K
Kazunori Ogawa
Researcher at Kobe University
Publications - 58
Citations - 1018
Kazunori Ogawa is an academic researcher from Kobe University. The author has contributed to research in topics: Asteroid & Geology. The author has an hindex of 13, co-authored 41 publications receiving 523 citations.
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Journal ArticleDOI
Low thermal conductivity boulder with high porosity identified on C-type asteroid (162173) Ryugu
Matthias Grott,Jörg Knollenberg,Maximilian Hamm,Kazunori Ogawa,Ralf Jaumann,Katharina A. Otto,Marco Delbo,Patrick Michel,Jens Biele,Wladimir Neumann,Martin Knapmeyer,Ekkehard Kührt,Hiroki Senshu,Tatsuaki Okada,Jörn Helbert,Alessandro Maturilli,Nils Müller,Axel Hagermann,Naoya Sakatani,Satoshi Tanaka,Takehiko Arai,Stefano Mottola,Shogo Tachibana,Ivanka Pelivan,Ivanka Pelivan,Line Drube,Jean-Baptiste Vincent,Hajime Yano,C. Pilorget,K-D Matz,Nicole Schmitz,Alexander Koncz,Stefan Schröder,Frank Trauthan,Markus Schlotterer,Christian Krause,Tra-Mi Ho,Aurelie Moussi-Soffys +37 more
TL;DR: In this article, in situ thermal infrared observations of a boulder on the C-type asteroid Ryugu were reported, indicating high boulder porosities as well as a low tensile strength in the few hundred kilopascal range.
Journal ArticleDOI
Boulder size and shape distributions on asteroid Ryugu
Tatsuhiro Michikami,Chikatoshi Honda,Hideaki Miyamoto,Masatoshi Hirabayashi,Axel Hagermann,Terunori Irie,Keita Nomura,Carolyn M. Ernst,Masaki Kawamura,Kiichi Sugimoto,Eri Tatsumi,Tomokatsu Morota,Tomokatsu Morota,Naru Hirata,Takaaki Noguchi,Yuichiro Cho,Shingo Kameda,Toru Kouyama,Y. Yokota,Y. Yokota,Rina Noguchi,Masahiko Hayakawa,Naoyuki Hirata,R. Honda,Moe Matsuoka,Naoya Sakatani,Hidehiko Suzuki,Manabu Yamada,Kazuo Yoshioka,Hirotaka Sawada,Ryodo Hemmi,Hiroshi Kikuchi,Kazunori Ogawa,Sei-ichiro Watanabe,Sei-ichiro Watanabe,Satoshi Tanaka,Makoto Yoshikawa,Yuichi Tsuda,Seiji Sugita,Seiji Sugita +39 more
TL;DR: Watanabe et al. as discussed by the authors used a few hundred Optical Navigation Camera (ONC) images with a pixel scale of approximately 0.65 m, focusing on boulders greater than 5'm in diameter.
Journal ArticleDOI
Thermal conductivity model for powdered materials under vacuum based on experimental studies
TL;DR: In this article, the authors investigated the heat transfer mechanism in powder media in detail, and constructed a new theoretical thermal conductivity model for the vacuum condition using glass beads as a model material.
Journal ArticleDOI
Thermal conductivity of lunar regolith simulant JSC-1A under vacuum
TL;DR: In this article, the authors investigated the temperature and compressional stress dependence of the thermal conductivity of the lunar regolith simulant JSC-1A, and the temperature dependence of sieved JSC1A samples under vacuum conditions.
Journal ArticleDOI
Samples returned from the asteroid Ryugu are similar to Ivuna-type carbonaceous meteorites
Tetsuya Yokoyama,Kazuhide Nagashima,Izumi Nakai,Edward D. Young,Yoshinari Abe,Jérôme Aléon,Conel M. O'd. Alexander,Sachiko Amari,Yuri Amelin,Ken ichi Bajo,Martin Bizzarro,Audrey Bouvier,Richard W. Carlson,Marc Chaussidon,Byeon-Gak Choi,Nicolas Dauphas,Andrew M. Davis,Tommaso Di Rocco,Wataru Fujiya,Ryota Fukai,Ikshu Gautam,Makiko K. Haba,Yuki Hibiya,Hiroshi Hidaka,Hisashi Homma,Peter Hoppe,Gary R. Huss,K. Ichida,Tsuyoshi Iizuka,Trevor Ireland,Akira Ishikawa,Motoo Ito,Shoichi Itoh,Noriyuki Kawasaki,Noriko T. Kita,Kouki Kitajima,Thorsten Kleine,Shintaro Komatani,Alexander N. Krot,Ming-Chang Liu,Yuki Masuda,Kevin D. McKeegan,Mayu Morita,Kazuko Motomura,Frédéric Moynier,Ann N. Nguyen,Larry R. Nittler,M. Onose,Andreas Pack,Changkun Park,Laurette Piani,Liping Qin,Sara S. Russell,Naoya Sakamoto,Maria Schönbächler,Lauren Tafla,Haolan Tang,Kentaro Terada,Yasuko Terada,Tomohiro Usui,Sohei Wada,Meenakshi Wadhwa,Richard J. Walker,Katsuyuki Yamashita,Qing-Zhu Yin,Shigekazu Yoneda,Hiroharu Yui,Ai-Cheng Zhang,Harold C. Connolly,Dante S. Lauretta,Tomoki Nakamura,Hiroshi Naraoka,Takaaki Noguchi,Ryuji Okazaki,Kanako Sakamoto,Hikaru Yabuta,Masanao Abe,Masahiko Arakawa,Atsushi Fujii,Masahiro Hayakawa,Naoyuki Hirata,Naru Hirata,Rie Honda,Chikatoshi Honda,Satoshi Hosoda,Yuichi Iijima,H. Ikeda,Masateru Ishiguro,Yoshiaki Ishihara,Takahiro Iwata,Kosuke Kawahara,Shota Kikuchi,Kohei Kitazato,Koji Matsumoto,Moe Matsuoka,Tatsuhiro Michikami,Yuya Mimasu,Akira Miura,Tomokatsu Morota,Satoru Nakazawa,Noriyuki Namiki,Hirotomo Noda,Rina Noguchi,Naoko Ogawa,Kazunori Ogawa,Tatsuaki Okada,Chisato Okamoto,Go Ono,M. Ozaki,Takanao Saiki,Naoya Sakatani,Hirotaka Sawada,Hiroki Senshu,Yuri Shimaki,Kei Shirai,Seiji Sugita,Yuto Takei,Hiroshi Takeuchi,Satoshi Tanaka,Eri Tatsumi,Fuyuto Terui,Yuichi Tsuda,Ryudo Tsukizaki,Koji Wada,Sei-ichiro Watanabe,Manabu Yamada,Tetsuya Yamada,Yukio Yamamoto,Hajime Yano,Yasuhiro Yokota,Keisuke Yoshihara,Makoto Yoshikawa,Kent Yoshikawa,Shizuho Furuya,Kentaro Hatakeda,Tasuku Hayashi,Yuya Hitomi,K. Kumagai,Akiko Miyazaki,Aiko Nakato,M. Nishimura,Hiromichi Soejima,Ayako I. Suzuki,Toru Yada,Daiki Yamamoto,Kasumi Yogata,M. Yoshitake,Shogo Tachibana,Hisayoshi Yurimoto +148 more
TL;DR: The authors measured the mineralogy and bulk chemical and isotopic compositions of Ryugu samples and concluded that the samples mainly consist of secondary materials that were formed by aqueous alteration in a parent body, from which Ryugu later formed.