Results 51 to 60 of about 1,258 (144)

Spectral Type and Geometric Albedo of (98943) 2001 CC21, the Hayabusa2# Mission Target [PDF]

, 2023
We conducted optical polarimetry and near-infrared spectroscopy of JAXA's Hayabusa2# mission target, (98943) 2001 CC21, in early 2023. Our new observations indicated that this asteroid has a polarimetric inversion angle of ~21 deg, absorption bands ...
Zuri Gray, Takagi, Seiko, Pursimo, Tapio,, Gadeberg, Julie Thiim, Thomsen, Jeppe Sinkbaek, Masateru Ishiguro, Gray, Zuri,, Ryo Imazawa, Hasegawa, Sunao, Pursimo, Tapio, Koji S Kawabata, Geem, Jooyeon, Ishiguro, Masateru, Julie Thiim Gadeberg, Yoshikawa, Makoto,, Hasegawa, Sunao,, Sekiguchi, Tomohiko, Takagi, Seiko,, Sunho Jin, Jooyeon Geem, Naito, Hiroyuki, Hiroshi Akitaya, Jeppe Sinkbaek Thomsen, Tomohiko Sekiguchi, Ishiguro, Masateru,, Tatsuharu Oono, Oono, Tatsuharu,, Imazawa, Ryo, Granvik, Mikael,, Akitaya, Hiroshi,, Makoto Yoshikawa, Pedros, Oliver Durfeldt, Tapio Pursimo, Kawabata, Koji S., Djupvik, Anlaug A,, Thomsen, Jeppe Sinkbaek,, Anlaug A Djupvik, Djupvik, Anlaug A., Geem, Jooyeon,, Naito, Hiroyuki,, Jin, Sunho,, Granvik, Mikael, Kawabata, Koji S,, Gadeberg, Julie Thiim,, Pedros, Oliver Durfeldt,, Yoonsoo P Bach, Hiroyuki Naito, Kuroda, Daisuke,, Sekiguchi, Tomohiko,, Akitaya, Hiroshi, Oliver Durfeldt Pedros, Djupvik, Anlaug A, Sunao Hasegawa, Daisuke Kuroda, Kuroda, Daisuke, Jin, Sunho, Bach, Yoonsoo P., Gray, Zuri, Oono, Tatsuharu, Bach, Yoonsoo P,, Imazawa, Ryo,, Seiko Takagi, Yoshikawa, Makoto, Mikael Granvik   +63 more
core   +1 more source

Visible, near‐, and thermal infrared spectra of asteroid Bennu samples: Relationship to and implications for remote sensing of carbonaceous asteroids

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1788-1805, August 2026.
Abstract Remote spectroscopy is used to characterize the mineralogy and infer the history of planetary bodies. Carbonaceous asteroids, such as B‐type (101955) Bennu, represent the earliest stages of planet formation. B types have a blue (negative) spectral slope and comprise <5% of asteroids.
V. E. Hamilton, E. A. Cloutis, R. E. Milliken, P. Haenecour, D. R. Golish, K. J. Domanik, T. J. McCoy, L. P. Keller, A. A. Simon, H. H. Kaplan, C. A. Goodrich, S. A. Sandford, D. Applin, T. Hiroi, D. H. Hill, N. G. Lunning, F. M. McCubbin, S. A. Eckley, C. J. Snead, E. H. Blumenfeld, J. E. Aebersold, C. Schultz, N. Bowles, K. A. Shirley, S. S. Russell, J. J. Barnes, T. J. Zega, D. N. DellaGiustina, A. J. Ryan, D. P. Glavin, J. P. Dworkin, H. C. Connolly Jr., D. S. Lauretta   +32 more
wiley   +1 more source

Updated In-flight Calibration of the Hayabusa2/NIRS3 Spectrometer: New Global Near-infrared Photometric Properties of Asteroid (162173) Ryugu

The Planetary Science Journal
The Near-Infrared Spectrometer (NIRS3) onboard Hayabusa2 observed asteroid (162173) Ryugu, searching especially for signatures of water-bearing minerals.
Antonin Wargnier, Eri Tatsumi, Koki Yumoto, Mayumi Ichikawa, Shin-ya Murakami, Yuichiro Nagai, Kazuhiro Honda, Yasuhiro Yokota, Toru Kouyama, Takahiro Iwata, Moe Matsuoka, Satoshi Tanaka, Kohei Kitazato   +12 more
doaj   +1 more source

The role of composition in the spectral evolution of carbonaceous asteroids as informed by Bennu sample return

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1875-1904, August 2026.
Abstract Near‐Earth rubble‐pile asteroids Bennu and Ryugu are part of the carbonaceous taxonomic complex (C‐complex), and samples returned from both bodies resemble the most aqueously altered carbonaceous chondrites. However, telescopic and spacecraft visible–near infrared (VIS–NIR) reflectance spectra of Ryugu exhibit a red (positive) spectral slope ...
Ralph E. Milliken, Takahiro Hiroi, Victoria E. Hamilton, Cody D. Schultz, Ed A. Cloutis, Hannah H. Kaplan, Melissa K. Kontogiannis, Nathalia Vega‐Santiago, Dani N. DellaGiustina, Harold C. Connolly Jr., Dante S. Lauretta   +10 more
wiley   +1 more source

