Solar System Exploration for Aqua-planetology

2018 Fiscal Year Annual Research Report

• Project Area: Aqua planetology
• Project/Area Number: 17H06459
• Research Institution: Japan Aerospace EXploration Agency
• Principal Investigator: 臼井 寛裕 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 教授 (60636471)
• Co-Investigator(Kenkyū-buntansha): 荒川 政彦 神戸大学, 理学研究科, 教授 (10222738) ; 中村 智樹 東北大学, 理学研究科, 教授 (20260721) ; 岡田 達明 国立研究開発法人宇宙航空研究開発機構, 宇宙科学研究所, 准教授 (30321566) ; 諸田 智克 名古屋大学, 環境学研究科, 講師 (30415898) ; 渡邊 誠一郎 名古屋大学, 環境学研究科, 教授 (50230967) ; 竝木 則行 国立天文台, RISE月惑星探査検討室, 教授 (50274428)
• Project Period (FY): 2017-06-30 – 2022-03-31
• Keywords: はやぶさ２ / リュウグウ / 火星地下圏

Outline of Annual Research Achievements

本計画研究は、「第1段階（H29・30年度）：はやぶさ2探査での観測データの取得準備、近傍観測」、「第2段階（H31・32年度）：微惑星・水惑星・氷衛星の水・物質循環に関する地球科学データの抽出」、「第3段階（H33年度）：微惑星・水惑星・氷衛星の水・物質循環モデルの構築」からなる。はやぶさ２探査が予定通り進行していることにより、本年度は、小惑星リュウグウのリモートセンシング観測およびそのデータ解析に従事した。得られたリモートセンシングデータから、リュウグウが、小惑星帯に存在した母天体の衝突破壊による破片の再集積で形成されたラブルパイル天体であり、その母天体は水－岩石反応を生じていることが明らかとなった。これらの結果は、査読付き原著論文としてScience誌（Kitazato et al. 2019; Sugita et al. 2019; Watanabe et al. 2019）やAstrophysical Journal Letters誌（Hirabayashi et al. 2019）に掲載されることとなった。

リュウグウの解析に加え、計画班では、将来の火星地下県探査のためのツール開発も行っている。火星には凍土層や水-岩石反応で形成された含水鉱物層が地下に広域的に分布しており、地下圏探査の重要性が示唆されている（Usui et al. 2017 Nature）。我々は、レーダーサウンダー技術を応用し、地下水圏の露出部分であるクレーター壁や渓谷から内部へと続く、地下水圏の水平分布（右図のシンボル部分）を取得する技術を開発した。本技術を火星全域に展開することにより、これまで推察の域を出なかった火星地下水圏マップが作成され、表面地質マップとの対比により、火星表層（大気圏）と内部（水圏）との相互進化解明の鍵を握る地下圏進化への理解へと発展することが期待される。

Current Status of Research Progress

2: Research has progressed on the whole more than it was originally planned.

Reason

はやぶさ2探査が計画通りに進んでいるため、その解析および成果発表とも予定通り進んでいる。

Strategy for Future Research Activity

はやぶさ2探査で獲得したデータ解析の技術や知見を、他の太陽系天体観測へと展開すべく、はやぶさ２に従事していたPDの一部を段階的に、火星および氷衛星の探査データ解析プロジェクトへと移行していく。

Research Products

• [Journal Article] Shape of (101955) Bennu indicative of a rubble pile with internal stiffness (2019)
  • Author(s): Barnouin O. S.、The OSIRIS-REx Team、Daly M. G.、Palmer E. E.、Gaskell R. W.、Weirich J. R.、Johnson C. L.、Al Asad M. M.、Roberts J. H.、Perry M. E.、Susorney H. C. M.、Daly R. T.、Bierhaus E. B.、Seabrook J. A.、Espiritu R. C.、Nair A. H.、Nguyen L.、Neumann G. A.、Ernst C. M.、Boynton W. V.、Watanabe S.-i.
  • Journal Title: Nature Geoscience Volume: 12 Pages: 247～252
  • DOI: 10.1038/s41561-019-0330-x
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hayabusa2 arrives at the carbonaceous asteroid 162173 Ryugu?A spinning top?shaped rubble pile (2019)
  • Author(s): S. Watanabe, R. Noguchi, Y. Shimaki, T. Nakamura, T. Morota, N. Sakatani, H. Miyamoto, T. Okada, N. Namiki, M. Arakawa, M. Matsuoka, et al.
  • Journal Title: Science Volume: 364 Pages: 268-272
  • DOI: 10.1126/science.aav8032
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The geomorphology, color, and thermal properties of Ryugu: Implications for parent-body processes (2019)
  • Author(s): S. Sugita, T. Morota, N. Sakatani, T. Okada, N. Namiki, M. Matsuoka, H. Miyamoto, T. Nakamura, Y. Shimaki, R. Noguchi, S. Watanabe, et al.
  • Journal Title: Science Volume: 364 Pages: ー
  • DOI: 10.1126/science.aaw0422
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy (2019)
  • Author(s): K. Kitazato, T. Nakamura, M. Matsuoka, N. Sakatani, T. Okada, T. Morota, Y. Shimaki, S. Watanabe, et al.
  • Journal Title: Science Volume: 364 Pages: 272-275
  • DOI: 10.1126/science.aav7432
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Western Bulge of 162173 Ryugu Formed as a Result of a Rotationally Driven Deformation Process (2019)
  • Author(s): Masatoshi Hirabayashi, Hideaki Miyamoto, Sei-ichiro Watanabe, Tomokatsu Morota, Naoya Sakatani, Moe Matsuoka, et al.
