Faculty Profiles - WATANABE, Sei-ichiro

Papers - WATANABE, Sei-ichiro

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Landing site selection for the Hayabusa2 mission: Pre-arrival training and post-arrival analyses Reviewed

Shota Kikuchi, Tomohiro Yamaguchi, Sei-ichiro Watanabe, Hikaru Yabuta, Koji Wada, Takanao Saiki, Yuto Takei, Satoshi Tanaka, Yuichi Tsuda

Hayabusa2 Asteroid Sample Return Mission page： 189 - 208 2022.4

MASCOT—A Mobile Lander On-board the Hayabusa2 Spacecraft—Operations on Ryugu Reviewed International coauthorship

C. Krause, U. Auster, J. P. Bibring, J. Biele, C. Cenac-Morthe, F. Cordero, B. Cozzoni, C. Dudal, D. Embacher, C. Fantinati, H. H. Fischer, K. H. Glassmeier, D. Granena, M. Grott, J. T. Grundmann, V. Hamm, D. Hercik, T. M. Ho, R. Jaumann, K. Kayal, J. Knollenberg, O. Küchemann, C. Lange, L. Lorda, M. Maibaum, D. May, Y. Mimasu, A. Moussi, T. Okada, J. Reill, T. Saiki, K. Sasaki, M. Schlotterer, N. Schmitz, N. Toth, Y. Tsuda, S. Ulamec, T. Yoshimitsu, S. Watanabe, F. Wolff

Hayabusa2 Asteroid Sample Return Mission page： 559 - 575 2022.4

Language：English Publishing type：Part of collection (book)

MASCOT (‘Mobile Asteroid Surface Scout’) is a 10 kg mobile surface science package part of JAXA’s Hayabusa2 sample return mission. The mission was launched in December 2014 from Tanegashima Space Center, Japan. The Hayabusa2 spacecraft reached the target asteroid in summer 2018. After a mapping phase of the asteroid and a landing site selection process the MASCOT lander was deployed to the surface on the 3rd of October 2018. MASCOT operated successfully for about 17 h on the surface of Ryugu. It performed three relocation manoeuvres and one “Mini-Move” and returned 128 MBytes of data. MASCOT has been developed by the German Aerospace Center (DLR) in cooperation with the Centre National d’Etudes Spatiales (CNES). The main objectives were to perform in-situ investigations of the asteroid surface and to support the sampling site selection for the mother spacecraft. These objectives could be reached successfully. On 6th December 2020 Hayabusa2 successfully returned asteroid samples to the Earth.

DOI： 10.1007/978-3-030-94628-9_25

Scopus

Martian moons exploration MMX: sample return mission to Phobos elucidating formation processes of habitable planets Invited Reviewed International coauthorship Open Access

Kiyoshi Kuramoto, Yasuhiro Kawakatsu, Masaki Fujimoto, Akito Araya, Maria Antonietta Barucci, Hidenori Genda, Naru Hirata, Hitoshi Ikeda, Takeshi Imamura, Jörn Helbert, Shingo Kameda, Masanori Kobayashi, Hiroki Kusano, David J. Lawrence, Koji Matsumoto, Patrick Michel, Hideaki Miyamoto, Tomokatsu Morota, Hiromu Nakagawa, Tomoki Nakamura, Kazunori Ogawa, Hisashi Otake, Masanobu Ozaki, Sara Russell, Sho Sasaki, Hirotaka Sawada, Hiroki Senshu, Shogo Tachibana, Naoki Terada, Stephan Ulamec, Tomohiro Usui, Koji Wada, Sei-ichiro Watanabe, Shoichiro Yokota

Earth, Planets and Space Vol. 74 ( 1 ) 2022.1

Language：English Publishing type：Research paper (scientific journal) Publisher：SPRINGER

Martian moons exploration, MMX, is the new sample return mission planned by the Japan Aerospace Exploration Agency (JAXA) targeting the two Martian moons with the scheduled launch in 2024 and return to the Earth in 2029. The major scientific objectives of this mission are to determine the origin of Phobos and Deimos, to elucidate the early Solar System evolution in terms of volatile delivery across the snow line to the terrestrial planets having habitable surface environments, and to explore the evolutionary processes of both moons and Mars surface environment. To achieve these objectives, during a stay in circum-Martian space over about 3 years MMX will collect samples from Phobos along with close-up observations of this inner moon and carry out multiple flybys of Deimos to make comparative observations of this outer moon. Simultaneously, successive observations of the Martian atmosphere will also be made by utilizing the advantage of quasi-equatorial spacecraft orbits along the moons' orbits.

