Curriculum Vitaes
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  2. Masanao Abe

Masanao Abe

  (安部 正真)

Profile Information

Affiliation
Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency
Researcher number
00270439
ORCID ID
 https://orcid.org/0000-0003-4780-800X
J-GLOBAL ID
200901004756228297
researchmap Member ID
5000050882

Research Interests

 3

Research Areas

 1

Papers

 197
  • Rui Tahara, Kentaro Hatakeda, Masahiro Nishimura, Kasumi Yogata, Ryota Fukai, Akiko Miyazaki, Toru Yada, Yuma Enokido, Masanao Abe, Seiya Kawasaki, Ryosuke Sakurai, Tatsuaki Okada, Cedric Pilorget, Jean‐Pierre Bibring, Vincent Hamm, Lionel Lourit, Damien Loizeau, Lucie Riu, Koki Yumoto, Yuichiro Cho, Seiji Sugita, Shumpei Nakahara, Shoki Mori, Yuta Aikyo, Shingo Kameda, Roger Stabbins, Yuta Shimizu, Hideaki Miyamoto, Yuya Hitomi, Arisa Nakano, Kana Nagashima, Haruna Sugahara, Shino Suzuki, Shunta Kimura, Tomohiro Usui
    Meteoritics & Planetary Science, Jan, 2026  
  • Ryota Fukai, Masahiro Nishimura, Koki Yumoto, Yuichiro Cho, Yuta Shimizu, Moe Matsuoka, Eri Tatsumi, Soichiro Furukawa, Ryosuke Sakurai, Toru Yada, Kentaro Hatakeda, Kasumi Yogata, Yuma Enokido, Rui Tahara, Akiko Miyazaki, Seiya Kawasaki, Rei Kanemaru, Seiji Sugita, Shoki Mori, Shumpei Nakahara, Yuta Aikyo, Hideaki Miyamoto, Cedric Pilorget, Damien Loizeau, Laura Nardelli, Rachel Sheppard, Cateline Lantz, Lucie Riu, Jean‐Pierre Bibring, Rosario Brunetto, Tatsuaki Okada, Masanao Abe, Tomohiro Usui
    Meteoritics & Planetary Science, Nov 25, 2025  
    Abstract Analyzing primitive extraterrestrial samples from asteroids is key to understanding the evolution of the early solar system. The OSIRIS‐REx mission returned samples from the B‐type asteroid Bennu, providing a valuable opportunity to compare them with the Ryugu samples collected by the Hayabusa2 mission. This study examines the representativeness of a fraction of the Bennu samples, which was allocated from NASA to JAXA, by nondestructive characterization of their physical and spectral properties without atmospheric exposure. The reflectance and observed spectral features in the visible‐to‐infrared range of the Bennu sample resemble those from the spectroscopic analysis of different fractions. Additionally, we found differences in the slope of the visible range and band‐center of ~2.7 μm band between the samples and the asteroid surface, which could be explained by the degree of space weathering. A comparative analysis of the Bennu and Ryugu samples revealed spectral similarities, including absorption features indicative of Mg‐rich phyllosilicates, organics, and carbonates, without any evidence of sampling bias or terrestrial alteration. This finding can be used as a benchmark for subsequent Ryugu–Bennu comparative studies.
  • 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. Aleon-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
    NATURE COMMUNICATIONS, 16(1), Nov 4, 2025  
  • Ito M., Tomioka N., Uesugi M., Uesugi K., Yamaguchi A., Imae N., Ohigashi T., Shirai N., Nakato A., Yogata K., Yada T., Abe M., Liu M.-C., Greenwood R., Yuzawa H., Kimura M., Phase2 curation Kochi team
    Planetary People - The Japanese Society for Planetary Sciences, 34(2) 100-114, Jun 25, 2025  
  • S. Furukawa, T. Okada, K. Hatakeda, R. Kanemaru, K. Yogata, T. Yada, M. Abe, T. Usui, C. Pilorget, V. Hamm, R. Brunetto, D. Loizeau, L. Riu, T. Le Pivert-Jolivet, S. Sasaki, Y. Egashira, T. Hiroi, H. Kaiden, A. Miyazaki, K. Nagashima, R. Tahara, Y. Sugiyama, A. Nakano, T. Ojima, Y. Hitomi, K. Kumagai, M. Nishimura, J.-P. Bibring
    Scientific Reports, 15(1), Apr 26, 2025  
More

Misc.

