Results 71 to 80 of about 1,024 (200)

Small‐scale elemental abundance variations in Ryugu particles from touchdown 1

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 580-599, April 2026.
Abstract Ryugu materials closely resemble CI chondrites' mineralogical, chemical, and isotopic compositions; yet minor but resolvable differences in certain elemental abundances are evident. In this study, the bulk chemical compositions of eight individual Ryugu particles (1.5–4.3 mg) from the first touchdown site (TD1) were determined using triple ...
Karina López García, Tetsuya Yokoyama, Ikshu Gautam, Makiko K. Haba, Tsuyoshi Iizuka, Nao Nakanishi, Ryota Fukai   +6 more
wiley   +1 more source

MASCOT aboard Hayabusa2: Status of Landing Preparations [PDF]

, 2018
MASCOT (’Mobile Asteroid Surface Scout’) is a 10 kg mobile surface science package on-board JAXA’s Hayabusa2 spacecraft, which, by July 2018, will have reached the near-Earth Asteroid (162173) Ryugu.
Krause, Christian, Moussi-Soffys, A., Grundmann, J. T., Lange, Caroline, Ho, Tra-Mi, Sasaki, Kaname, Maibaum, M., Ulamec, Stephan, Lorda, Laurence, Biele, Jens   +9 more
core  

Initial study of regolith exposure ages and burial conditions on Ryugu: Cosmogenic nuclides score in two touchdowns

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 565-579, April 2026.
Abstract Surface processes on the asteroid Ryugu have been investigated using cosmic‐ray‐produced radionuclides, 10Be, 26Al, and 36Cl, and stable noble gases, on eight samples returned by the Hayabusa2 spacecraft. The 10Be and 26Al along with 21Ne measurements indicate that the two Chamber A samples A0105 collected during the first touchdown (TD) were ...
Kunihiko Nishiizumi, Keisuke Nagao, Marc W. Caffee, Ryuji Okazaki, Jozef Masarik, Hisayoshi Yurimoto, Tomoki Nakamura, Takaaki Noguchi, Hiroshi Naraoka, Hikaru Yabuta, Kanako Sakamoto, Kasumi Yogata, Toru Yada, Shogo Tachibana, Sei‐ichiro Watanabe, Yuichi Tsuda, Masanao Abe, Kazuya Kumagai, Akiko Miyazaki, Aiko Nakato, Satoru Nakazawa, Masahiro Nishimura, Tatsuaki Okada, Takanao Saiki, Hirotaka Sawada, Satoshi Tanaka, Tomohiro Usui, Koji Wada, Hajime Yano, Makoto Yoshikawa, Hayabusa2 Initial Analysis Volatile Team   +30 more
wiley   +1 more source

The deep-space multi-object orbit determination system and its application to Hayabusa2’s asteroid proximity operations [PDF]

, 2020
The deep-space multi-object orbit determination system (DMOODS) and its application in the asteroid proximity operation of the Hayabusa2 mission are described.
Saiki, Takanao, Oki, Yusuke, Kameda, Shingo, Soldini, Stefania, Ogawa, Naoko, Takeuchi, Hiroshi, Terui, Fuyuto, Kikuchi, Shota, Ikeda, Hitoshi, Takei, Yuto, Kouyama, Toru, Yamada, Manabu, Tsuda, Yuichi, Yoshikawa, Kent, Sakatani, Naoya, Mimasu, Yuya, Ono, Go   +16 more
core   +1 more source

Space weathering acts strongly on the uppermost surface of Ryugu

Communications Earth & Environment, 2023
Returned samples from Cb-type asteroid (162173) Ryugu exhibit very dark spectra in visible and near-infrared ranges, generally consistent with the Hayabusa2 observations. A critical difference is that a structural water absorption of hydrous silicates is
Moe Matsuoka, Ei-ichi Kagawa, Kana Amano, Tomoki Nakamura, Eri Tatsumi, Takahito Osawa, Takahiro Hiroi, Ralph Milliken, Deborah Domingue, Driss Takir, Rosario Brunetto, Antonella Barucci, Kohei Kitazato, Seiji Sugita, Yuri Fujioka, Osamu Sasaki, Shiho Kobayashi, Takahiro Iwata, Tomokatsu Morota, Yasuhiro Yokota, Toru Kouyama, Rie Honda, Shingo Kameda, Yuichiro Cho, Kazuo Yoshioka, Hirotaka Sawada, Masahiko Hayakawa, Naoya Sakatani, Manabu Yamada, Hidehiko Suzuki, Chikatoshi Honda, Kazunori Ogawa, Kei Shirai, Cateline Lantz, Stefano Rubino, 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, Sei-ichiro Watanabe, Yuichi Tsuda   +56 more
doaj   +1 more source