DOI： 10.1186/s40623-021-01545-7

Open Access

Web of Science

Measurement of surface deformation and cohesion of a granular pile under the effect of centrifugal force Reviewed Open Access

Irie Terunori, Yamaguchi Ryusei, Watanabe Sei-ichiro, Katsuragi Hiroaki

MEASUREMENT SCIENCE AND TECHNOLOGY Vol. 32 ( 12 ) 2021.12

Spectrally blue hydrated parent body of asteroid (162173) Ryugu Reviewed International coauthorship Open Access

Eri Tatsumi, Naoya Sakatani, Lucie Riu, Moe Matsuoka, Rie Honda, Tomokatsu Morota, Shingo Kameda, Tomoki Nakamura, Michael Zolensky, Rosario Brunetto, Takahiro Hiroi, Sho Sasaki, Sei’ichiro Watanabe, Satoshi Tanaka, Jun Takita, Cédric Pilorget, Julia de León, Marcel Popescu, Juan Luis Rizos, Javier Licandro, Ernesto Palomba, Deborah Domingue, Faith Vilas, Humberto Campins, Yuichiro Cho, Kazuo Yoshioka, Hirotaka Sawada, Yasuhiro Yokota, Masahiko Hayakawa, Manabu Yamada, Toru Kouyama, Hidehiko Suzuki, Chikatoshi Honda, Kazunori Ogawa, Kohei Kitazato, Naru Hirata, Naoyuki Hirata, Yuichi Tsuda, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Yuto Takei, Hiroshi Takeuchi, Yukio Yamamoto, Tatsuaki Okada, Yuri Shimaki, Kei Shirai, Seiji Sugita

Nature Communications Vol. 12 ( 1 ) 2021.10

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal) Publisher：Springer Science and Business Media LLC

<title>Abstract</title>Ryugu is a carbonaceous rubble-pile asteroid visited by the Hayabusa2 spacecraft. Small rubble pile asteroids record the thermal evolution of their much larger parent bodies. However, recent space weathering and/or solar heating create ambiguities between the uppermost layer observable by remote-sensing and the pristine material from the parent body. Hayabusa2 remote-sensing observations find that on the asteroid (162173) Ryugu both north and south pole regions preserve the material least processed by space weathering, which is spectrally blue carbonaceous chondritic material with a 0–3% deep 0.7-µm band absorption, indicative of Fe-bearing phyllosilicates. Here we report that spectrally blue Ryugu’s parent body experienced intensive aqueous alteration and subsequent thermal metamorphism at 570–670 K (300–400 °C), suggesting that Ryugu’s parent body was heated by radioactive decay of short-lived radionuclides possibly because of its early formation 2–2.5 Ma. The samples being brought to Earth by Hayabusa2 will give us our first insights into this epoch in solar system history.

DOI： 10.1038/s41467-021-26071-8

Open Access

Web of Science

Other Link： https://www.nature.com/articles/s41467-021-26071-8

Magma source transition of lunar mare volcanism at 2.3 Ga Reviewed Open Access

S. Kato, T. Morota, Y. Yamaguchi, S. Watanabe, H. Otake, M. Ohtake

Meteoritics & Planetary Science 2017.6

Dust ring formation due to sublimation of dust grains: An analytical model Reviewed

H. Kobayashi, S. Watanabe, H. Kimura, T. Yamamoto

Icarus Vol. 201 ( 1 ) page： 395-405 2009.5

Dust ring formation due to ice sublimation of radially drifting dust particles under the Poynting-Robertson effect in debris disks Reviewed

Kobayashi, H., Watanabe S., Kimura, H., and Yamamoto T.