 494
  • 酒向重行, 土居守, 高梨直紘, 時田幸一, 井原隆, 宇都宮宏行, 早野淳二, 諸隈智貴, 古澤久徳, 小宮山裕, 八木雅文, 安部正真, 長谷川直, 大杉節, 山下卓也, 植村誠, 川端弘治, 新井彰
    日本天文学会年会講演予稿集, 2007 261, Aug 20, 2007  
  • 安部正真, 吉川真, 長谷川直, 北里宏平, 川上恭子, 猿楽祐樹, 黒田大介, 木下大輔
    日本天文学会年会講演予稿集, 2007 145, Aug 20, 2007  
  • 中川, 大輔, 安部, 智美, 落合, 多恵, 畠, 正真, 桜井, 智生, 佐藤, 清, 清水, 勧一朗, 原田, 潤太, ナカガワ, ダイスケ, アベ, トモミ, オチアイ, タエ, ハタ, マサナオ, サクライ, トモオ, サトウ, キヨシ, シミズ, カンイチロウ, ハラダ, ジュンタ
    東京慈恵会医科大学雑誌, 122(4) 173, Jul 15, 2007  
    type:article source:The Jikei University School of Medicine
  • D. J. Scheeres, M. Abe, M. Yoshikawa, R. Nakamura, R. W. Gaskell, P. A. Abell
    ICARUS, 188(2) 425-429, Jun, 2007  
  • 安部正真, 北里宏平, 猿楽祐樹, 川勝康弘, 高遠徳尚, 森敦, 木下大輔
    太陽系科学シンポジウム, 28th 1-4, Jun, 2007  
  • 安部正真
    ISASニュース, (314) 1-3, May, 2007  
  • Takagi Yasuhiko, Hasegawa Sunao, Yano Hajime, Teramoto Keisuke, Yamamoto Satoru, Sugita Seiji, Kurosawa Kosuke, Nakada Tesshin, Honda Chikatoshi, Abe Masanao
    宇宙利用シンポジウム, 23rd 182-184, Mar, 2007  
    We performed systematic impact cratering experiments in microgravity and vacuum environment with impact velocities larger than 100 m/sec and obtained data on diameter of crater formed in the environment. The experiments showed that the drop tower is an appropriate tool for studies of surface processes on small bodies. The result shows that the formation time and final diameter of crater formed in the glass beads or quartz sand layer are not controlled by the gravity.
  • 安部 正真, 川勝 康弘
    日本天文学会2007年春季年会, 2007  
  • 安部 正真, 川勝 康弘
    第7回宇宙科学シンポジウム, 3-36, 2007  
  • 安部 正真
    宇宙探査シンポジウム, 14, 2007  
  • 春山純一, 諸田智克, 大竹真紀子, 本田親寿, 横田康弘, 鳥居雅也, 安部正真, 松永恒雄, 小川佳子
    日本惑星科学会秋季講演会予稿集, 2007 63-63, 2007  
    The SELENE will carry an optical instrument called Lunar Imager/Spectrometer (LISM). The LISM consists of three optical sub-instruments: the Terrain Camera (TC), the Multi-band Imager (MI), and the Spectral Profiler (SP). LISM will provide the data for scientific knowledge and possible utilization of the Moon. In this presentation, we will introduce the LISM operation plan with the planned SELENE orbit.
  • 川上恭子, 安部正真, 北里宏平, 猿楽祐樹, 木下大輔, 長谷川直, 黒田大介, 吉川真, 和田武彦, 板由房, 春日敏測, 宮坂正大
    日本惑星科学会秋季講演会予稿集, 2007 14-14, 2007  
    Hayabusa 2 is an asteroid sample return mission following Hayabusa mission. This mission is now under study and mission target is c-type asteroid 1999JU3. From summer 2007 to April 2008 the observation from the earth is favorable conditions. This chance of observation is the first in 8 years from discovery. About 1999JU3 we had known only spectral type until now so we had observed lightcurve of it in July 2007. As a result we have found that its rotational period is about under 6 hours. This time, we will report about information of 1999JU3 we had get until now for example the result of lightcurve from July to September and about the result of AKARI in May and so on.
  • 北里宏平, 安部正真, 石黒正晃
    日本惑星科学会秋季講演会予稿集, 2007 106-106, 2007  
    The spin states of the small solar system objects can be altered by a net torque arising from the anisotropic thermal re-emission of sunlight on the surface, the so-called YORP effect. We present the results of ground-based observations of the near-Earth asteroid Itokawa, which is the target asteroid of the Hayabusa spacec, and its comparison with the theoretical model of Itokawa's YORP.