  • Journal Title: The Astrophysical Journal Letters Volume: 874 Pages: -
  • DOI: 10.3847/2041-8213/ab0e8b
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] はやぶさ２搭載光学航法機器の信頼性評価 - リソース制約を満たす高信頼性システムの軌道上実証 (2019)
  • Author(s): 檜原弘樹, 佐野淳平, 益田哲也, 大嶽久志, 岡田達明, 尾川順子, 津田雄一
  • Journal Title: 信学技報 Volume: 118 Pages: 77-82
  • DOI: ISSN 2432-6380
  • Peer Reviewed
• [Journal Article] Hayabusa2 Sample return and kinetic impact mission to near-earth asteroid Ryugu (2019)
  • Author(s): Yuichi Tsuda, Makoto Yoshikawa, Takanao Saiki, Satoru Nakazawa, Sei-ichiro Watanabe
  • Journal Title: Acta Astronautica Volume: 156 Pages: 387-393
  • DOI: 10.1016/j.actaastro.2018.01.030
  • Peer Reviewed
• [Journal Article] Shift from magmatic to phreatomagmatic explosions controlled by the lateral evolution of a feeder dike in the Suoana-Kazahaya eruption, Miyakejima Volcano, Japan (2019)
  • Author(s): Geshi Nobuo、Nemeth Karoly、Noguchi Rina、Oikawa Teruki
  • Journal Title: Earth and Planetary Science Letters Volume: 511 Pages: 177-189
  • DOI: 10.1016/j.epsl.2019.01.038
• [Journal Article] Thermal conductivity and coordination number of compressed dust aggregates (2019)
  • Author(s): S. Arakawa, M. Tatsuuma, N. Sakatani, T. Nakamoto
  • Journal Title: Icarus Volume: 324 Pages: 8-14
  • DOI: 10.1016/j.icarus.2019.01.022
  • Peer Reviewed
• [Journal Article] The potential science and engineering value of samples delivered to Earth by Mars sample return (2019)
  • Author(s): Tosca,NJ., Usui,T., International MSR Objectives and Samples Team (iMOST)
  • Journal Title: Meteoritics & Planetary Science Volume: 54 Pages: 667-671
  • DOI: 10.1111/maps.13232
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] What Geology and Mineralogy Tell Us About Water on Mars (2019)
  • Author(s): Usui Tomohiro
  • Journal Title: Astrobiology Volume: - Pages: 345-352
  • DOI: 10.1007/978-981-13-3639-3_21
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The potential science and engineering value of samples delivered to Earth by Mars sample return (2019)
  • Author(s): Beaty D., Usui, T. et al.
  • Journal Title: Meteoritics & Planetary Science Volume: 54 Pages: S3-S152
  • DOI: 10.1111/maps.13242
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hydrogen Reservoirs in Mars as Revealed by Martian Meteorites (2019)
  • Author(s): Usui Tomohiro
  • Journal Title: Volatiles In The Martian Crust Volume: - Pages: 71-88
  • DOI: 10.1016/B978-0-12-804191-8.00004-0
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Hayabusa2-Ryugu proximity operation planning and landing site selection (2018)
  • Author(s): Yamaguchi, Tomohiro ; Saiki, Takanao ; Tanaka, Satoshi ; Takei, Yuto ; Okada, Tatsuaki ; Takahashi, Tadateru ; Tsuda, Yuichi
  • Journal Title: Acta Astronautica Volume: 151 Pages: 217-227
  • DOI: 10.1016/j.actaastro.2018.05.032
  • Peer Reviewed
• [Journal Article] Science exploration and instrumentation of the OKEANOS mission to a Jupiter Trojan asteroid using the solar power sail (2018)
  • Author(s): Okada, Tatsuaki ; Kebukawa, Yoko ; Aoki, Jun ; Matsumoto, Jun ; Yano, Hajime ; Iwata, Takahiro ; Mori, Osamu ; Bibring, Jean-Pierre ; Ulamec, Stephan ; Jaumann, Ralf ; Solar Power Sail Sci Team
  • Journal Title: Planetary and Space Science Volume: 161 Pages: 99-106
  • DOI: 10.1016/j.pss.2018.06.020
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Earth and moon observations by thermal infrared imager on Hayabusa2 and the application to detectability of asteroid 162173 Ryugu (2018)
  • Author(s): Okada, Tatsuaki ; Fukuhara, Tetsuya ; Tanaka, Satoshi ; Taguchi, Makoto ; Arai, Takehiko ; Senshu, Hiroki ; Demura, Hirohide ; Ogawa, Yoshiko ; Kouyama, Toru ; Sakatani, Naoya ; Takita, Jun ; Sekiguchi, Tomohiko ; Helbert, Jorn ; Mueller, Thomas G. ; Hagermann, Axel ; Hayabusa2 TIR Team
  • Journal Title: Planetary and Space Science Volume: 158 Pages: 46-52
  • DOI: 10.1016/j.pss.2018.05.007
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Asteroid Ryugu before the Hayabusa2 encounter (2018)
  • Author(s): Koji Wada, Hideaki Miyamoto, Tatsuaki Okada, Naoya Sakatani, et al.
  • Journal Title: Progress in Earth and Planetary Science Volume: 5 Pages: -
  • DOI: 10.1186/s40645-018-0237-y
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Thermal conductivity of lunar regolith simulant JSC-1A under vacuum (2018)
  • Author(s): Sakatani, N., Ogawa, K., Arakawa, M., and Tanaka, S.
  • Journal Title: Icarus Volume: 309 Pages: 13-24
  • DOI: 10.1016/j.icarus.2018.02.027
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Classification of volcanic ash particles using a convolutional neural network and probability (2018)
  • Author(s): Shoji Daigo、Noguchi Rina、Otsuki Shizuka、Hino Hideitsu
  • Journal Title: Scientific Reports Volume: 8 Pages: -
  • DOI: 10.1038/s41598-018-26200-2
• [Journal Article] The origin of the unique achondrite NWA 6704: Constraints from petrology, chemistry and Re?Os, O and Ti isotope systematics. (2018)
  • Author(s): Hibiya Y., Archer G. J, Tanaka R., Sanborn M. E., Sato Y., Iizuka T., Ozawa K., Walker R. J., Yamaguchi A., Irving A. J., Yin Q., Nakamura T., Irving A. J.
