Results 81 to 90 of about 2,447 (234)

Effects of dust layers on thermal emission from airless bodies

Progress in Earth and Planetary Science, 2019
We have investigated the influence of thin thermally opaque dust layers on the thermal emission of rocks and regolith and determined the thermal response of these dust-covered surfaces to diurnal insolation cycles.
Jens Biele, Ekkehard Kührt, Hiroki Senshu, Naoya Sakatani, Kazunori Ogawa, Maximilian Hamm, Matthias Grott, Tatsuaki Okada, Takehiko Arai   +8 more
doaj   +1 more source

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

Non‐innocent solvents in meteorite extractions: Evidence for artifact formation

Meteoritics &Planetary Science, Volume 61, Issue 4, Page 706-719, April 2026.
Abstract Solvent extraction is a cornerstone of meteoritic organic and inorganic chemistry, yet the assumption that common solvents act as chemically inert media is becoming increasingly untenable. This study reports that low‐molecular‐weight alcohols, particularly methanol and ethanol, are “non‐innocent” solvents when used to extract soluble sulfur ...
N. Randazzo, R. W. Hilts, R. M. Whittal, B. Reiz, V. Olan‐Rubio, C. D. K. Herd, I. H. Krouse   +6 more
wiley   +1 more source

Hydrogen abundance estimation model and application to (162173) Ryugu

, 2021
Context. The JAXA asteroid sample return mission Hayabusa2 acquired a huge quantity of data from the asteroid (162173) Ryugu during its 1.5 years in asteroid proximity orbit. On December 5, 2020 (Japan time), Hayabusa brought back to Earth a 5.4 g sample
T. Iwata, Matsuoka, M., K. Kitazato, Hasselmann, P., H, Iwata, T., Clark, B., E, B. E. Clark, Domingue, D., M. A. Barucci, P. H. Hasselmann, D. Domingue, Kitazato, K., A. Praet, Praet, A., M. Matsuoka, Barucci, M., A   +15 more
core   +1 more source

Collisional formation of top-shaped asteroids and implications for the origins of Ryugu and Bennu [PDF]

, 2020
Asteroid shapes and hydration levels can serve as tracers of their history and origin. For instance, the asteroids (162173) Ryugu and (101955) Bennu have an oblate spheroidal shape with a pronounced equator, but contain different surface hydration levels.
Jutzi, M., Manzoni, C, Bottke, W., Hirabayashi, M, Walsh, K J, Miyamoto, H, Bottke, W F, Miyamoto, H., Schwartz, S. R., Walsh, K., Manzoni, C., Barnouin, O. S., Hirabayashi, M., May, B. H., Sugita, S, Barnouin, O S, Watanabe, S, Michel, Patrick, Lauretta, D., Yoshikawa, M., Schwartz, S., Richardson, D C, Bottke, W. F., Watanabe, S., Richardson, D. C., Michel, P, May, B., Richardson, D., Connolly, H C, Walsh, K. J., Jutzi, M, Lauretta, D. S., Connolly, Harold, Jr., Schwartz, S R, Yoshikawa, M, Lauretta, D S, Connolly, H., Sugita, S., Ballouz, R-L, May, B H, Michel, P., Ballouz, R.-L., Connolly, H. C., Barnouin, Olivier   +43 more
core   +1 more source

Gravity Survey in Cape Ryugu and Syowa Station, Antarctic

Antarctic Record, 1980
Gravity survey was carried out in Cape Ryugu, and East and West Ongul Islands by the summer party of the 19th Japanese Antarctic Research Expedition (JARE-19) using a LaCoste and Romberg model G land gravity meter.
Katsutada Kaminuma, Toshio Kunimi, Shigeru Ohtaki   +2 more
doaj   +1 more source

