughter relationships will remain unanswered. Finally, the study of organic compounds in Ryugu samples and the curation practices for the future preservation of these unvaluable materials are also of special interest for future sample return missions, including NASA’s OSIRIS-REx asteroid sample return mission.

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Section: Resultsmentioning

confidence: 98%

Section: Resultsmentioning

confidence: 99%

Organic-Soluble Compounds in Asteroid Ryugu Samples A0106 and C0107 and the Orgueil (CI1) Meteorite

Aponte

Dworkin

Glavin

et al. 2022

Preprint

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Infrared absorption spectra from organic matter in the asteroid Ryugu samples: Some unique properties compared to unheated carbonaceous chondrites

Kebukawa,

Quirico,

Dartois

et al. 2023

Meteorit & Planetary Scien

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The infrared spectral characteristics of organic‐rich acid residues prepared from Ryugu samples returned by the JAXA Hayabusa2 mission generally match those from unheated carbonaceous chondrite meteorites, but the residues from Ryugu are richer in methyl and methylene functional groups and have higher CH2/CH3 ratios. Moreover, two distinct outlier carbonaceous phases are found; one with spectral characteristics of N‐H functional groups, likely amides, and a second phase containing less nitrogen. Such infrared characteristics of Ryugu organic matter might indicate the pristine nature of the freshly collected samples and reflect the near‐surface chemistry in the parent asteroid.

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Environmental assessment in the prelaunch phase of Hayabusa2 for safety declaration of returned samples from the asteroid (162173) Ryugu: background monitoring and risk management during development of the sampler system

Sakamoto

Takano²,

Sawada³

et al. 2022

Earth Planets Space

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We report ground-based environmental assessments performed during development of the sampler system until the launch of the Hayabusa2 spacecraft. We conducted static monitoring of potential contaminants to assess the environmental cleanliness during (1) laboratory work performed throughout the development and manufacturing processes of the sampler devices, (2) installation of the sampler system on the spacecraft, and (3) transportation to the launch site at the Japan Aerospace Exploration Agency’s (JAXA’s) Tanegashima Space Center. Major elements and ions detected in our inorganic analyses were sodium (Na), potassium (K), and ionized chloride (Cl–); those elements and ions were positively correlated with the total organic content and with exposure duration in the range from 101 to 103 nanograms per monitor coupon within an ~ 30-mm diameter scale. We confirmed that total deposits on the coupon were below the microgram-scale order during manufacturing, installation, and transportation in the prelaunch phase. The present assessment yields a nominal safety declaration for analysis of the pristine sample (> 5.4 g) returned from asteroid (162173) Ryugu combined with a highly clean environmental background level. We expect that the sample returned from Ryugu by Hayabusa2 will be free of severe and/or unknown contamination and will allow us to provide native profiles recorded for the carbonaceous asteroid history. Graphical Abstract

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Assessing the debris generated by the small carry-on impactor operated from the <i>Hayabusa2</i> mission

Cited by 5 publications

References 36 publications

Organic-Soluble Compounds in Asteroid Ryugu Samples A0106 and C0107 and the Orgueil (CI1) Meteorite

Organic-Soluble Compounds in Asteroid Ryugu Samples A0106 and C0107 and the Orgueil (CI1) Meteorite

Infrared absorption spectra from organic matter in the asteroid Ryugu samples: Some unique properties compared to unheated carbonaceous chondrites

Environmental assessment in the prelaunch phase of Hayabusa2 for safety declaration of returned samples from the asteroid (162173) Ryugu: background monitoring and risk management during development of the sampler system

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