  • Journal Title: Geochimica Cosmochimica Acta Volume: 245 Pages: 597-627
  • DOI: 10.1016/j.gca.2018.04.031
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Flyby missions to comets and return sample analysis. (2018)
  • Author(s): Brownlee D. E., Clark III B. C., A’Hearn M. F., Sunshine J., Nakamura T.
  • Journal Title: Element Volume: 14 Pages: 87-93
  • DOI: 10.2138/gselements.14.2.87
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Dust Phenomena Relating to Airless Bodies (2018)
  • Author(s): Szalay J. R., PoppeA. R., Agarwal J., Britt D., Belskaya I., Horanyi M., Nakamura T., Sachse M., Spahn F.
  • Journal Title: Space Science Reviews Volume: 214 Pages: -
  • DOI: 10.1007/s11214-018-0527-0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Thermal and impact histories of 25143 Itokawa recorded in Hayabusa particles. (2018)
  • Author(s): Terada K., Sano Y., Takahata N., Ishida A., Tsuchiyama A., Nakamura T., Noguchi T., Karouji Y., Uesugi M., Yada T., Nakabayashi M., Kamioka M., Fukuda K. and Nagahara H.
  • Journal Title: Scientific Reports Volume: 8 Pages: -
  • DOI: 10.1038/s41598-018-30192-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Heating experiments of the Tagish Lake meteorite: investigation of the effects of short-term heating on chondritic organics. (2018)
  • Author(s): Chan Q. H. S., Nakato A., Kebukawa Y., Zolensky M. E., Nakamura T., Maisano J. A., Colbert M. W., Martinez J. E., Kilcoyne A. L. D., Suga H., Takahashi Y., Takeichi Y. and Mase K.
  • Journal Title: Meteoritics and Planetary Science Volume: 54 Pages: 104-125
  • DOI: 10.1111/maps.13193
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Nebular history of an ultrarefractory phase bearing CAI from the reduced type CV chondrite. (2018)
  • Author(s): Yoshizaki T., Nakashima D., Nakamura T., Park C., Sakamoto N., Ishida H., Itoh S.
  • Journal Title: Geochimica et Cosmochimica Acta Volume: 252 Pages: 39-60
  • DOI: 10.1016/j.gca.2019.02.034
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Experimental approach to rootless eruptions using kitchen materials (2018)
  • Author(s): Noguchi Rina、Hamada Ai、Suzuki Ayako I.、Kurita Kei
  • Journal Title: Earth, Planets and Space Volume: 70 Pages: -
  • DOI: 10.1186/s40623-018-0974-6
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 火星地下圏探査の科学的意義および戦略 (2018)
  • Author(s): 臼井 寛裕
  • Journal Title: 日本惑星科学会誌遊星人 Volume: 27 Pages: 296-301
  • DOI: 10.14909/yuseijin.27.4_296
  • Peer Reviewed
• [Journal Article] 火星生命探査のための生命探査顕微鏡の開発 (2018)
  • Author(s): 吉村 義隆、長沼 毅、三田 肇、藤田 和央、臼井 寛裕、山岸 明彦、佐藤 毅彦、宮川 厚夫、今井 栄一、佐々木 聰、小林 憲正、癸生川 陽子、薮田 ひかる
  • Journal Title: 日本惑星科学会誌遊星人 Volume: 27 Pages: 147-151
  • DOI: 10.14909/yuseijin.27.3_147
  • Peer Reviewed
• [Journal Article] 太陽系ハビタブル惑星の成立を探る火星衛星探査計画MMX (2018)
  • Author(s): 倉本 圭、諸田 智克、長岡 央、中川 広務、中村 智樹、小川 和律、大嶽 久志、尾崎 正伸、佐々木 晶、千秋 博紀、橘 省吾、川勝 康弘、寺田 直樹、臼井 寛裕、和田 浩二、渡邊 誠一郎、MMX study team、藤本 正樹、玄田 英典、平田 成、今村 剛、亀田 真吾、松本 晃治、宮本 英昭
  • Journal Title: 日本惑星科学会誌遊星人 Volume: 27 Pages: 207-215
  • DOI: 10.14909/yuseijin.27.3_207
  • Peer Reviewed
• [Journal Article] Water and Volatile Inventories of Mercury, Venus, the Moon, and Mars (2018)
  • Author(s): Greenwood James P.、Karato Shun-ichiro、Vander Kaaden Kathleen E.、Pahlevan Kaveh、Usui Tomohiro
  • Journal Title: Space Science Reviews Volume: 214 Pages: 92
  • DOI: 10.1007/s11214-018-0526-1
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Subduction and atmospheric escape of Earth's seawater constrained by hydrogen isotopes (2018)
  • Author(s): Kurokawa Hiroyuki、Foriel Julien、Laneuville Matthieu、Houser Christine、Usui Tomohiro
  • Journal Title: Earth and Planetary Science Letters Volume: 497 Pages: 149-160
  • DOI: 10.1016/j.epsl.2018.06.016
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] LDM (Life Detection Microscope): In Situ Imaging of Living Cells on Surface of Mars (2018)
  • Author(s): YAMAGISHI Akihiko、SATOH Takehiko、MIYAKAWA Atsuo、YOSHIMURA Yoshitaka、SASAKI Satoshi、KOBAYASHI Kensei、KEBUKAWA Yoko、YABUTA Hikaru、MITA Hajime、IMAI Eiichi、NAGANUMA Takeshi、FUJITA Kazuhisa、USUI Tomohiro
  • Journal Title: TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Volume: 16 Pages: 299-305
  • DOI: 10.2322/tastj.16.299
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] 火星研究における「火星隕石」の役割：これまでの貢献と将来の展望 (2018)
  • Author(s): 小池 みずほ、森脇 涼太、臼井 寛裕
  • Journal Title: 日本惑星科学会誌遊星人 Volume: 27 Pages: 180-189
  • DOI: 10.14909/yuseijin.27.3_180
  • Peer Reviewed / Int'l Joint Research
• [Presentation] Infrared spectra of asteroid Ryugu: Comparison to laboratory-measured carbonaceous chondrites. (2019)
  • Author(s): Matsuoka, M., Nakamura, T., et al.