Icarus Vol. 195 ( 2 ) page： 871-881 2008.6

Analytic Model of Upper Tropospheric Clouds in Tropical Hadley Cell Reviewed

Kyoko K. Tanaka, Tetsuo Yamamoto, Sei-ichiro Watanabe, and Kensuke Nakajima

Earth Planets Space Vol. 60 ( 3 ) page： 219-228 2008.3

Authorship：Corresponding author Language：English Publishing type：Research paper (scientific journal)

We develop a two-dimensional analytic model that describes the behavior of upper tropospheric clouds in the tropical Hadley cell. The behavior of model is characterized by two dimensionless parameters: one is proportional to the temperature lapse rate, and the other is relevant to the initial altitude of the cloud particles. We derive analytic expressions for the motion and evaporation of the cloud particles and calculate various cloud properties such as the cloudiness and the column water content. We find the outflow from the convective regions spreads out and generates a cirrus layer whose converge has a maximum at the tropopause: the cloudiness is as large as 0.5 to 1 in the vicinity of the tropopause for small cloud particles of their radii less than 5 micron.

Co-accretion of the Earth-Moon system after the giant impact Reviewed

Icarus Vol. 168 page： 60 - 79 2004

Gas accretion flows onto giant protoplanets: High-resolution two-dimensional simulations Reviewed

The Astrophysical Journal Vol. 580 page： 506 - 518 2002

Hugoniot equation of state of basalt Reviewed

Planetary Space Science Vol. 45 ( 11 ) page： 1489 1997

Collision and Tidal Interaction between Planetesimals. Reviewed

Watanabe, S., Miyama, S. M.

The Astrophysical Journal Vol. 391 page： 318-335 1992.5

Cooling and Quasi-Static Contraction of the Primitive Solar Nebula after Gas Accretion Reviewed

Watanabe, S., Nakagawa, Y., Nakazawa, K.

The Astrophysical Journal Vol. 358 page： 282 - 292 1990.7

Cooling of the Solar Nebula Reviewed

Watanabe S. Nakagawa, Y.

Progress of Theoretical Physics Supplement Vol. 96 page： 130-140 1988.12

Methylene‐to‐methyl ratio variability in Ryugu samples: Clues to a heterogeneous aqueous alteration Reviewed International coauthorship International journal

Zélia Dionnet, Zahia Djouadi, Lukas Delaye, Lucas Caron, Rosario Brunetto, Alice Aléon‐Toppani, Cateline Lantz, Stefano Rubino, Donia Baklouti, Tomoki Nakamura, Ferenc Borondics, Christophe Sandt, Megumi Matsumoto, Kana Amano, Tomoyo Morita, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Shogo Tachibana, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Fuyuto Terui, Satoru Nakazawa, Seiichiro Watanabe, Yuichi Tsuda

Meteoritics & Planetary Science Vol. 60 ( 2 ) page： 273 - 285 2024.12

Language：English Publishing type：Research paper (scientific journal) Publisher：Wiley

Abstract

Understanding the processes of aqueous alteration within primitive bodies is crucial for unraveling the complex history of early planetesimals. To better identify the signs of this process and its consequences, we have studied the heterogeneity at a micrometric scale of the structure of the aliphatic organic compounds and its relationship to its mineralogical environment. Here, we report an analysis performed on two micrometric grains of Ryugu (C0002‐FC027 and C0002‐FC028). The samples were crushed in a diamond compression cell and analyzed using high‐spatial resolution Fourier Transform InfraRed (FT‐IR) hyperspectral imaging measurements conducted in transmission mode. We showed here the spatial distributions of the main components and the structural heterogeneity of the aliphatic organic matter highlighting a micrometer‐scale variability in the methylene‐to‐methyl ratio. Moreover, we connected this heterogeneity to the one of the phyllosilicate band positions. Our findings indicate that the organic matter within Ryugu's micrometric grains underwent varying degrees of aqueous alteration in distinct microenvironments resulting in an elongation of the length of their aliphatic chains, and/or a reduction in their branching and/or cross‐linking.