Phyllosilicates with embedded Fe-based nanophases in Ryugu and Orgueil

, 2023
Samples were recently collected from the carbonaceous asteroid (162173) Ryugu, by the Japan Aerospace Exploration Agency (JAXA) Hayabusa2 mission. They resemble CI chondrites material, thus showing clear evidence of extensive aqueous alteration attested ...
Nakazawa, Satoru, Ohtaki, Kenta K., Viennet, Jean‐christophe, Marinova, Maya, Phan, Thi H. V., Miyahara, Masaaki, Sakamotoa, Naoya, Frank, David R., Zega, Thomas, Sun, Mingqi, Nakamura, Tomoki, Tsuda, Yuichi, Matsumoto, Toru, Lee, Martin R., Hicks, Leon, Rebois, Rolando, Langenhorst, Falko, Bridges, John, Hallatt, Daniel, Okada, Tatsuaki, Jacob, Damien, Yasutake, Masahiro, Laforet, Sylvain, Uesugi, Kentaro, Bradley, John, Michikami, Tatsuhiro, Mouloud, Bahae‐eddine, Bridges, John C., Kawasaki, Noriyuki, Saiki, Takanao, Takeuchi, Akihisa, Beck, Pierre, Abreu, Neyda, Okumura, Shota, Burgess, Kate, Martinez, James, Watanabe, Sei-Ichiro, Miyake, Akira, Tsuchiyama, Akira, Phan, Thi H.P., Usui, Tomohiro, Haruta, Mitsutaka, Frank, David, Phan, Thi, Dobrica, Elena, Hata, Satoshi, Saito, Hikaru, Zanetta, Pierre‐m., Okazaki, Ryuji, Yoshikawa, Makoto, Naraoka, Hiroshi, Ishii, Hope A., Cymes, Brittany A., Miyazaki, Akiko, Nishimura, Masahiro, Ishii, Hope, Noguchi, Takaaki, Enju, Satomi, Bland, Phil, Bland, Phil A., Mitsukawa, Itaru, Nagashima, Kazuhide, Yabuta, Hikaru, Tomioka, Naotaka, Takigawa, Aki, Leroux, Hugues, Tanaka, Satoshi, Daly, Luke, Nakauchi, Yusuke, Harries, Dennis, Seto, Yusuke, de la Pena, Francisco, Mouloud, Bahae-Eddine, Tachibana, Shogo, Viennet, Jean-Christophe, Troadec, David, Cymes, Brittany, Sakamoto, Kanako, Ohtaki, Kenta, Lee, Martin, Thompson, Michelle S., Watanabe, Sei‐ichiro, Igami, Yohei, Bradley, John P., Gray, Jennifer, Yurimoto, Hisayoshi, Matsumoto, Megumi, Zolensky, Michael, Matsuno, Junya, Stroud, Rhonda, Uesugi, Masayuki, Yada, Toru, Thompson, Michelle, Zolensky, Michael E., Teurtrie, Adrien, Terui, Fuyuto, Abreu, Neyda M., Abe, Masanao, Fernandez, Mario Pelaez, Le Guillou, Corentin, Zanetta, Pierre-M., Nakato, Aiko   +101 more
core   +1 more source

Microstructural and chemical features of impact melts on Ryugu particle surfaces: Records of interplanetary dust hit on asteroid Ryugu. [PDF]

Sci Adv
The Hayabusa2 spacecraft delivered samples of the carbonaceous asteroid Ryugu to Earth. Some of the sample particles show evidence of micrometeoroid impacts, which occurred on the asteroid surface. Among those, particles A0067 and A0094 have flat surfaces on which a large number of microcraters and impact melt splashes are observed.
Matsumoto M, Matsuno J, Tsuchiyama A, Nakamura T, Enokido Y, Kikuiri M, Nakato A, Yasutake M, Uesugi K, Takeuchi A, Enju S, Okumura S, Mitsukawa I, Sun M, Miyake A, Haruta M, Igami Y, Yurimoto H, Noguchi T, Okazaki R, Yabuta H, Naraoka H, Sakamoto K, Tachibana S, Zolensky M, Yada T, Nishimura M, Miyazaki A, Yogata K, Abe M, Okada T, Usui T, Yoshikawa M, Saiki T, Tanaka S, Terui F, Nakazawa S, Watanabe SI, Tsuda Y.   +38 more
europepmc   +3 more sources

MASCOT magnetometer (MasMag) data during the landing on Ryugu

The dataset contains data from the MASCOT magnetometer during measured during the landing on asteroid Ryugu on October 3, 2018. The dataset provides archive for data analysis used to determine Ryugu's magnetic properties as presented in paper "Magnetic ...
Hercik, David
core   +2 more sources

JWST Spectroscopy of (142) Polana: Connection to NEAs (101955) Bennu and (162173) Ryugu

The Planetary Science Journal
The new Polana collisional family is the hypothesized origin of the near-Earth asteroids (101955) Bennu, which was the target of the NASA OSIRIS-REx mission, and (162173) Ryugu, which was the target of the JAXA Hayabusa2 mission.
Anicia Arredondo, Tracy M. Becker, Maggie M. McAdam, Andrew S. Rivkin, Stephanie Jarmak, Ian Wong   +5 more
doaj   +1 more source