  • Organizer: 50th Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Possible interpretations of visible/near-infrared spectra of asteroid Ryugu obtained by the Hayabusa2 mission. (2019)
  • Author(s): Nakamura, T., Matsuoka, M., Morota, T., Sakatani, H., Watanabe,S., et al.
  • Organizer: 50th Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] The first global thermal images of asteroid 162173 Ryugu by Hayabusa2 (2019)
  • Author(s): T. Okada, T. Fukuhara, S. Tanaka, M. Taguchi, T. Arai, H. Senshu, N. Sakatani, Y. Shimaki, H. Demura, Y. Ogawa, K. Suko, T. Sekiguchi, T. Kouyam, J. Takita, T. Matsunaga, T. Imamura, T. Wada, S. Hasegawa, J. Helbert, T.G. Mueller, A. Hagermann, J. Biele, M. Grott, M. Hamm, M. Delbo
  • Organizer: 3rd Thermal Models for Planetary Science (TherMoPS III)
  • Int'l Joint Research
• [Presentation] High-resolved thermographic observation of craters and boulders on Ryugu (2019)
  • Author(s): N. Sakatani, S. Tanaka, T. Okada, H. Senshu, Y. Shimaki, T. Morota, M. Matsuoka, et al.
  • Organizer: 3rd Thermal Models for Planetary Science (TherMoPS III)
  • Int'l Joint Research
• [Presentation] Global thermal inertia and surface roughness of asteroid Ryugu by TIR on Hayabusa2 (2019)
  • Author(s): Y. Shimaki, H. Senshu, N. Sakatani, T. Okada, T. Fukuhara, S. Tanaka, T. Arai, H. Demura, K. Suko
  • Organizer: 3rd Thermal Models for Planetary Science (TherMoPS III)
  • Int'l Joint Research
• [Presentation] The Moon as flux calibrator for TIR measurements of Ryugu during the Hayabusa2 approach phase in June 2018 (2019)
  • Author(s): T. Mueller, M. Burgdorf, T. Okada, T. Sekiguchi, T. Fukuhara, S. Tanaka, N. Sakatani, Y. Shimaki, T. Arai, H. Demura, H. Senshu, T. Kouyama
  • Organizer: 3rd Thermal Models for Planetary Science (TherMoPS III)
  • Int'l Joint Research
• [Presentation] HIGH POROSITY NATURE OF THE TOP-SHAPE C-TYPE ASTEROID 162173 RYUGU AS OBSERVED BY HAYABUSA2 (2019)
  • Author(s): S. Watanabe, R. Noguchi, Y. Shimaki, T. Nakamura, T. Morota, N. Sakatani, H. Miyamoto, T. Okada, N. Namiki, M. Matsuoka, et al. et al.
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research / Invited
• [Presentation] IN-SITU DETERMINATION OF THERMAL INERTIA ON NEAR EARTH ASTEROID (162173) RYUGU USING MARA - THE MASCOT RADIOMETER (2019)
  • Author(s): M. Grott, T. Okada, N. Sakatani, et al.
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] OKEANOS - A Solar Power Sail Mission to a Jupiter Trojan Asteroid and Its Updated Science Mission Pro-posal (2019)
  • Author(s): T. Okada, et al.
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] THERMAL IMAGING OF C-TYPE NEAR EARTH ASTEROID 162173 RYUGU BY THERMAL INFRARED IMAGER TIR ON HAYABUSA2 (2019)
  • Author(s): T. Okada, N. Sakatani, Y. Shimaki, S. Watanabe, et al.
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] Thermal Conductivity and Porosity of Ryugu’s Boulders from In-Situ Measurements of MARA - the MASCOT Radiometer (2019)
  • Author(s): M. Hamm, M. Grott, J. Knollenberg, H. Miyamoto, J. Biele, A. Hagermann, N. Muller, W. Neumann, K. Ogawa, T. Okada, K. Otto, N. Sakatani, H. Senshu, M. Zolensky
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] SURFACE ROUGHNESS AND THERMAL INERTIA OF ASTEROID RYUGU INFERRED FROM TIR ON HAYABUSA2 (2019)
  • Author(s): Y. Shimaki, H. Senshu, N. Sakatani, T. Fukuhara, S. Tanaka, T. Arai, H. Demura, K. Suko, T. Okada
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] SURFACE PHYSICAL CONDITION OF ASTEORID RYUGU USING CLOSE-UP OPTICAL AND THERMAL IMAGES (2019)
  • Author(s): N. Sakatani, T. Morota, M. Matsuoka, T. Okada, Y. Shimaki, et al.
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] TIR DATA PROCESSING BY HEAT DURING RENDEZVOUS OF HAYABUSA2 WITH THE ASTEROID (162173) RYUGU (2019)
  • Author(s): K. Suko, T. Kobayashi, H. Demura, Y. Ogawa, T. Arai, N. Sakatani, T. Okada, S. Tanaka, T. Fukuhara
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] LANDING SITE SELECTION FOR HAYABUSA2: SCIENTIFIC EVALUATION OF THE CANDIDATE SITES ON ASTEROID (162173) RYUGU (2019)
  • Author(s): H. Yabuta, S. Watanabe, T. Nakamura, T. Okada, T. Morota, N. Sakatani, M. Matsuoka, R. Noguchi, Y. Shimaki, et al.
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] HAYABUSA2 MISSION UP TO NOW (2019)
  • Author(s): Y.Tsuda, M. Yoshikawa, S. Watanabe, S. Nakazawa, F. Terui, T. Saiki, T.-M. Ho, A. MoussiSoffys, S. Sugita, N. Namiki, K. Kitazato, S. Tanaka, M. Arakawa, S. Tachibana, M. Ishiguro, H. Ikeda, T. Okada, H. Demura, M. Abe, K. Fujita, Y. Yamamoto, R. Jaumann, J.-P. Bibring, M. Grott, K.-H. Glassmeier, et al.
