Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth

S. Tachibana; H. Sawada; R. Okazaki; Y. Takano; K. Sakamoto; Y. N. Miura; C. Okamoto; H. Yano; S. Yamanouchi; P. Michel; Y. Zhang; S. Schwartz; F. Thuillet; H. Yurimoto; T. Nakamura; T. Noguchi; H. Yabuta; H. Naraoka; A. Tsuchiyama; N. Imae; K. Kurosawa; A. M. Nakamura; K. Ogawa; S. Sugita; T. Morota; R. Honda; S. Kameda; E. Tatsumi; Y. Cho; K. Yoshioka; Y. Yokota; M. Hayakawa; M. Matsuoka; N. Sakatani; M. Yamada; T. Kouyama; H. Suzuki; C. Honda; T. Yoshimitsu; T. Kubota; H. Demura; T. Yada; M. Nishimura; K. Yogata; A. Nakato; M. Yoshitake; A. I. Suzuki; S. Furuya; K. Hatakeda; A. Miyazaki; K. Kumagai; T. Okada; M. Abe; T. Usui; T. R. Ireland; M. Fujimoto; T. Yamada; M. Arakawa; H. C. Connolly; A. Fujii; S. Hasegawa; N. Hirata; N. Hirata; C. Hirose; S. Hosoda; Y. Iijima; H. Ikeda; M. Ishiguro; Y. Ishihara; T. Iwata; S. Kikuchi; K. Kitazato; D. S. Lauretta; G. Libourel; B. Marty; K. Matsumoto; T. Michikami; Y. Mimasu; A. Miura; O. Mori; K. Nakamura-Messenger; N. Namiki; A. N. Nguyen; L. R. Nittler; H. Noda; R. Noguchi; N. Ogawa; G. Ono; M. Ozaki; H. Senshu; T. Shimada; Y. Shimaki; K. Shirai; S. Soldini; T. Takahashi; Y. Takei; H. Takeuchi; R. Tsukizaki; K. Wada; Y. Yamamoto; K. Yoshikawa; K. Yumoto; M. E. Zolensky; S. Nakazawa; F. Terui; S. Tanaka; T. Saiki; M. Yoshikawa; S. Watanabe; Y. Tsuda

doi:10.1126/science.abj8624

Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth

S. Tachibana, H. Sawada, R. Okazaki, Y. Takano, K. Sakamoto, Y. N. Miura, C. Okamoto, H. Yano, S. Yamanouchi, P. Michel, Y. Zhang, S. Schwartz, F. Thuillet, H. Yurimoto, T. Nakamura, T. Noguchi, H. Yabuta, H. Naraoka, A. Tsuchiyama, N. ImaeK. Kurosawa, A. M. Nakamura, K. Ogawa, S. Sugita, T. Morota, R. Honda, S. Kameda, E. Tatsumi, Y. Cho, K. Yoshioka, Y. Yokota, M. Hayakawa, M. Matsuoka, N. Sakatani, M. Yamada, T. Kouyama, H. Suzuki, C. Honda, T. Yoshimitsu, T. Kubota, H. Demura, T. Yada, M. Nishimura, K. Yogata, A. Nakato, M. Yoshitake, A. I. Suzuki, S. Furuya, K. Hatakeda, A. Miyazaki, K. Kumagai, T. Okada, M. Abe, T. Usui, T. R. Ireland, M. Fujimoto, T. Yamada, M. Arakawa, H. C. Connolly, A. Fujii, S. Hasegawa, N. Hirata, N. Hirata, C. Hirose, S. Hosoda, Y. Iijima, H. Ikeda, M. Ishiguro, Y. Ishihara, T. Iwata, S. Kikuchi, K. Kitazato, D. S. Lauretta, G. Libourel, B. Marty, K. Matsumoto, T. Michikami, Y. Mimasu, A. Miura, O. Mori, K. Nakamura-Messenger, N. Namiki, A. N. Nguyen, L. R. Nittler, H. Noda, R. Noguchi, N. Ogawa, G. Ono, M. Ozaki, H. Senshu, T. Shimada, Y. Shimaki, K. Shirai, S. Soldini, T. Takahashi, Y. Takei, H. Takeuchi, R. Tsukizaki, K. Wada, Y. Yamamoto, K. Yoshikawa, K. Yumoto, M. E. Zolensky, S. Nakazawa, F. Terui, S. Tanaka, T. Saiki, M. Yoshikawa, S. Watanabe, Y. Tsuda