  • 安部正真, 北里宏平, 吉川真, 斉藤潤, 石黒正晃, 向井正, 阿部新助, 岡田達明, 山本幸生, 小川和律, 出村裕英, 平田成, 寺薗淳也, ガスケル ロバート, 小湊隆
    日本惑星科学会秋季講演会予稿集, 2007 107-107, 2007  
    The Hayabusa spacecraft, which was launched in May 2003, arrived at Asteroid Ito-kawa in September 2005, and it made observations of Itokawa and tried touch down in about three months.Hayabusa has four scientific instruments, that is Multi-Spectral Telescopic Imager (AMICA), Laser Altimeter (LIDAR), Near-Infrared Spectrometer (NIRS), and X-ray Fluorescence Spectrometer (XRS). The data obtained by these instruments were firstly analyzed by Hayabusa Science Team and some of the results have been pub-lished as scientific papers. At the same time, the science team was preparing to open them to the public and this work has almost been done. Therefore the science team release the data archives to public from April 24, 2007. All the scientific data that Hayabusa obtained are open to the public.The Hayabusa data archives can be accessed from the following web site:(URL) http://hayabusa.sci.isas.jaxa.jp/
  • Kitazato Kohei, Abe Masanao, Ishiguro Masateru
    Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007 106-106, 2007  
    The spin states of the small solar system objects can be altered by a net torque arising from the anisotropic thermal re-emission of sunlight on the surface, the so-called YORP effect. We present the results of ground-based observations of the near-Earth asteroid Itokawa, which is the target asteroid of the Hayabusa spacec, and its comparison with the theoretical model of Itokawa's YORP.
  • Abe Masanao, Ogawa Kazutoshi, Demura Hirohide, Hirata Naru, Terazono Jun-ya, Gaskell Robert, Kominato Takashi, Hayabusa science team, Kitazato Kohei, Yoshikawa Makoto, Saito Jun, Ishiguro Masateru, Mukai Tadashi, Abe Shinsuke, Okada Tatsuaki, Yamamoto Yukio
    Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007 107-107, 2007  
    The Hayabusa spacecraft, which was launched in May 2003, arrived at Asteroid Ito-kawa in September 2005, and it made observations of Itokawa and tried touch down in about three months.Hayabusa has four scientific instruments, that is Multi-Spectral Telescopic Imager (AMICA), Laser Altimeter (LIDAR), Near-Infrared Spectrometer (NIRS), and X-ray Fluorescence Spectrometer (XRS). The data obtained by these instruments were firstly analyzed by Hayabusa Science Team and some of the results have been pub-lished as scientific papers. At the same time, the science team was preparing to open them to the public and this work has almost been done. Therefore the science team release the data archives to public from April 24, 2007. All the scientific data that Hayabusa obtained are open to the public.The Hayabusa data archives can be accessed from the following web site:(URL) http://hayabusa.sci.isas.jaxa.jp/
  • Kawakami Kyoko, Ita Yoshihusa, Abe Masanao, Kitazato Kohei, Sarugaku Yuki, Kinosita Daisuke, Hasegawa Sunao, Kuroda Daisuke, Yoshikawa Makoto, Wada Takehiko
    Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007 14-14, 2007  