  • Organizer: 50th Lunar and Planetary Science Conference (LPSC2019)
  • Int'l Joint Research
• [Presentation] OKEANOSの科学ミッション：クルーズ中の観測および木星トロヤ群小惑星の探査 (2019)
  • Author(s): 岡田達明, 岩田隆浩, 松浦周二, 津村耕司, 米徳大輔, 三原建弘, 矢野創, 平井隆之, 松岡彩子, 野村麗子, 癸生川陽子, 伊藤元雄, 青木順, 河井洋輔, 横田勝一郎, 寺田健太郎, 豊田岐聡, 圦本尚義, 齋藤義文, 松本純, 佐藤泰貴, 大木優介, 久保勇貴, 渡邉元樹, 吉田二美, 中村良介, 吉川真, 中条俊大, 森治, 加藤秀樹, 川口淳一郎 他
  • Organizer: 第19回宇宙科学シンポジウム
• [Presentation] キッチンからせまるルートレス噴火 (2019)
  • Author(s): 野口里奈 他
  • Organizer: 水蒸気噴火のメカニズムと予知に関する研究集会
• [Presentation] Subsurface structure of Coprates Chasma (2019)
  • Author(s): Noguchi.R.
  • Organizer: Symposium on Planetary Science 2019
  • Int'l Joint Research / Invited
• [Presentation] First detection of subsurface reflectors in Coprates Chasma (2019)
  • Author(s): Noguchi.R., Usui.T.
  • Organizer: The 50th Lunar and Planetary Science Conference
  • Int'l Joint Research
• [Presentation] Global thermal inertia and surface roughness of asteroid Ryugu by TIR on Hayabusa2 (2019)
  • Author(s): Shimaki, Y., Okada, T., et al.
  • Organizer: 第１回水惑星学国際ワークショップ
  • Int'l Joint Research
• [Presentation] Spectral comparison between asteroid (162173) Ryugu and carbonaceous meteorites. (2018)
  • Author(s): Matsuoka, M., Nakamura, T., Hiroi, T., Kitazato, K., Iwata, T., Abe, M., Amano, K.; Kobayashi, S.; Osawa, T.; Ohtake, M.; Matsuura, S.; Arai, T.; Nakauchi, Y.; Senshu, H.
  • Organizer: AAS/Division for Planetary Sciences Meeting
  • Int'l Joint Research
• [Presentation] Interpretation of infrared spectra of asteroid Ryugu based on comparison to carbonaceous chondrites and other meteorites. (2018)
  • Author(s): Matsuoka, M., Nakamura, T., et al.
  • Organizer: AGU Fall Meeting
  • Int'l Joint Research
• [Presentation] Infrared spectra of asteroid 162173 Ryugu obtained by Near-infrared Spectrometer (NIRS3). (2018)
  • Author(s): Matsuoka, M.
  • Organizer: Hayabusa 2018 Symposium
  • Int'l Joint Research / Invited
• [Presentation] OKEANOS - the Solar Power Sail Mission for Science exploration of Jupiter Trojan Asteroid by Rendezvous and Landing (2018)
  • Author(s): Okada, T. et al.
  • Organizer: Japan Geoscience Uinion (JpGU2018)
  • Int'l Joint Research
• [Presentation] Observation Plans of Thermal Infrared Imager TIR onboard Hayabusa2 during the Asteroid Proximity Phase (2018)
  • Author(s): Okada,T., Sakatani,N., Shimaki, Y., et al.
  • Organizer: Japan Geoscience Uinion (JpGU2018)
  • Int'l Joint Research
• [Presentation] Mission Status of Hayabus2 - Final Approach to Asteroid Ryugu (2018)
  • Author(s): Makoto Yoshikawa, Sei-Ichiro Watanabe, Satoshi Tanaka, Seiji Sugita, Noriyuki Namiki, Kohei Kitazato, Takahiro Iwata, Tatsuaki Okada, Masahiko Arakawa, Shogo Tachibana, Masateru Ishiguro, Hitoshi Ikeda, Masanao Abe, Yukio Yamamoto, Yoshiaki Ishihara, Yuichi Tsuda
  • Organizer: Asia-Oceania Geosciences Society Meeting (AOGS 2018)
  • Int'l Joint Research / Invited
• [Presentation] OKEANOS - The Solar Power Sail Mission to Jupiter Trojan Asteroid (2018)
  • Author(s): Tatsuaki Okada, Takahiro Iwata, Jun Matsumoto, Yoko Kebukawa, Motoo Ito, Jun Aoki, Hajime Yano, Makoto Yoshikawa, Toshihiro Chujo, Osamu Mori
  • Organizer: Asia-Oceania Geosciences Society Meeting (AOGS 2018)
  • Int'l Joint Research
• [Presentation] OKEANOS - JUPITER TROJAN ASTEROID RENDEZVOUS AND LANDING MISSION USING THE SOLAR POWER SAIL (2018)
  • Author(s): Okada, T. et al.