MASCOT - a Mobile Lander on-board Hayabusa2 Spacecraft - Operations on Ryugu [PDF]

, 2021
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
Saiki, Takanao, Jaumann, R., Sasaki, Kaname, Knollenberg, Jörg, Schmitz, Nicole, Ulamec, Stephan, Cenac-Morthe, Celine, Lorda, Laurence, Biele, Jens, Auster, H.-U., Cozzoni, Barbara, Hercik, D., Tsuda, Yuichi, Schlotterer, Markus, Moussi, Aurelie, Cordero, Federico, Bibring, Jean-Pierre, MASCOT Team, the, Glassmeier, K. H., Hamm, V., Küchemann, Oliver, Dudal, Clement, Watanabe, S., Wolff, Friederike, Lange, Caroline, Grott, Matthias, Okada, Tatsuaki, Embacher, Daniel, Grundmann, Jan Thimo, Kayal, Kagan, Krause, Christian, Maibaum, Michael, Fantinati, Cinzia, Reill, Josef, Ho, Tra-Mi, Toth, Norbert, Fischer, Hans-Herbert, Mimasu, Yuya, Granena, David, May, Daniel, Yoshimitsu, Tetsuo   +40 more
core  

Apatite in Bennu samples indicates multiple stages of aqueous alteration

Meteoritics &Planetary Science, Volume 61, Issue 3, Page 504-521, March 2026.
Abstract Calcium phosphates are ubiquitous in planetary materials, including samples returned from asteroid Bennu by the OSIRIS‐REx mission. We characterized apatite [Ca5(PO4)3(F,Cl,OH)] grains in Bennu samples by scanning electron microscopy, electron microprobe analysis, and transmission electron microscopy to investigate their compositions, mineral ...
Laura B. Seifert, T. M. Erickson, L. P. Keller, J. J. Barnes, K. Thomas‐Keprta, L. Le, J. Gorce, Z. Rahman, T. J. Zega, H. C. Connolly Jr, D. S. Lauretta   +10 more
wiley   +1 more source

Concurrent AIV as a method to hard tailor test- and model philosophies in times of need

MethodsX, 2019
MASCOT, a small 11 kg prototype Asteroid Lander on-board JAXA’s Hayabusa2 space probe, was launched on December 3rd, 2014, and arrived at its destined target asteroid (162173) Ryugu on June 27, 2018.
Christian Grimm, Jeffrey Hendrikse
doaj   +1 more source

Characteristics of Natural Remanence Records in Fine‐Grained Particles Returned From Asteroid Ryugu

Journal of Geophysical Research: Planets, Volume 131, Issue 2, February 2026.
Abstract Particles collected from the asteroid Ryugu by the Hayabusa2 spacecraft offer a unique opportunity to investigate the magnetic record of the primitive solar system, as any terrestrial magnetic contamination is minimal and can be accounted for.
Masahiko Sato, Yuki Kimura, Tadahiro Hatakeyama, Tomoki Nakamura, Satoshi Okuzumi, Sei‐ichiro Watanabe, Seiji Sugita, Satoshi Tanaka, Shogo Tachibana, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Yuichi Tsuda   +27 more
wiley   +1 more source

Feasibility Analysis of a Hypothetical Kinetic-impact Deflection of 2024 YR4 Using In-space Hayabusa2 for Earth-impact Risk Reduction

The Planetary Science Journal
The near-Earth asteroid 2024 YR4 was reported to have a non-negligible Earth-impact probability in 2032 December. Although the impact probability has since been reduced to nearly zero, this study investigates a hypothetical planetary defense scenario in ...
Kaho Nakagawa, Hiroshi Takeuchi, Takanao Saiki, Makoto Yoshikawa, Yuichi Tsuda   +4 more
doaj   +1 more source