Results 1 to 10 of about 4,638 (257)

Hydrothermal alteration of Ryugu from a disruptive impact recorded in a returned sample [PDF]

Nature Communications
Samples returned from C-type asteroid (162173) Ryugu by JAXA’s Hayabusa2 spacecraft provide material free of terrestrial alteration for analysis. Previous work shows that Ryugu was aqueously altered below 100 °C under neutral to alkaline fluid conditions.
Devin L. Schrader, Thomas J. Zega, Maizey C. Benner, Jemma Davidson   +3 more
doaj   +4 more sources

Asteroid Ryugu before the Hayabusa2 encounter [PDF]

Progress in Earth and Planetary Science, 2018
Asteroid (162173) Ryugu is the target object of Hayabusa2, an asteroid exploration and sample return mission led by Japan Aerospace Exploration Agency (JAXA).
Koji Wada, Matthias Grott, Patrick Michel, Kevin J. Walsh, Antonella M. Barucci, Jens Biele, Jürgen Blum, Carolyn M. Ernst, Jan Thimo Grundmann, Bastian Gundlach, Axel Hagermann, Maximilian Hamm, Martin Jutzi, Myung-Jin Kim, Ekkehard Kührt, Lucille Le Corre, Guy Libourel, Roy Lichtenheldt, Alessandro Maturilli, Scott R. Messenger, Tatsuhiro Michikami, Hideaki Miyamoto, Stefano Mottola, Thomas Müller, Akiko M. Nakamura, Larry R. Nittler, Kazunori Ogawa, Tatsuaki Okada, Ernesto Palomba, Naoya Sakatani, Stefan E. Schröder, Hiroki Senshu, Driss Takir, Michael E. Zolensky, International Regolith Science Group (IRSG) in Hayabusa2 project   +34 more
doaj   +11 more sources

Bennu and Ryugu constituents from samples IR analyses and potential source of terrestrial planets’ ingredients [PDF]

Nature Communications
Samples collected on carbonaceous asteroids and preserved from terrestrial alteration are key witnesses of the early evolution of the Solar System. Here we present the results of the characterization, by the near-IR hyperspectral microscope MicrOmega ...
C. Pilorget, T. Okada, J.-P. Bibring, D. Loizeau, K. Hatakeda, L. Nardelli, L. Riu, R. Sheppard, T. Jiang, M. Mahlke, R. Brunetto, D. Baklouti, R. Fukai, M. Abe, A. Aléon-Toppani, Y. Enokido, V. Hamm, S. Kawasaki, C. Lantz, A. Miyazaki, A. Moussi-Soffys, M. Nishimura, F. Poulet, R. Tahara, T. Usui, T. Yada, K. Yogata   +26 more
doaj   +3 more sources

Primordial aqueous alteration recorded in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu [PDF]

Nature Communications
We report primordial aqueous alteration signatures in water-soluble organic molecules from the carbonaceous asteroid (162173) Ryugu by the Hayabusa2 spacecraft of JAXA.
Yoshinori Takano, Hiroshi Naraoka, Jason P. Dworkin, Toshiki Koga, Kazunori Sasaki, Hajime Sato, Yasuhiro Oba, Nanako O. Ogawa, Toshihiro Yoshimura, Kenji Hamase, Naohiko Ohkouchi, Eric T. Parker, José C. Aponte, Daniel P. Glavin, Yoshihiro Furukawa, Junken Aoki, Kuniyuki Kano, Shin-ichiro M. Nomura, Francois-Regis Orthous-Daunay, Philippe Schmitt-Kopplin, Hayabusa2-initial-analysis SOM team, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda, Shogo Tachibana   +42 more
doaj   +3 more sources

Uracil in the carbonaceous asteroid (162173) Ryugu [PDF]

Nature Communications, 2023
Uracil was identified in the sample returned from the asteroid Ryugu. Having been provided to the early Earth as a component in such asteroidal materials, these molecules might have played a role for prebiotic chemical evolution on the early ...
Yasuhiro Oba, Toshiki Koga, Yoshinori Takano, Nanako O. Ogawa, Naohiko Ohkouchi, Kazunori Sasaki, Hajime Sato, Daniel P. Glavin, Jason P. Dworkin, Hiroshi Naraoka, Shogo Tachibana, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Sei-ichiro Watanabe, Yuichi Tsuda, Hayabusa2-initial-analysis SOM team   +32 more
doaj   +4 more sources

Near-infrared spectral variation in Ryugu particles and implication for rapid space weathering by solar UV radiation. [PDF]