  • Organizer: 42th COSPAR Scientific Assembly 2018
  • Int'l Joint Research / Invited
• [Presentation] OSIRS-REx@Bennu and Hayabusa2@Ryugu: thermal modelling of sample return mission target asteroids (2018)
  • Author(s): Delbo, Marco ; Walsh, Kevin ; Okada, Tatsuaki ; Tanaka, Satoshi ; Sakatani, Naoya ; Senshu, Hiroki ; Bibring, Jean-Pierre
  • Organizer: Eurpean Planetary Science Congress
  • Int'l Joint Research / Invited
• [Presentation] Overview of initial remote-sensing observations of asteroid Ryugu by Hayabusa2 (2018)
  • Author(s): M. Yoshikawa, S. Watanabe, M. Fujimoto, S. Tanaka, S. Sugita, K. Kitazato, N. Namiki, K. Okada, H. Ikeda, N. Hirata, N. Sakatani, T. Morota, K. Matsumoto, Y. Ishihara, H. Yabuta, T. Nakamura, Y. Yamamoto, S. Kikuchi, F. Terui, T. Saiki, A. Nakazawa, Y. Tsuda,
  • Organizer: 50th Annual Division for Planetary Sciences Meeting (DPS2018)
  • Int'l Joint Research / Invited
• [Presentation] In-situ investigation of asteroid (162173) Ryugu by the Mobile Asteroid Surface Scout (MASCOT) as part of the Hayabusa 2 Mission (2018)
  • Author(s): R. Jaumann, J.P. Bibring, K.H. Glassmeier, M. Grott, T.M. Ho, S. Ulamec, N. Schmitz, S. Schroeder, K. Otto, C. Krause, U. Auster, D. Hercik, J. Biele, A. Koncz, C. Pilorget, V. Hamm, H. Michaelis, S. Mottola, P. Michel, H. Yano,S. Sugita, H. Kuninaka, T. Okada, M. Yoshikawa, S. Watanabe, M. Fujimoto, H. Yabuta
  • Organizer: 50th Annual Division for Planetary Sciences Meeting (DPS2018)
  • Int'l Joint Research
• [Presentation] Hayabusa2 Landing Site Selection: Scientific Evaluation on Asteroid Ryugu (2018)
  • Author(s): H. Yabuta, S. Watanabe, T. Nakamura, T. Okada, T. Morota, N. Sakatani, M. Matsuoka, et al.
  • Organizer: 50th Annual Division for Planetary Sciences Meeting (DPS2018)
  • Int'l Joint Research
• [Presentation] Thermal Infrared Observations of C-type Asteroid 162173 Ryugu by Hayabsua2 (2018)
  • Author(s): T. Okada, T. Fukuhara, S. Tanaka, M. Taguchi, T. Arai, H. Senshu, N. Sakatani, Y. Shimaki, H. Demura, Y. Ogawa, K. Kitazato, K. Suko, T. Sekiguchi, T. Kouyama, J. Takita, T.
  • Organizer: 50th Annual Division for Planetary Sciences Meeting (DPS2018)
  • Int'l Joint Research
• [Presentation] First Global Thermal Images of Asteroid 162173 Ryugu and Implications to Its Surface Thermal Inertia, Grain Size and Roughness (2018)
  • Author(s): T. Okada, T. Fukuhara, S. Tanaka, M. Taguchi, T. Arai, H. Senshu, N. Sakatani, Y.
  • Organizer: 6th Symposium on Solar System Materials (HAYABUSA2018)
  • Int'l Joint Research / Invited
• [Presentation] Scientific Evaluation on the Asteroid Ryugu in Hayabusa2 Landing Site Selection (2018)
  • Author(s): H. Yabuta, S. Watanabe, T. Nakamura, N. Hirata, S. Sugita, T. Okada, K. Kitazato, Y. Ishihara, T. Morota, N. Sakatani, K. Matsumoto, K. Wada, S. Tachibana, M. Komatsu, E. Tatsumi, M. Matsuoka, C. Honda, T. Hiroi, S. Senshu, R. Honda, S. Kikuchi, S. Tanaka, A. Miura, T. Yamaguchi, Y. Yamamoto, T. Saiki, Y. Tsuda, et al.
  • Organizer: 6th Symposium on Solar System Materials (HAYABUSA2018)
  • Int'l Joint Research / Invited
• [Presentation] Overview of proximity operations at asteroid Ryugu by Hayabusa2 spacecraft (2018)
  • Author(s): Seiichiro Watanabe, Makoto Yoshikawa, Satoshi Tanaka, Seiji Sugita, Kohei Kitazato, Noriyuki Namiki, Tatsuaki Okada, Shogo Tachibana, Ralf Jaumann, J.-P. Bibring, Naru Hirata, Naoyuki Hirata, Hitoshi Ikeda, Yukio Yamamoto, Fuyuto Terui, Takanao Saiki, Satoru Nakazawa, Yuichi Tsuda, Hayabusa2 Joint Science Team,
  • Organizer: AGU Fallmeeting
  • Int'l Joint Research / Invited
• [Presentation] Thermo-physical properties of asteroid 162173 Ryugu by TIR on Hayabusa2 (2018)
  • Author(s): Tatsuaki Okada, Naoya Sakatani, Yuri Shimaki, Seiichiro Watanabe, Hayabusa2 TIR Team
  • Organizer: AGU Fallmeeting
  • Int'l Joint Research
• [Presentation] Surface grain sizes of the touch down sites revealed by proximity imaging by Hayabusa2 (2018)
  • Author(s): Naoya Sakatani, Tomokatsu Morota, Moe Matsuoka, Tatsuaki Okada, Yuri Shimaki, Seiichiro Watanabe, et al.
  • Organizer: AGU Fallmeeting
  • Int'l Joint Research
• [Presentation] Local Thermal Properties of Asteroid Ryugu observed with Thermal Infrared Imager onboard Hayabusa2 (2018)
  • Author(s): Takehiko Arai, Tatsuaki Okada, Naoya Sakatani, Yuri Shimaki, et al.
  • Organizer: AGU Fallmeeting
  • Int'l Joint Research
• [Presentation] Hayabusa2 Landing Site Selection: Scientific Evaluation on Asteroid Ryugu (2018)
  • Author(s): Hikaru Yabuta, Seiichiro Watanabe, Tomoki Nakamura, Tatsuaki Okada, Tomokatsu Morota, Naoya Sakatani, Moe Matsuoka, et al.