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Abstract

The Hayabusa2 spacecraft investigated the C-type (carbonaceous) asteroid (162173) Ryugu. The mission performed two landing operations to collect samples of surface and subsurface material, the latter exposed by an artificial impact. We present images of the second touchdown site, finding that ejecta from the impact crater was present at the sample location. Surface pebbles at both landing sites show morphological variations ranging from rugged to smooth, similar to Ryugu’s boulders, and shapes from quasi-spherical to flattened. The samples were returned to Earth on 6 December 2020. We describe the morphology of >5 grams of returned pebbles and sand. Their diverse color, shape, and structure are consistent with the observed materials of Ryugu; we conclude that they are a representative sample of the asteroid.

Original language	English (US)
Pages (from-to)	1011-1016
Number of pages	6
Journal	Science
Volume	375
Issue number	6584
DOIs	https://doi.org/10.1126/science.abj8624
State	Published - Mar 4 2022

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Tachibana, S., Sawada, H., Okazaki, R., Takano, Y., Sakamoto, K., Miura, Y. N., Okamoto, C., Yano, H., Yamanouchi, S., Michel, P., Zhang, Y., Schwartz, S., Thuillet, F., Yurimoto, H., Nakamura, T., Noguchi, T., Yabuta, H., Naraoka, H., Tsuchiyama, A., ... Tsuda, Y. (2022). Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth. Science, 375(6584), 1011-1016. https://doi.org/10.1126/science.abj8624

Tachibana, S, Sawada, H, Okazaki, R, Takano, Y, Sakamoto, K, Miura, YN, Okamoto, C, Yano, H, Yamanouchi, S, Michel, P, Zhang, Y, Schwartz, S, Thuillet, F, Yurimoto, H, Nakamura, T, Noguchi, T, Yabuta, H, Naraoka, H, Tsuchiyama, A, Imae, N, Kurosawa, K, Nakamura, AM, Ogawa, K, Sugita, S, Morota, T, Honda, R, Kameda, S, Tatsumi, E, Cho, Y, Yoshioka, K, Yokota, Y, Hayakawa, M, Matsuoka, M, Sakatani, N, Yamada, M, Kouyama, T, Suzuki, H, Honda, C, Yoshimitsu, T, Kubota, T, Demura, H, Yada, T, Nishimura, M, Yogata, K, Nakato, A, Yoshitake, M, Suzuki, AI, Furuya, S, Hatakeda, K, Miyazaki, A, Kumagai, K, Okada, T, Abe, M, Usui, T, Ireland, TR, Fujimoto, M, Yamada, T, Arakawa, M, Connolly, HC, Fujii, A, Hasegawa, S, Hirata, N, Hirata, N, Hirose, C, Hosoda, S, Iijima, Y, Ikeda, H, Ishiguro, M, Ishihara, Y, Iwata, T, Kikuchi, S, Kitazato, K, Lauretta, DS, Libourel, G, Marty, B, Matsumoto, K, Michikami, T, Mimasu, Y, Miura, A, Mori, O, Nakamura-Messenger, K, Namiki, N, Nguyen, AN, Nittler, LR, Noda, H, Noguchi, R, Ogawa, N, Ono, G, Ozaki, M, Senshu, H, Shimada, T, Shimaki, Y, Shirai, K, Soldini, S, Takahashi, T, Takei, Y, Takeuchi, H, Tsukizaki, R, Wada, K, Yamamoto, Y, Yoshikawa, K, Yumoto, K, Zolensky, ME, Nakazawa, S, Terui, F, Tanaka, S, Saiki, T, Yoshikawa, M, Watanabe, S & Tsuda, Y 2022, 'Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth', Science, vol. 375, no. 6584, pp. 1011-1016. https://doi.org/10.1126/science.abj8624