Sci Rep
The 2.7 µm absorption band, represented by OH groups, in the near-infrared reflectance spectra of primitive Solar System bodies could be an indicator of the cause and degree of space weathering.
Furukawa S, Okada T, Hatakeda K, Kanemaru R, Yogata K, Yada T, Abe M, Usui T, Pilorget C, Hamm V, Brunetto R, Loizeau D, Riu L, Le Pivert-Jolivet T, Sasaki S, Egashira Y, Hiroi T, Kaiden H, Miyazaki A, Nagashima K, Tahara R, Sugiyama Y, Nakano A, Ojima T, Hitomi Y, Kumagai K, Nishimura M, Bibring JP.   +27 more
europepmc   +2 more sources

The Ni isotopic composition of Ryugu reveals a common accretion region for carbonaceous chondrites. [PDF]

Sci Adv
The isotopic compositions of samples returned from Cb-type asteroid Ryugu and Ivuna-type (CI) chondrites are distinct from other carbonaceous chondrites, which has led to the suggestion that Ryugu/CI chondrites formed in a different region of the ...
Spitzer F, Kleine T, Burkhardt C, Hopp T, Yokoyama T, Abe Y, Aléon J, O'D Alexander CM, Amari S, Amelin Y, Bajo KI, Bizzarro M, Bouvier A, Carlson RW, Chaussidon M, Choi BG, Dauphas N, Davis AM, Di Rocco T, Fujiya W, Fukai R, Gautam I, Haba MK, Hibiya Y, Hidaka H, Homma H, Hoppe P, Huss GR, Ichida K, Iizuka T, Ireland TR, Ishikawa A, Itoh S, Kawasaki N, Kita NT, Kitajima K, Komatani S, Krot AN, Liu MC, Masuda Y, Morita M, Moynier F, Motomura K, Nakai I, Nagashima K, Nguyen A, Nittler L, Onose M, Pack A, Park C, Piani L, Qin L, Russell SS, Sakamoto N, Schönbächler M, Tafla L, Tang H, Terada K, Terada Y, Usui T, Wada S, Wadhwa M, Walker RJ, Yamashita K, Yin QZ, Yoneda S, Young ED, Yui H, Zhang AC, Nakamura T, Naraoka H, Noguchi T, Okazaki R, Sakamoto K, Yabuta H, Abe M, Miyazaki A, Nakato A, Nishimura M, Okada T, Yada T, Yogata K, Nakazawa S, Saiki T, Tanaka S, Terui F, Tsuda Y, Watanabe SI, Yoshikawa M, Tachibana S, Yurimoto H.   +90 more
europepmc   +3 more sources

Organic Matter in the Asteroid Ryugu: What We Know So Far [PDF]

Life, 2023
The Hayabusa2 mission was tasked with returning samples from the C-complex asteroid Ryugu (1999 JU3), in order to shed light on the formation, evolution and composition of such asteroids.
Christian Potiszil, Masahiro Yamanaka, Chie Sakaguchi, Tsutomu Ota, Hiroshi Kitagawa, Tak Kunihiro, Ryoji Tanaka, Katsura Kobayashi, Eizo Nakamura   +8 more
doaj   +2 more sources

Mechanical properties of rubble pile asteroids (Dimorphos, Itokawa, Ryugu, and Bennu) through surface boulder morphological analysis. [PDF]

Nat Commun
Planetary defense efforts rely on estimates of the mechanical properties of asteroids, which are difficult to constrain accurately from Earth. The mechanical properties of asteroid material are also important in the interpretation of the Double Asteroid ...
Robin CQ, Duchene A, Murdoch N, Vincent JB, Lucchetti A, Pajola M, Ernst CM, Daly RT, Barnouin OS, Raducan SD, Michel P, Hirabayashi M, Stott A, Cuervo G, Jawin ER, Trigo-Rodriguez JM, Parro LM, Sunday C, Vivet D, Mimoun D, Rivkin AS, Chabot NL.   +21 more
europepmc   +2 more sources

Abundant microchondrules in 162173 Ryugu suggest a turbulent origin for primitive asteroids. [PDF]

Nat Commun
Chondrules are a characteristic feature of primitive Solar System materials and are common in all primitive meteorites except the CI-chondrites. They are thought to form owing to melting of solid dust aggregates by energetic processing within the solar ...
Genge MJ, Almeida NV, van Ginneken M, Pinault L, Salge T, Wozniakiewicz PJ, Yano H, Desch SJ.   +7 more
europepmc   +2 more sources