  • Organizer: AGU Fallmeeting
  • Int'l Joint Research
• [Presentation] はやぶさ２搭載中間赤外カメラ（TIR）によるRyuguの初期観測 (2018)
  • Author(s): 田中智,岡田達明, 坂谷尚哉, 嶌生有理, 渡邊誠一郎,他
  • Organizer: 2018年日本惑星科学会秋季講演会
• [Presentation] 凸凹表面の熱進化計算－はやぶさ２TIR への応用 (2018)
  • Author(s): 千秋博紀，坂谷尚哉，嶌生有理，マルコ・デルボ，荒井武彦，出村裕英，須古健太郎，田中智，岡田達明
  • Organizer: 2018年日本惑星科学会秋季講演会
• [Presentation] はやぶさ２搭載中間赤外カメラTIRが示す小惑星Ryugu熱慣性の地域多様性 (2018)
  • Author(s): 嶌生有理, 田中智, 福原哲哉, 荒井武彦, 千秋博紀, 坂谷尚哉, 出村裕英, 須古健太郎, 岡田達明
  • Organizer: 2018年日本惑星科学会秋季講演会
• [Presentation] 木星トロヤ群探査OKEANOSの現状 (2018)
  • Author(s): 岡田達明, 岩田隆浩, 中条俊大, 松本純, 癸生川陽子, 青木順, 伊藤元雄, 松岡彩子, 森治, OKEANOS検討チーム
  • Organizer: 2018年日本惑星科学会秋季講演会
• [Presentation] OKEANOSの木星トロヤ群小惑サイエンス (2018)
  • Author(s): 癸生川陽子，岡田達明，伊藤元雄，青木順，河井洋輔，松本純，中条俊大，矢野創，岩田隆浩，森治，OKEANOSサイエンスチーム
  • Organizer: 第62回 宇宙科学技術連合講演会
• [Presentation] 「はやぶさ２」による小惑星リュウグウの熱撮像 (2018)
  • Author(s): 岡田達明, 福原哲哉, 田中智, 田口真, 荒井武彦, 坂谷尚哉, 千秋博紀, 出村裕英, 関口朋彦, 神山徹, 嶌生有理, 渡邊誠一郎，佐伯孝尚, 津田雄一，はやぶさ2TIRチーム,
  • Organizer: 第39回日本熱物性シンポジウム
  • Invited
• [Presentation] はやぶさ２搭載TIRが示すRyugu熱物性 (2018)
  • Author(s): 嶌生有理, 田中智, 福原哲哉, 荒井武彦, 千秋博紀, 坂谷尚哉, 出村裕英, 須古健太郎, 岡田達明
  • Organizer: 平成30年度：天体の衝突物理の解明 (XIV) ～探査機はやぶさの成果と挑戦：初号機から２号機へ～
• [Presentation] はやぶさ2によるリュウグウ観測の概観 (2018)
  • Author(s): 渡邊誠一郎
  • Organizer: 2018年日本惑星科学会秋季講演会
• [Presentation] Experimental study on scaling laws for high-velocity impact phenomena on water ice targets (2018)
  • Author(s): Arakawa, M.
  • Organizer: 9th Workshop on Catastrophic Disruption in the Solar System
  • Int'l Joint Research / Invited
• [Presentation] 高空隙率シリカ層への衝突実験とクレータリングにおける空隙率の効果 (2018)
  • Author(s): 石黒琢也，荒川政彦，保井みなみ
  • Organizer: 日本惑星科学
• [Presentation] 異なる粒径をもつ粒子の混合層へのクレーター形成実験：小惑星Ryugu上のクレーター地形との比較 (2018)
  • Author(s): 保井みなみ，荒川政彦
  • Organizer: 日本惑星科学
• [Presentation] 多孔質天体上に形成する衝突クレーター周囲の衝突残留温度に関する実験的研究 (2018)
  • Author(s): 田澤拓，橋本涼平，小川和律，荒川政彦，保井みなみ
  • Organizer: 日本惑星科学
• [Presentation] 多孔質氷への高速度クレーター形成実験：クレーターサイズスケール則に対する衝突溶融の影響 (2018)
  • Author(s): 宮野加菜，保井みなみ，荒川政彦
  • Organizer: 日本惑星科学
• [Presentation] 多孔質氷の圧縮変形における圧密速度と空隙率の関係：氷微惑星の密度構造への応用 (2018)
  • Author(s): 矢部みなみ，荒川政彦，保井みなみ
  • Organizer: 日本惑星科学
• [Presentation] 多孔質氷球の反発係数の空隙率依存性：土星リング粒子の衝突過程に関する実験的研究 (2018)
  • Author(s): 豊田優佳里，保井みなみ，荒川政彦
  • Organizer: 日本惑星科学
• [Presentation] 低強度粗粒レゴリスを用いた衝突実験：クレータースケール則と衝突励起振動に対する粒子強度の影響 (2018)
  • Author(s): 山本裕也，荒川政彦，保井みなみ
  • Organizer: 日本惑星科学
• [Presentation] 小型搭載型衝突装置と分離カメラを用いたリュウグウ上での宇宙衝突実験 (2018)
  • Author(s): 荒川政彦，はやぶさ2 SCI/DCAM3チーム
  • Organizer: 日本地球惑星科学連合2018年大会
  • Invited
• [Presentation] High-velocity impact experiments on porous gypsum simulating C-type asteroids: In-situ measurements of post shock temperature around impact crater (2018)
  • Author(s): 保井みなみ，橋本涼平，荒川政彦，小川和律
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] フラッシュX線を用いた凍結粘土の衝突破壊過程のその場観察 (2018)
  • Author(s): 岡崎昌志，荒川政彦，保井みなみ
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] Experimental study on crater size scaling law of porous silica layer (2018)
  • Author(s): 石黒琢也，荒川政彦，保井みなみ
  • Organizer: 日本地球惑星科学連合2018年大会
• [Presentation] 多孔質氷天体上への高速度クレーター形成実験：サイズスケール則に対する衝突溶融度の影響 (2018)
  • Author(s): 宮野加菜，保井みなみ，荒川政彦
  • Organizer: 日本地球惑星科学連合2018年大会2018201800
• [Presentation] 多孔質石膏により弱く結合した石英砂ブロックへのクレーター形成実験：弱強度支配域のクレータースケール則 (2018)
  • Author(s): 杉村瞭，石黒琢也，保井みなみ，荒川政彦
  • Organizer: 日本地球惑星科学連合2018年大会2018201800
• [Presentation] 氷微惑星を模擬した氷球の斜め衝突実験 (2018)
  • Author(s): 中村誠人，荒川政彦，保井みなみ
  • Organizer: 日本地球惑星科学連合2018年大会2018201800
• [Presentation] The first recovery of asteroidal samples to the Earth and subsequent two Japanese Sample Return Missions: Hayabusa, Hayabusa2, and MMX missions (2018)
  • Author(s): T. Nakamura
  • Organizer: Astrophysics Colloquium at the Department of Astronomy
  • Int'l Joint Research
• [Presentation] 火星衛星探査計画MMXとそのサイエンス2018 (2018)
  • Author(s): 倉本 圭, 川勝 康弘, 藤本 正樹, 玄田 英典, 平田 成, 今村 剛, 亀田 真吾, 松本 晃治, 宮本 英昭, 諸田 智克, 長岡 央, 中川広務, 中村 智樹, 小川 和律, 大嶽 久志, 尾崎 正伸, 佐々木 晶, 千秋 博紀, 橘 省吾, 寺田 直樹, 臼井 寛裕, 和田 浩二, 渡邊 誠一郎, MMX study team
  • Organizer: 惑星科学会
• [Presentation] 炭素質コンドライト中の糖の探索 (2018)
  • Author(s): 古川善博, 力石嘉人, 大河内直彦, 中村智樹
  • Organizer: 惑星科学会
• [Presentation] Project overview of CAESAR comet sample return mission (2018)
  • Author(s): T. Nakamura et al.