    Hayabusa 2 is an asteroid sample return mission following Hayabusa mission. This mission is now under study and mission target is c-type asteroid 1999JU3. From summer 2007 to April 2008 the observation from the earth is favorable conditions. This chance of observation is the first in 8 years from discovery. About 1999JU3 we had known only spectral type until now so we had observed lightcurve of it in July 2007. As a result we have found that its rotational period is about under 6 hours. This time, we will report about information of 1999JU3 we had get until now for example the result of lightcurve from July to September and about the result of AKARI in May and so on.
  • Haruyama Junichi, LISM WG, Morota Tomokatsu, Ohtake Makiko, Honda Chikatoshi, Yokota Yasuhiro, Torii Masaya, Abe Masanao, Matsunaga Tsuneo, Ogawa Yoshiko
    Abstracts for fall meeting of the Japanese Society for Planetary Science, 2007 63-63, 2007  
    The SELENE will carry an optical instrument called Lunar Imager/Spectrometer (LISM). The LISM consists of three optical sub-instruments: the Terrain Camera (TC), the Multi-band Imager (MI), and the Spectral Profiler (SP). LISM will provide the data for scientific knowledge and possible utilization of the Moon. In this presentation, we will introduce the LISM operation plan with the planned SELENE orbit.
  • 吉川真, 矢野創, 安部正真, 岩田隆浩, 川勝康弘, 田中智, 森治, 吉光徹雄, 藤原顕, 川口淳一郎, 高木靖彦, 出村裕英, 野口高明, 宮本英昭
    日本天文学会年会講演予稿集, 2006 86, Aug 20, 2006  
  • Thomas G. Müller, T. Sekiguchi, M. Kaasalainen, M. Abe, S. Hasegawa
    Proceedings of the International Astronomical Union, 2(236) 261-266, Aug, 2006  
  • H Yano, T Kubota, H Miyamoto, T Okada, D Scheeres, Y Takagi, K Yoshida, M Abe, S Abe, O Barnouin-Jha, A Fujiwara, S Hasegawa, T Hashimoto, M Ishiguro, M Kato, J Kawaguchi, T Mukai, J Saito, S Sasaki, M Yoshikawa
    SCIENCE, 312(5778) 1350-1353, Jun, 2006  
  • M Abe, Y Takagi, K Kitazato, S Abe, T Hiroi, F Vilas, BE Clark, PA Abell, SM Lederer, KS Jarvis, T Nimura, Y Ueda, A Fujiwara
    SCIENCE, 312(5778) 1334-1338, Jun, 2006  
  • A Fujiwara, J Kawaguchi, DK Yeomans, M Abe, T Mukai, T Okada, J Saito, H Yano, M Yoshikawa, DJ Scheeres, O Barnouin-Jha, AF Cheng, H Demura, RW Gaskell, N Hirata, H Ikeda, T Kominato, H Miyamoto, AM Nakamura, R Nakamura, S Sasaki, K Uesugi
    SCIENCE, 312(5778) 1330-1334, Jun, 2006  
  • 矢野創, 安部正真, 藤原顕
    太陽系科学シンポジウム, 27th 45-48, Mar, 2006  
  • 安部正真, 高木靖彦, 松永恒雄, 長谷川直, 二村徳宏
    搭載機器基礎開発実験経費・宇宙科学推進戦略的開発研究経費実績報告書, 2004 79-82, Mar, 2006  
  • 安部 正真, 川勝 康弘
    Proceedings of 25th ISTS meeting 25, 2006  
  • 安部 正真, 川勝 康弘
    第6回宇宙科学シンポジウム, 1-8, 2006  
  • 安部 正真, 川勝 康弘
    日本地球惑星科学連合2006年大会, 231-13, 2006  
  • 安部 正真, 佐々木 晶
    Nature (in press), 2006  Peer-reviewed
  • 安部 正真
    中華民國物理學會年會 (印刷中), 2006  
  • 安部 正真
    木曽シュミットシンポジウム (印刷中), 2006  
  • 安部 正真
    Proceedings of 25th ISTS meeting 2006-k-25, 2006  
  • 安部 正真
    ほうおう座流星群大出現50周年記念シンポジウム (印刷中), 2006  
  • 安部 正真
    天体スペクトル研究会 11(印刷中), 2006  
  • 安部 正真
    Abstract of COSPAR Scientific Assembly 36, 2006  
  • 安部 正真
    Abstract of COSPAR 36(印刷中), 2006  
  • 安部 正真
    37th Lunar and Planetary Science Conference 37, 2352, 2006  
  • 安部 正真
    Abstract of Lunar and Planetary Science Conference 37, 2352, 2006  
  • 安部 正真
    日本地球惑星科学連合2006年大会, 231-15, 2006  
  • Yoshikawa Makoto, Yoshimitsu Tetsuo, Takagi Yasuhiko, Demura Hirohide, Noguchi Takaaki, Miyamoto Hideaki, Kawaguchi Jun'ichiro, Fujiwara Akira, Abe Masanao, Iwata Tkahiro, Kawakatsu Yasuhiro, Tanaka Satoshi, Mori Osamu, Yano Hajime
    Abstracts for fall meeting of the Japanese Society for Planetary Science, 2006 7-7, 2006  
