Results 41 to 50 of about 296 (155)

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

JAXA curation for Bennu samples returned by the NASA's OSIRIS‐REx mission

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 182-207, January 2026.
Abstract NASA's OSIRIS‐REx mission successfully collected and returned ~121.6 g of bulk samples from the B‐type, near‐Earth asteroid (101955) Bennu to Earth in September 2023. Upon returning to Earth, the samples were transported to the NASA Johnson Space Center where most of the samples have been stored and processed.
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   +34 more
wiley   +1 more source

Nondestructive analysis of Bennu samples toward comparative studies with Ryugu samples

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 3-16, January 2026.
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.
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   +32 more
wiley   +1 more source

Occurrence and characterization of nanosulfide‐rich regions on asteroid Ryugu: Insights from mackinawite and pyrrhotite

Meteoritics &Planetary Science, Volume 61, Issue 1, Page 168-181, January 2026.
Abstract Samples returned from asteroid Ryugu by the Hayabusa2 mission are dominated by fine‐grained matrix material made of phyllosilicates and nanosulfides. Here, we report the mineralogical, textural, and chemical characteristics of nanosulfide‐rich regions identified in Ryugu particles.
Roberto Conconi, Hugues Leroux, Maya Marinova, Sylvain Laforet, Damien Jacob, Léna Jossé, Alice Aléon‐Toppani, Zélia Dionnet, Rosario Brunetto, Corentin Le Guillou   +9 more
wiley   +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

Sulfur‐bearing serpentine in carbonaceous chondrites

Meteoritics &Planetary Science, Volume 60, Issue 12, Page 2864-2890, December 2025.
Abstract A correlative multi‐technique approach, including electron microscopy and X‐ray synchrotron work, has been used to obtain both structural and compositional information of a sulfur‐bearing serpentine identified in several carbonaceous chondrites (Winchcombe CM2, Aguas Zarcas CM2, Ivuna CI, and Orgueil CI), and in Ryugu samples returned by the ...
N. Topping, J. C. Bridges, L. J. Hicks, L. Petera, C. S. Allen, J. Ryu, D. G. Hopkinson, M. Danaie, L. Blase, F. M. Willcocks, G. Douglas, H. G. Changela, T. Noguchi, T. Matsumoto, A. Miyake   +14 more
wiley   +1 more source

Boulders on Bennu: Low Apparent Thermal Inertia Caused by Thermal Fatigue Fractures

Geophysical Research Letters, Volume 52, Issue 21, 16 November 2025.
Abstract Boulders covering the surfaces of asteroids Bennu and Ryugu have apparent thermal inertias substantially lower than their meteorite analogs. This has led to the inference that boulders on Bennu may be unlike any known meteorite. However, samples returned from Ryugu have a thermal inertia 3.5 times higher than the apparent thermal inertia ...
Catherine M. Elder
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

Petrography of phosphates in CI and CY carbonaceous chondrites

Meteoritics &Planetary Science, Volume 60, Issue 11, Page 2594-2622, November 2025.
Abstract Phosphate minerals are significant carriers of volatiles (e.g., OH) and halogens in chondritic material; however, their origin in most groups of carbonaceous chondrites remains poorly characterized. We have determined the abundance, morphology, texture, and composition of phosphate grains in aqueously altered CI chondrites and in hydrated and ...
C. S. Harrison, A. J. King, R. H. Jones, L. Piani   +3 more
wiley   +1 more source

Amino acids on witness coupons collected from the ISAS/JAXA curation facility for the assessment and quality control of the Hayabusa2 sampling procedure

Earth, Planets and Space, 2018
The Hayabusa2 mission aims to obtain pristine samples from a near-Earth carbonaceous-type (C-type) asteroid, 162173 Ryugu, and return them to Earth. One of the scientific goals of the mission is to understand the origin and evolution of organic materials
Haruna Sugahara, Yoshinori Takano, Yuzuru Karouji, Kazuya Kumagai, Toru Yada, Naohiko Ohkouchi, Masanao Abe, Hayabusa2 project team   +7 more
doaj   +1 more source