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Dive into the research topics where Tokuhiro Nimura is active.

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Featured researches published by Tokuhiro Nimura.


Science | 2006

Near-Infrared Spectral Results of Asteroid Itokawa from the Hayabusa Spacecraft

Masanao Abe; Yasuhiko Takagi; Kohei Kitazato; Shinsuke Abe; Takahiro Hiroi; Faith Vilas; Beth E. Clark; Paul A. Abell; Susan Maria Lederer; K. S. Jarvis; Tokuhiro Nimura; Yoshisuke Ueda; Akira Fujiwara

The near-infrared spectrometer on board the Japanese Hayabusa spacecraft found a variation of more than 10% in albedo and absorption band depth in the surface reflectance of asteroid 25143 Itokawa. Spectral shape over the 1-micrometer absorption band indicates that the surface of this body has an olivine-rich mineral assemblage potentially similar to that of LL5 or LL6 chondrites. Diversity in the physical condition of Itokawas surface appears to be larger than for other S-type asteroids previously explored by spacecraft, such as 433 Eros.


Geophysical Research Letters | 2008

Discoveries on the lithology of lunar crater central peaks by SELENE Spectral Profiler

Tsuneo Matsunaga; Makiko Ohtake; Junichi Haruyama; Yoshiko Ogawa; Ryosuke Nakamura; Yasuhiro Yokota; Tomokatsu Morota; Chikatoshi Honda; Masaya Torii; Masanao Abe; Tokuhiro Nimura; Takahiro Hiroi; Tomoko Arai; Kazuto Saiki; Hiroshi Takeda; Naru Hirata; Shinsuke Kodama; Takamitsu Sugihara; Hirohide Demura; Noriaki Asada; J. Terazono; Hisashi Otake


Meteoritics & Planetary Science | 2007

Global mapping of the degree of space weathering on asteroid 25143 Itokawa by Hayabusa/AMICA observations

Masateru Ishiguro; Takahiro Hiroi; David J. Tholen; Sho Sasaki; Yuji Ueda; Tokuhiro Nimura; Masanao Abe; Beth E. Clark; Aya Yamamoto; Fumi Yoshida; Ryosuke Nakamura; Naru Hirata; Hideaki Miyamoto; Yasuhiro Yokota; Tatsuaki Hashimoto; Takashi Kubota; Akiko M. Nakamura; Robert W. Gaskell; J. Saito


Archive | 2007

Meteorite Analogs of Asteroid 25143 Itokawa: Seeing Beyond the Effects of Grain Size and Space Weathering

Takahiro Hiroi; Masanao Abe; Kohei Kitazato; Shigeo Abe; Sho Sasaki; Masato Ishiguro; Yasuhiko Takagi; B. C. Clark; O. S. Barnouin-Jha; Tokuhiro Nimura


Archive | 2006

Space Weathering of Rock Surface Without Regolith: Laboratory Simulation of Spectral Change

Sho Sasaki; Tokuhiro Nimura; Takahiro Hiroi; Masato Ishiguro; Naru Hirata; Masanao Abe; Yoshisuke Ueda; Akira Yamamoto; B. C. Clark


Archive | 2006

A New Scheme for Estimating the Degree of Space Weathering Through Visible Multiband Spectroscopy Using an ECAS-Type Filter System Such as Hayabusa AMICA

Takahiro Hiroi; Yoshisuke Ueda; Tokuhiro Nimura; Masanao Abe; Masateru Ishiguro; Sho Sasaki


Transactions of The Japan Society for Aeronautical and Space Sciences, Space Technology Japan | 2009

Preliminary Results of the SELENE Terrain Camera

Junichi Haruyama; Makiko Ohtake; Tsuneo Matsunaga; Tomokatsu Morota; Haruo Kawasaki; Chikatoshi Honda; Yasuhiro Yokota; Masaya Torii; Masanao Abe; Hisashi Otake; Tokuhiro Nimura; Yoshiko Ogawa; Atsushi Yamaji; Hiroshi Takeda; Motomaro Shirao; Noriaki Asada; Hirohide Demura; Naru Hirata; Junya Terazono; Shinsuke Kodama; Ryosuke Nakamura; Shigeyuki Minami; Akira Iwasaki; Hideaki Miyamoto; Tomoko Arai; Takamitsu Sugihara; Yasushi Yamaguchi; Kazuto Saiki; Takahiro Hiroi; Sho Sasaki


Archive | 2006

An Attempt of Restricting Olivine Bands in the Modified Gaussian Model

Tokuhiro Nimura; Takahiro Hiroi; Makiko Ohtake; Yoshisuke Ueda; Masanao Abe; Akihiko Fujiwara


Archive | 2006

Preliminary Results from the Hayabusa Near Infrared Spectrometer (NIRS) of Asteroid (25143) Itokawa

Masanao Abe; Yasuhiko Takagi; Kohei Kitazato; Takahiro Hiroi; Shigeo Abe; Faith Vilas; B. C. Clark; Paul A. Abell; Susan Maria Lederer; K. S. Jarvis; Tokuhiro Nimura; Yoshisuke Ueda; Akihiko Fujiwara


Japan Geoscience Union | 2017

Characteristics of mineral compositions of lunar late mare volcanism revealed from Kaguya data

Shinsuke Kato; Tomokatsu Morota; Yasushi Yamaguchi; Sei-ichiro Watanabe; Hisashi Otake; Makiko Ohtake; Tokuhiro Nimura

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Masanao Abe

Planetary Science Institute

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Makiko Ohtake

Japan Aerospace Exploration Agency

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Tsuneo Matsunaga

National Institute for Environmental Studies

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