@article{7d1fed6122e64ffb90e6457995f5e5c0,

title = "Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth",

abstract = "The Hayabusa2 spacecraft investigated the C-type (carbonaceous) asteroid (162173) Ryugu. The mission performed two landing operations to collect samples of surface and subsurface material, the latter exposed by an artificial impact. We present images of the second touchdown site, finding that ejecta from the impact crater was present at the sample location. Surface pebbles at both landing sites show morphological variations ranging from rugged to smooth, similar to Ryugu{\textquoteright}s boulders, and shapes from quasi-spherical to flattened. The samples were returned to Earth on 6 December 2020. We describe the morphology of >5 grams of returned pebbles and sand. Their diverse color, shape, and structure are consistent with the observed materials of Ryugu; we conclude that they are a representative sample of the asteroid.",

author = "S. Tachibana and H. Sawada and R. Okazaki and Y. Takano and K. Sakamoto and Miura, {Y. N.} and C. Okamoto and H. Yano and S. Yamanouchi and P. Michel and Y. Zhang and S. Schwartz and F. Thuillet and H. Yurimoto and T. Nakamura and T. Noguchi and H. Yabuta and H. Naraoka and A. Tsuchiyama and N. Imae and K. Kurosawa and Nakamura, {A. M.} and K. Ogawa and S. Sugita and T. Morota and R. Honda and S. Kameda and E. Tatsumi and Y. Cho and K. Yoshioka and Y. Yokota and M. Hayakawa and M. Matsuoka and N. Sakatani and M. Yamada and T. Kouyama and H. Suzuki and C. Honda and T. Yoshimitsu and T. Kubota and H. Demura and T. Yada and M. Nishimura and K. Yogata and A. Nakato and M. Yoshitake and Suzuki, {A. I.} and S. Furuya and K. Hatakeda and A. Miyazaki and K. Kumagai and T. Okada and M. Abe and T. Usui and Ireland, {T. R.} and M. Fujimoto and T. Yamada and M. Arakawa and Connolly, {H. C.} and A. Fujii and S. Hasegawa and N. Hirata and N. Hirata and C. Hirose and S. Hosoda and Y. Iijima and H. Ikeda and M. Ishiguro and Y. Ishihara and T. Iwata and S. Kikuchi and K. Kitazato and Lauretta, {D. S.} and G. Libourel and B. Marty and K. Matsumoto and T. Michikami and Y. Mimasu and A. Miura and O. Mori and K. Nakamura-Messenger and N. Namiki and Nguyen, {A. N.} and Nittler, {L. R.} and H. Noda and R. Noguchi and N. Ogawa and G. Ono and M. Ozaki and H. Senshu and T. Shimada and Y. Shimaki and K. Shirai and S. Soldini and T. Takahashi and Y. Takei and H. Takeuchi and R. Tsukizaki and K. Wada and Y. Yamamoto and K. Yoshikawa and K. Yumoto and Zolensky, {M. E.} and S. Nakazawa and F. Terui and S. Tanaka and T. Saiki and M. Yoshikawa and S. Watanabe and Y. Tsuda",

year = "2022",

month = mar,

day = "4",

doi = "10.1126/science.abj8624",

language = "English (US)",

volume = "375",

pages = "1011--1016",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

number = "6584",

}

TY - JOUR

T1 - Pebbles and sand on asteroid (162173) Ryugu

T2 - In situ observation and particles returned to Earth

AU - Tachibana, S.

AU - Sawada, H.

AU - Okazaki, R.

AU - Takano, Y.

AU - Sakamoto, K.

AU - Miura, Y. N.

AU - Okamoto, C.

AU - Yano, H.

AU - Yamanouchi, S.

AU - Michel, P.

AU - Zhang, Y.

AU - Schwartz, S.

AU - Thuillet, F.

AU - Yurimoto, H.

AU - Nakamura, T.

AU - Noguchi, T.

AU - Yabuta, H.

AU - Naraoka, H.

AU - Tsuchiyama, A.

AU - Imae, N.

AU - Kurosawa, K.

AU - Nakamura, A. M.

AU - Ogawa, K.

AU - Sugita, S.

AU - Morota, T.

AU - Honda, R.

AU - Kameda, S.

AU - Tatsumi, E.

AU - Cho, Y.

AU - Yoshioka, K.

AU - Yokota, Y.

AU - Hayakawa, M.

AU - Matsuoka, M.

AU - Sakatani, N.