    The observation of Asteroid Itokawa by Hayabusa spacecraft has brought us a lot of new knowledge for very small (about 500m in length) S-type asteroid. We already have started to consider next space mission to small bodies in the solar system. For the next asteroid mission, we would like to explore C-type asteroid, which is also major type in the asteroid belt. This type of asteroid is supposed to have organic matter or water more than S-type asteroid, and it is important to study the material related to life. In this paper, we present the current plan for the next exploration to asteroids. We also want to encourage many researchers to join our asteroid mission.
  • 安部正真
    宇宙科学技術連合講演会講演集(CD-ROM), 50th 2H09, 2006  
  • 佐々木晶, 石黒正晃, 廣井孝弘, 宮本英昭, 二村徳尚, 平田成, 安部正真, 山本彩, 中村良介, 出村裕英, 齋藤潤, 北里宏平
    日本惑星科学会秋季講演会予稿集, 2006 24-6, 2006  
    In 2005, HAYABUSA observed an S-type asteroid Itokawa (with size of 550m) by onboard camera AMICA (Saito et al., 2006). Almost 80% of the surface is rough and boulder-rich but it has weathered spectrum on average. Optically, the surface of Itokawa is divided into brighter (and bluer) areas and darker (and redder) areas. In rough zones, dark boulder-rich surfaces usually superpose on bright materials. We can interpret impact-induced seismic shaking or shaking at planetary encounters should remove dark weathered boulder-rich surface to expose underlying relatively fresh bright area. High resolution images indicate that these bouldered surface are optically weathered. To check the possibility that the rock surface could be weathered, we irradiate pulse laser on meteorite fragments with cut flat surface under vacuum. For comparison, we also irradiate pellet samples where particle size is smaller than 125 microns. Fresh meteorites NWA1794 and Bensour were chosen because spectral observation of Itokawa suggested its similarity with LL5 and LL6 chondrites. As expected, significant darkening and reddening are observed at irradiating pellet samples.
  • Takagi Yasuhiko, Abe Masanao, Hasegawa Sunao, Yano Hajime, Yamamoto Satoru, Sugita Seiji, Teramoto Keisuke, Kurosawa Kousuke, Nakata Tesshin, Honda Chikatoshi
    Abstracts for fall meeting of the Japanese Society for Planetary Science, 2006 26-26, 2006  
    Impact cratering experiments in microgravity environment were performed using a drop tower. The results showed no gravity effect. Details of experimental procedures and results will be presented at the session.
  • 川勝康弘, 安部正真, 川口淳一郎
    宇宙科学技術連合講演会講演集(CD-ROM), 50th 3G16, 2006  
  • 矢野創, 藤原顕, 長谷川直, 安部正真, 高山和喜, 吉田和哉, 高木靖彦, 土屋和雄, 花田俊也, 八坂哲雄
    宇宙科学技術連合講演会講演集(CD-ROM), 50th 2H14, 2006  
  • 廣井孝弘, 安部正真, 北里宏平, 阿部新助, 佐々木晶, 石黒正晃, 高木靖彦, 二村徳宏
    日本惑星科学会秋季講演会予稿集, 2006 23-5, 2006  
    Concerning the controversy that the visible and near-infrared (NIR) reflectance spectra of the S-type asteroids and ordinary chondrites which are the most abundant in the near-Earth region do not match with each other, especially the hypothesis of space weathering had been strongest as the explanation in the past. As the result of visible and NIR observations of an S-type asteroid 25143 Itokawa by the Hayabusa Mission, such idea has become even more assuring. Itokawa consists of bright and dark portions in general, and both of those regions in any scale show spectra indicating a mineral assemblage consistent with only those of LL chondrites among all known meteorites, wherein the only differences are the mean optical path length and the degree of space weathering. The fact that an asteroid which is made of an LL-chondrite material and space-weathered to look as an S-type asteroid suggests that many more S asteroids made of ordinary-chondrite materials (including H and L types) exist in the near-Earth region.
