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Naoyuki HIRATA

 Assistant Professor
 Department of Planetology
 Graduate School of Science
 Faculty of Science




Research Interests:

 My research focuses on the geology of the icy satellites. I am interested in combining image data obtained by spacecraft and theoretical works such as laboratory experiment and numerical numerical simulation.


Recent Publications: 

  • K. Ohtsuki, H. Kawamura, Naoyuki Hirata, H. Daisaka, H. Kimura (2019) Size of the smallest particles in Saturn's rings, Icarus , in press.
  • L. Xu, Naoyuki Hirata, H. Miyamoto (2019) Spatial distribution of ray craters on Callisto: Implications for ray retention and impactor sources on Jovian satellites, Journal of Geophysical Research Planets , in press.
  • Luyuan Xu, Naoyuki Hirata, Hideaki Miyamoto (2017). Ray craters on Ganymede: Implications for cratering apex-antapex asymmetry and surface modification processes Icarus , Volume 295, Pages 140?148.
  • Naoyuki Hirata (2017). Spatial distribution of impact craters on Deimos Icarus , Volume 288, Pages 69?77.
  • Naoyuki Hirata (2016). Timing of the faulting on the Wispy Terrain of Dione based on stratigraphic relationships with impact craters Journal of Geophysical Research: Planets , Volume 121, Pages 2325?2334.
  • Naoyuki Hirata (2016). Differential impact cratering of Saturn's satellites by heliocentric impactors Journal of Geophysical Research: Planets , Volume 121, Issue 2, Pages 111?117.
  • Naoyuki Hirata, Hideaki Miyamoto (2016). Rayed craters on Dione: Implication for the dominant surface alteration process Icarus , Volume 274, Pages 116?121.
  • Naoyuki Hirata, Hideaki Miyamoto, Adam Showman (2014) Particle deposition on the saturnian satellites from ephemeral cryovolcanism on Enceladus. Geophysical Research Letters , Volume 41, Issue 12, Pages 4135?4141.
  • Naoyuki Hirata, Hideaki Miyamoto (2012). Dust levitation as a major resurfacing process on the surface of a saturnian icy satellite, Atlas. Icarus , Volume 220, Issue 1, Pages 106?113.
  • S. Watanabe, M. Hirabayashi, Naru Hirata, Naoyuki Hirata, et al. (2019), Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu - A spinning top?shaped rubble pile, Science 364(6437), 268-272.
  • S. Sugita, R. Honda, T. Morota, S. Kameda, H. Sawada, E. Tatsumi, M. Yamada, C. Honda, Y. Yokota, T. Kouyama, N. Sakatani, K. Ogawa, H. Suzuki, T. Okada, N. Namiki, S. Tanaka, Y. Iijima, K. Yoshioka, M. Hayakawa, Y. Cho, M. Matsuoka, Naru Hirata, Naoyuki Hirata, et al. (2019), The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes, Science 364(6437), eaaw0422.
  • O. S. Barnouin, M. G. Daly, E. E. Palmer, R. W. Gaskell, J. R. Weirich, C. L. Johnson, M. M. Al Asad, J. H. Roberts, M. E. Perry, H. C. M. Susorney, R. T. Daly, E. B. Bierhaus, J. A. Seabrook, R. C. Espiritu, A. H. Nair, L. Nguyen, G. A. Neumann, C. M. Ernst, W. V. Boynton, M. C. Nolan, C. D. Adam, M. C. Moreau, B. Rizk, C. Y. Drouet D’Aubigny, E. R. Jawin, K. J. Walsh, P. Michel, S. R. Schwartz, R.-L. Ballouz, E. M. Mazarico, D. J. Scheeres, J. W. McMahon, W. F. Bottke, S. Sugita, Naru Hirata, Naoyuki Hirata (2019) Shape of (101955) Bennu indicative of a rubble pile with internal stiffness, Nature Geoscience 12, pages247?252.
  • M. Hirabayashi, E. Tatsumi, H. Miyamoto, G. Komatsu, S. Sugita, S. Watanabe, D. J. Scheeres, O. S. Barnouin, P. Michel, C. Honda, T. Michikami, Y. Cho, T. Morota, N. Hirata, Naoyuki Hirata et al. (2019), The western bulge of 162173 Ryugu formed as a result of a recent deformation process, Astrophysical Journal Letters 874, Number 1.
  • K. Kitazato, R. E. Milliken, T. Iwata, M. Abe, M. Ohtake, S. Matsuura, T. Arai, Y. Nakauchi, T. Nakamura, M. Matsuoka, H. Senshu, Naru Hirata, T. Hiroi, C. Pilorget, R. Brunetto, F. Poulet, L. Riu, J.-P. Bibring, D. Takir, D. L. Domingue, F. Vilas, M. A. Barucci, D. Perna, E. Palomba, A. Galiano, K. Tsumura, T. Osawa, M. Komatsu, A. Nakato, T. Arai, N. Takato, T. Matsunaga, Y. Takagi, K. Matsumoto, T. Kouyama, Y. Yokota, E. Tatsumi, N. Sakatani, Y. Yamamoto, T. Okada, S. Sugita, R. Honda, T. Morota, S. Kameda, H. Sawada, C. Honda, M. Yamada, H. Suzuki, K. Yoshioka, M. Hayakawa, K. Ogawa, Y. Cho, K. Shirai, Y. Shimaki, Naoyuki Hirata et al. (2019) The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy, Science 364(6437), 272-275
  • T. Michikami, C. Honda, H. Miyamoto, M. Hirabayashi, A. Hagermann, T. Irie, K. Nomura, C. M. Ernst, M. Kawamura, K. Sugimoto, E. Tatsumi, T. Morota, N. Hirata, T. Noguchi, Y. Cho, S. Kameda, T. Kouyama, Y. Yokota, R. Noguchi, M. Hayakawa, Naoyuki Hirata, et al. (2019) Boulder size and shape distributions on asteroid Ryugu, Icarus, in press.


  • Academic Associations: 

Department of Planetology, Graduate School of Science, Kobe University

ADDRESS
1-1, Rokkodai-cho, Nada-ku, Kobe, Hyogo, Japan, 657-8501

TEL: (+81)-78-803-6483
FAX :(+81)-78-803-5791