AU - Yamada, M.

AU - Kouyama, T.

AU - Suzuki, H.

AU - Honda, C.

AU - Yoshimitsu, T.

AU - Kubota, T.

AU - Demura, H.

AU - Yada, T.

AU - Nishimura, M.

AU - Yogata, K.

AU - Nakato, A.

AU - Yoshitake, M.

AU - Suzuki, A. I.

AU - Furuya, S.

AU - Hatakeda, K.

AU - Miyazaki, A.

AU - Kumagai, K.

AU - Okada, T.

AU - Abe, M.

AU - Usui, T.

AU - Ireland, T. R.

AU - Fujimoto, M.

AU - Yamada, T.

AU - Arakawa, M.

AU - Connolly, H. C.

AU - Fujii, A.

AU - Hasegawa, S.

AU - Hirata, N.

AU - Hirose, C.

AU - Hosoda, S.

AU - Iijima, Y.

AU - Ikeda, H.

AU - Ishiguro, M.

AU - Ishihara, Y.

AU - Iwata, T.

AU - Kikuchi, S.

AU - Kitazato, K.

AU - Lauretta, D. S.

AU - Libourel, G.

AU - Marty, B.

AU - Matsumoto, K.

AU - Michikami, T.

AU - Mimasu, Y.

AU - Miura, A.

AU - Mori, O.

AU - Nakamura-Messenger, K.

AU - Namiki, N.

AU - Nguyen, A. N.

AU - Nittler, L. R.

AU - Noda, H.

AU - Noguchi, R.

AU - Ogawa, N.

AU - Ono, G.

AU - Ozaki, M.

AU - Senshu, H.

AU - Shimada, T.

AU - Shimaki, Y.

AU - Shirai, K.

AU - Soldini, S.

AU - Takahashi, T.

AU - Takei, Y.

AU - Takeuchi, H.

AU - Tsukizaki, R.

AU - Wada, K.

AU - Yamamoto, Y.

AU - Yoshikawa, K.

AU - Yumoto, K.

AU - Zolensky, M. E.

AU - Nakazawa, S.

AU - Terui, F.

AU - Tanaka, S.

AU - Saiki, T.

AU - Yoshikawa, M.

AU - Watanabe, S.

AU - Tsuda, Y.

PY - 2022/3/4

Y1 - 2022/3/4

N2 - The Hayabusa2 spacecraft investigated the C-type (carbonaceous) asteroid (162173) Ryugu. The mission performed two landing operations to collect samples of surface and subsurface material, the latter exposed by an artificial impact. We present images of the second touchdown site, finding that ejecta from the impact crater was present at the sample location. Surface pebbles at both landing sites show morphological variations ranging from rugged to smooth, similar to Ryugu’s boulders, and shapes from quasi-spherical to flattened. The samples were returned to Earth on 6 December 2020. We describe the morphology of >5 grams of returned pebbles and sand. Their diverse color, shape, and structure are consistent with the observed materials of Ryugu; we conclude that they are a representative sample of the asteroid.

AB - The Hayabusa2 spacecraft investigated the C-type (carbonaceous) asteroid (162173) Ryugu. The mission performed two landing operations to collect samples of surface and subsurface material, the latter exposed by an artificial impact. We present images of the second touchdown site, finding that ejecta from the impact crater was present at the sample location. Surface pebbles at both landing sites show morphological variations ranging from rugged to smooth, similar to Ryugu’s boulders, and shapes from quasi-spherical to flattened. The samples were returned to Earth on 6 December 2020. We describe the morphology of >5 grams of returned pebbles and sand. Their diverse color, shape, and structure are consistent with the observed materials of Ryugu; we conclude that they are a representative sample of the asteroid.

UR - http://www.scopus.com/inward/record.url?scp=85125682760&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85125682760&partnerID=8YFLogxK

U2 - 10.1126/science.abj8624

DO - 10.1126/science.abj8624

M3 - Article

C2 - 35143255

AN - SCOPUS:85125682760

SN - 0036-8075

VL - 375

SP - 1011

EP - 1016

JO - Science

JF - Science

IS - 6584

ER -

Pebbles and sand on asteroid (162173) Ryugu: In situ observation and particles returned to Earth

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