  • Organizer: HY2 Sympojium
  • Int'l Joint Research / Invited
• [Presentation] History of unsuccessful reproduction experiments (including me!) (2018)
  • Author(s): T. Nakamura et al.
  • Organizer: Univ Paris Core2 meeting
  • Int'l Joint Research / Invited
• [Presentation] はやぶさ2 SCI クレータ探索訓練の経過報告 (2018)
  • Author(s): 嶌生有理 他
  • Organizer: JpGU
• [Presentation] Hayabusa2/NIRS3 spectra of Asteroid (162173) Ryugu: Comparison to meteorite analogues and implication for the formation process (2018)
  • Author(s): M. Matsuoka et al.
  • Organizer: DPS
  • Int'l Joint Research
• [Presentation] NEAR-INFRARED SPECTROSCOPY OF ASTEROID RYUGU: RESULTS FROM HAYABUSA2 NIRS3 INSTRUMENT (2018)
  • Author(s): T. Nakamura et al.
  • Organizer: 第二回水惑星会議
• [Presentation] Japanese second sample return mission: Hayabusa2 (2018)
  • Author(s): T. Nakamura
  • Organizer: Asteroid Science Intersections with In-Space Mine Engineering
  • Int'l Joint Research / Invited
• [Presentation] MARTIAN MOONS EXPLORATION (MMX): JAPANESE PHOBOS SAMPLE RETURN MISSION (2018)
  • Author(s): T. Usui et al.
  • Organizer: COSPAR
  • Int'l Joint Research
• [Presentation] Exploration of miniature volcanology using rootless cones as natural analogues of huge volcanoes across Earth and Mars (2018)
  • Author(s): NoguchiR. and K. Kurita
  • Organizer: 7th International Maar Conference
  • Int'l Joint Research
• [Presentation] Analog experiment for rootless eruption (2018)
  • Author(s): NoguchiR.et al.
  • Organizer: 7th International Maar Conference
  • Int'l Joint Research
• [Presentation] ハワイの巨大ルートレスコーンの形成過程検討 (2018)
  • Author(s): 野口里奈 大槻静香 栗田敬
  • Organizer: 日本火山学会 秋季大会
• [Presentation] 火星のCoprates Chasmaの地下構造 (2018)
  • Author(s): 野口里奈、臼井寛裕 他
  • Organizer: 日本惑星科学会 秋季大会
• [Presentation] 超高解像地形モデルを用いた火星溶岩流の静置過程の検討 (2018)
  • Author(s): 野口里奈
  • Organizer: 第62回宇宙科学技術連合講演会
• [Presentation] Extraction of boulder height on asteroid 162173 Ryugu using shape models (2018)
  • Author(s): Noguchi. R.
  • Organizer: The 2nd Joint Meeting of HYB2 Regolith and Multi-scale Science
  • Int'l Joint Research
• [Presentation] Thermal conductivity of lunar regolith simulant and implication to grain size estimate using thermal inertia (2018)
  • Author(s): N. Sakatani, T.Okada, et al.
  • Organizer: 日本地球惑星連合大会
  • Int'l Joint Research
• [Presentation] Searching SCI craters: Results of a Landing Site Selection dry-run (2018)
  • Author(s): Shimaki, Y., Okada, T., et al.
  • Organizer: JpGU2018
  • Int'l Joint Research
• [Presentation] はやぶさ２搭載中間赤外カメラ TIR が示す小惑星 Ryugu 熱物性の地域的多様性 (2018)
  • Author(s): 嶌生有理，岡田達明 他
  • Organizer: 日本惑星科学会 2018 年秋季講演会
• [Presentation] Global thermal inertia and surface roughness of the asteroid Ryugu by TIR on Hayabusa2. (2018)
  • Author(s): Shimaki, Y., Okada, T., et al.
  • Organizer: 2nd IRSG-MS Joint Meeting
  • Int'l Joint Research
• [Presentation] はやぶさ２搭載 TIR が示す Ryugu 熱物性 (2018)
  • Author(s): 嶌生有理，他
  • Organizer: 第 14 回衝突研究会
• [Presentation] Global thermal inertia and surface roughness of asteroid Ryugu by TIR on Hayabusa2 (2018)
  • Author(s): 嶌生有理，岡田達明 他
  • Organizer: 第２回水惑星学全体会議
• [Remarks] Usui Research Group
  • URL: https://planetb.sci.isas.jaxa.jp/aqua/index.html