R
Ryuji Okazaki
Researcher at Kyushu University
Publications - 160
Citations - 2901
Ryuji Okazaki is an academic researcher from Kyushu University. The author has contributed to research in topics: Chondrite & Meteorite. The author has an hindex of 19, co-authored 80 publications receiving 2193 citations. Previous affiliations of Ryuji Okazaki include University of Tokyo.
Papers
More filters
Journal ArticleDOI
Itokawa Dust Particles: A Direct Link Between S-Type Asteroids and Ordinary Chondrites
Tomoki Nakamura,Takaaki Noguchi,Masahiko Tanaka,Michael E. Zolensky,Makoto Kimura,Akira Tsuchiyama,Aiko Nakato,T. Ogami,Hatsumi Ishida,Masayuki Uesugi,Toru Yada,Kei Shirai,Akio Fujimura,Ryuji Okazaki,Scott A. Sandford,Yukihiro Ishibashi,Masanao Abe,Tatsuaki Okada,Munetaka Ueno,Toshifumi Mukai,Makoto Yoshikawa,Jun'ichiro Kawaguchi +21 more
TL;DR: Laboratory analysis of samples returned from an asteroid establishes a direct link between asteroids and meteorites and provides clues to the complex history of the asteroid and its surface.
Journal ArticleDOI
Three-Dimensional Structure of Hayabusa Samples: Origin and Evolution of Itokawa Regolith
Akira Tsuchiyama,Masayuki Uesugi,Takashi Matsushima,Tatsuhiro Michikami,Toshihiko Kadono,Tomoki Nakamura,Kentaro Uesugi,Tsukasa Nakano,Scott A. Sandford,Ryo Noguchi,Toru Matsumoto,Junya Matsuno,Takashi Nagano,Y. Imai,Akihisa Takeuchi,Yoshio Suzuki,T. Ogami,Jun Katagiri,Mitsuru Ebihara,Trevor Ireland,Fumio Kitajima,Keisuke Nagao,Hiroshi Naraoka,Takaaki Noguchi,Ryuji Okazaki,Hisayoshi Yurimoto,Michael E. Zolensky,Toshifumi Mukai,Masanao Abe,Toru Yada,Akio Fujimura,Makoto Yoshikawa,Jun'ichiro Kawaguchi +32 more
TL;DR: Regolith particles on the asteroid Itokawa were recovered by the Hayabusa mission and their three-dimensional structure and other properties, revealed by x-ray microtomography, provide information on regolith formation.
Journal ArticleDOI
Incipient Space Weathering Observed on the Surface of Itokawa Dust Particles
Takaaki Noguchi,Tomoki Nakamura,Makoto Kimura,Michael E. Zolensky,Masahiko Tanaka,Takahito Hashimoto,Mitsuru Konno,Aiko Nakato,T. Ogami,Akio Fujimura,M. Abe,Toru Yada,Toshifumi Mukai,Munetaka Ueno,T. Okada,Kei Shirai,Yukihiro Ishibashi,Ryuji Okazaki +17 more
TL;DR: Evidence of space weathering on particles returned from the S-type asteroid 25143 Itokawa by the Hayabusa spacecraft is reported and texture suggests formation by metamictization and in situ reduction of Fe2+.
Journal ArticleDOI
Radar-Enabled Recovery of the Sutter’s Mill Meteorite, a Carbonaceous Chondrite Regolith Breccia
Peter Jenniskens,Peter Jenniskens,Marc Fries,Qing-Zhu Yin,Michael E. Zolensky,Alexander N. Krot,Scott A. Sandford,Derek W. G. Sears,Robert Beauford,Denton S. Ebel,Jon M. Friedrich,Jon M. Friedrich,Kazuhide Nagashima,Josh Wimpenny,Akane Yamakawa,Kunihiko Nishiizumi,Yasunori Hamajima,Marc W. Caffee,Kees C. Welten,Matthias Laubenstein,Andrew M. Davis,Andrew M. Davis,Steven B. Simon,Philipp R. Heck,Philipp R. Heck,Edward D. Young,I. E. Kohl,Mark H. Thiemens,M. Nunn,Takashi Mikouchi,Kenji Hagiya,Kazumasa Ohsumi,Thomas A. Cahill,Jonathan A. Lawton,David Barnes,Andrew Steele,Pierre Rochette,Kenneth L. Verosub,Jérôme Gattacceca,George Cooper,Daniel P. Glavin,Aaron S. Burton,Aaron S. Burton,Jason P. Dworkin,Jamie E. Elsila,Sandra Pizzarello,Ryan C. Ogliore,Phillipe Schmitt-Kopplin,Mourad Harir,Norbert Hertkorn,A. B. Verchovsky,Monica M. Grady,Keisuke Nagao,Ryuji Okazaki,Hiroyuki Takechi,Takahiro Hiroi,Kenneth D. Smith,Elizabeth A. Silber,Peter Brown,Jim Albers,Doug Klotz,Mike Hankey,Robert Matson,Jeffrey A. Fries,Richard J. Walker,Igor S. Puchtel,Cin-Ty A. Lee,Monica E. Erdman,G. R. Eppich,Sarah M. Roeske,Zelimir Gabelica,Michael Lerche,Michel Nuevo,Michel Nuevo,Beverly Girten,Simon P. Worden +75 more
TL;DR: A comprehensive analysis of some of these fragments shows that the Sutter's Mill meteorite represents a new type of carbonaceous chondrite, a rare and primitive class of meteorites that contain clues to the origin and evolution of primitive materials in the solar system.
Journal ArticleDOI
Oxygen isotopic compositions of asteroidal materials returned from Itokawa by the Hayabusa mission.
Hisayoshi Yurimoto,Ken ichi Abe,M. Abe,Mitsuru Ebihara,Akio Fujimura,Minako Hashiguchi,Ko Hashizume,Trevor Ireland,Shoichi Itoh,Juri Katayama,Chizu Kato,Jun'ichiro Kawaguchi,Noriyuki Kawasaki,Fumio Kitajima,Sachio Kobayashi,Tatsuji Meike,Toshifumi Mukai,Keisuke Nagao,Tomoki Nakamura,Hiroshi Naraoka,Takaaki Noguchi,Ryuji Okazaki,Changkun Park,Naoya Sakamoto,Yusuke Seto,Masashi Takei,Akira Tsuchiyama,Masayuki Uesugi,Shigeyuki Wakaki,Toru Yada,Kosuke Yamamoto,Makoto Yoshikawa,Michael E. Zolensky +32 more
TL;DR: In this article, the authors measured, using secondary ion mass spectrometry, oxygen isotopic compositions of rock particles from asteroid 25143 Itokawa returned by the Hayabusa spacecraft.