A newly revised estimation of bulk densities and examination of the shape of individual Ryugu grains

Earth, Planets and Space, 2023
The bulk density of grains from a celestial body is a fundamental property related to its composition and structure, contributing to the understanding of its evolutionary history. In this study, we provide the bulk density of 637 grains returned from the
Akiko Miyazaki, Toru Yada, Kasumi Yogata, Kentaro Hatakeda, Aiko Nakato, Masahiro Nishimura, Kana Nagashima, Kazuya Kumagai, Yuya Hitomi, Hiromichi Soejima, Rui Tahara, Rei Kanemaru, Arisa Nakano, Miwa Yoshitake, Ayako Iwamae, Shizuho Furuya, Akira Tsuchiyama, Shogo Tachibana, Tatsuhiro Michikami, Tatsuaki Okada, Masanao Abe, Tomohiro Usui   +21 more
doaj   +1 more source

Mineralogy, mineral chemistry, and redox equilibria in ten aggregate particles from asteroid Bennu

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1905-1927, August 2026.
Abstract Examination of 10 Bennu aggregate particles has revealed the presence of many phases which taken together can provide constraints on the oxygen fugacity (fO2) of Bennu samples. Phyllosilicates (saponite and serpentine), carbonates, oxides (magnetite, chromite), sulfides (pyrrhotite, pentlandite), phosphate (hydroxyapatite, Na‐Mg‐phosphate ...
K. Righter, J. Gorce, L. Le, K. Thomas‐Keprta, Z.E. Wilbur, L.P. Keller, Z. Gainsforth, T.J. McCoy, T.J. Zega, S.S. Russell, H.C. Connolly Jr., D.S. Lauretta   +11 more
wiley   +1 more source

The GAs Extraction and Analyses system (GAEA) for immediate extraction and measurements of volatiles in the Hayabusa2 sample container

Earth, Planets and Space, 2022
Hayabusa2 returned surface samples from the C-type near-Earth asteroid (162173) Ryugu to Woomera, South Australia, in December 2020. The samples returned from Ryugu are expected to contain not only volatile components reflecting its primitive nature, but
Yayoi N. Miura, Ryuji Okazaki, Yoshinori Takano, Kanako Sakamoto, Shogo Tachibana, Keita Yamada, Saburo Sakai, Hirotaka Sawada   +7 more
doaj   +1 more source

Raman analysis of organic refractory materials after energetic processing: Evidence for amorphous carbon on TNOs and comets

Meteoritics &Planetary Science, Volume 61, Issue 8, Page 1994-2015, August 2026.
Abstract Amorphous carbon (αC) is found in various extraterrestrial particles, including those thought to originate from the outer Solar System. αC can form through two main processes involving C‐rich materials: exposure to energetic charged particles and thermal processing.
M. Germanà, A. Vyjidak, G. A. Baratta, B. M. Giuliano, R. G. Urso, C. Scirè, D. Fulvio, T. Grassi, P. Jusko, P. Caselli, M. E. Palumbo   +10 more
wiley   +1 more source

PAHs, hydrocarbons, and dimethylsulfides in Asteroid Ryugu samples A0106 and C0107 and the Orgueil (CI1) meteorite

Earth, Planets and Space, 2023
Evaluating the molecular distribution of organic compounds in pristine extraterrestrial materials is cornerstone to understanding the abiotic synthesis of organics and allows us to better understand the molecular diversity available during the formation ...
José C. Aponte, Jason P. Dworkin, Daniel P. Glavin, Jamie E. Elsila, Eric T. Parker, Hannah L. McLain, Hiroshi Naraoka, Ryuji Okazaki, Yoshinori Takano, Shogo Tachibana, Guannan Dong, Sarah S. Zeichner, John M. Eiler, Hisayoshi Yurimoto, Tomoki Nakamura, Hikaru Yabuta, Fuyuto Terui, Takaaki Noguchi, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Satoshi Tanaka, Satoru Nakazawa, Yuichi Tsuda, Sei-ichiro Watanabe, The Hayabusa2-initial-analysis SOM team, The Hayabusa2-initial-analysis core team   +34 more
doaj   +1 more source

Noble gases and nitrogen in material from asteroid Bennu

Meteoritics &Planetary Science, Volume 61, Issue 7, Page 1593-1609, July 2026.
Abstract We report the elemental and isotopic abundances of all stable noble gases (helium, neon, argon, krypton, and xenon) in eight particles from asteroid Bennu returned by NASA's OSIRIS‐REx mission. We also report nitrogen abundances and isotopic ratios that were analyzed alongside neon and argon in four additional Bennu particles.
B. Marty, L. Zimmermann, E. Füri, D. V. Bekaert, J. J. Barnes, A. N. Nguyen, H. C. Connolly, D. S. Lauretta   +7 more
wiley   +1 more source