  • 北里宏平, 安部正真, CLARK Beth E, 阿部新助, 石黒正晃, 高木靖彦, 廣井孝弘, BARNOIN‐JHA Olivier S, 中村昭子, 佐々木晶
    日本惑星科学会秋季講演会予稿集, 2006 41-23, 2006  
    The near-infrared spectrometer (NIRS) on the Hayabusa spacecraft obtained spatially resolved reflectance spectra of 25143 Itokawa between September 12 and November 24, 2005. In this study, we had modeled a photometric function of the asteroid surface based on the observed spectral data and have investigated the surface heterogeneity of asteroid Itokawa.
  • 阿部新助, 向井正, 中村良介, 平田成, BARNOUIN‐JHA Olivier, GASKELL Robert, 安部正真, 北里宏平, 石黒正晃
    日本惑星科学会秋季講演会予稿集, 2006 21-3, 2006  
    The laser altimetry (LIDAR) aboard the Hayabusa spacecraft measured the surface topography of the asteroid Itokawa and the mass calculated by spacecraft position without orbiting. The mass of Itokawa was estimated as 3.5 x 1010 kg, implying a bulk density of 1.9 g/cm3 and a bulk porosity of -40% when assuming chondritic meteorite composition(density of 3.2 g/cm3) (Abe et al, Science, 2006). In order to investigate the origin of Itokawa, especially for the interior structure and surface characteristics, we will discuss about the principal axis of inertia calculated by Itokawa's shape model and also present a 50m sized biggest bouldar, named 'Yoshinodai', on the surface by using near-infrared and visible spectra.
  • 安部正真, 北里宏平
    日本惑星科学会秋季講演会予稿集, 2006 98-78, 2006  
    Before the rendezvous of Hayabusa spacecraft with the asteroid Itokawa, various ground-based observations of the asteroid had been performed and a lot of physical quantities about Itokawa were presumed. We summarize these results and verify how effective these results were for the Hayabusa mission. Furthermore, based on the verification result, it is considered how ground-based observation for the candidate asteroid of the next asteroid exploration mission should be advanced.
  • Kitazato Kouhei, Sasaki Sho, Abe Masanao, Clark Beth, Abe Shinsuke, Ishiguro Masateru, Takagi Yasuhiko, Hiroi Takahiro, Barnouin-Jha Olivier, Nakamura Akiko
    Abstracts for fall meeting of the Japanese Society for Planetary Science, 2006 23-23, 2006  
    The near-infrared spectrometer (NIRS) on the Hayabusa spacecraft obtained spatially resolved reflectance spectra of 25143 Itokawa between September 12 and November 24, 2005. In this study, we had modeled a photometric function of the asteroid surface based on the observed spectral data and have investigated the surface heterogeneity of asteroid Itokawa.

Books and Other Publications

 3

Presentations

 2
  • 吉川真, 柳沢俊史, 安部正真, 池永敏憲, 岩城陽大, 岡田達明, 菊地耕一, 黒崎裕久, 黒田信介, 佐伯孝尚, 嶌生有理, 津田雄一, 西山和孝, 三桝裕也, 浦川聖太郎, 奥村真一郎
    Jan 6, 2023
  • 三桝裕也, 田中智, 臼井寛裕, 安部正真, 橘省吾, 佐藤広幸, 佐伯孝尚, 吉川 真, 中澤暁, 津田雄一
    第23 回宇宙科学シンポジウム, Jan 5, 2023

Research Projects

 9
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