DOI： 10.1111/maps.14304

Microscopic slickenside as a record of weak shock metamorphism in the surface layer of asteroid Ryugu Reviewed International coauthorship International journal

Miyahara, M; Noguchi, T; Matsumoto, T; Tomioka, N; Miyake, A; Igami, Y; Seto, Y; Haruta, M; Saito, H; Hata, S; Ishii, HA; Bradley, JP; Ohtaki, KK; Dobrica, E; Leroux, H; Le Guillou, C; Jacob, D; de la Peña, F; Laforet, S; Mouloud, BE; Marinova, M; Langenhorst, F; Harries, D; Beck, P; Phan, THV; Rebois, R; Abreu, NM; Gray, J; Zega, T; Zanetta, PM; Thompson, MS; Stroud, R; Burgess, K; Cymes, BA; Bridges, JC; Hicks, L; Lee, MR; Daly, L; Bland, PA; Zolensky, ME; Frank, DR; Martinez, J; Tsuchiyama, A; Yasutake, M; Matsuno, J; Okumura, S; Mitsukawa, I; Uesugi, K; Uesugi, M; Takeuchi, A; Sun, M; Enju, S; Takigawa, A; Michikami, T; Nakamura, T; Matsumoto, M; Nakauchi, Y; Abe, M; Nakazawa, S; Okada, T; Saiki, T; Tanaka, S; Terui, F; Yoshikawa, M; Miyazaki, A; Nakato, A; Nishimura, M; Usui, T; Yada, T; Yurimoto, H; Nagashima, K; Kawasaki, N; Sakamotoa, N; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Watanabe, S; Tsuda, Y

METEORITICS & PLANETARY SCIENCE Vol. 59 ( 12 ) page： 3181 - 3192 2024.12

Correlated IR-SEM-TEM studies of three different grains from Ryugu: from the initial material to post-accretional processes. Reviewed International coauthorship International journal Open Access

Aléon-Toppani, A; Brunetto, R; Dionnet, Z; Rubino, S; Baklouti, D; Brisset, F; Vallet, M; Heripre, E; Nakamura, T; Lantz, C; Djouadi, Z; Borondics, F; Sandt, C; Troadec, D; Mivumbi, O; Matsumoto, M; Amano, K; Morita, T; Yurimoto, H; Noguchi, T; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Yada, T; Nishimura, M; Nakato, A; Miyazaki, A; Yogata, K; Abe, M; Okada, T; Usui, T; Yoshikawa, M; Saiki, T; Tanaka, S; Terui, F; Nakazawa, S; Watanabe, S; Tsuda, Y

METEORITICS & PLANETARY SCIENCE Vol. 59 page： A5 - A5 2024.8

SPATIAL HETEROGENEITY OF ALIPHATIC COMPOUNDS AND THEIR LINK WITH PHYLLOSILICATES AS A RESULT OF AQUEOUS ALTERATION OF RYUGU SAMPLES. International coauthorship International journal

Dionnet, Z; Djouadi, Z; Brunetto, R; Aléon-Toppani, A; Nakamura, T; Rubino, S; Delaye, L; Caron, L; Baklouti, D; Lantz, C; Mivumbi, O; Borondics, F; Héripré, E; Troadec, D; Tsuchiyama, A; Matsuno, J; Matsumoto, M; Morita, T; Kikuiri, M; Amano, K; Kagawa, E; Yurimoto, H; Noguchi, T; Okazaki, R; Yabuta, H; Naraoka, H; Sakamoto, K; Tachibana, S; Watanabe, S; Tsuda, Y

METEORITICS & PLANETARY SCIENCE Vol. 59 page： A99 - A99 2024.8

Simultaneous geometric calibration and orbit-attitude determination of Hayabusa2’s deployable camera (DCAM3) Reviewed International coauthorship International journal Open Access

Shota Kikuchi, Kei Shirai, Ko Ishibashi, Koji Wada, Yasuhiro Yokota, Rie Honda, Toshihiko Kadono, Yuri Shimaki, Naoya Sakatani, Kazunori Ogawa, Hirotaka Sawada, Takanao Saiki, Yuya Mimasu, Yuto Takei, Seiji Sugita, Toru Kouyama, Naru Hirata, Satoru Nakazawa, Makoto Yoshikawa, Satoshi Tanaka, Sei-ichiro Watanabe, Yuichi Tsuda, Masahiko Arakawa

Advances in Space Research Vol. 74 ( 2 ) page： 899 - 936 2024.7

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Papers - WATANABE, Sei-ichiro