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Progress of chemical characterization of asteroid Ryugu samplesIt is believed that meteorites come from asteroids. Samples of asteroid (25143) Itokawa returned by the JAXA Hayabusa mission revealed that S-type asteroids are composed of materials consistent with the ordinary chondrite class[1,2]. The JAXA Hayabusa 2 [3]spacecraft launched on December 3rd, 2014 towards an asteroid (162173) Ryuguto clarify relationships between C-type asteroids and the carbonaceous chondrite class. Remote sensing observations from Hayabusa 2 show that (1) the albedo of Ryugu is darker than those of every known meteorite class[4, 5], (2) an absorption band at 2.72 μm indicates that phyllosilicates are ubiquitous on Ryugu [5],(3) the strength and shape of the absorption band feature suggests that Ryugu materials experienced heating above 300 °C[6], and (4) thermal inertia suggests that Ryugu materials are more porous than every known carbonaceous chondrite[7]. These results suggest that carbonaceous chondrite class materials are plausible for Ryugu materials, but no known carbonaceous chondrite completely matches the results obtained from Ryugu.

*Complete abstract available in attached document
Document ID
20210022574
Acquisition Source
Johnson Space Center
Document Type
Conference Paper
Authors
Lan Anh Ngoc Nguyen (Johnson Space Center Houston, Texas, United States)
T. Nakamura (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
T. Noguchi (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
H. Yabuta (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
H. Naraoka (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
K. Sakamoto (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
S. Tachibana (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
S. Watanabe (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
Y. Tsuda (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
Hisayoshi Yurimoto (Hokkaido University Sapporo, Hokkaidô, Japan)
T. Yokoyama (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
K. Nagashima (University of Hawaii System Honolulu, Hawaii, United States)
I. Nakai (Tokyo University of Science Tokyo, Japan)
Y. Abe (Tokyo Denki University Tokyo, Japan)
Y. Terada (SPring-8)
S. Komatani (HORIBA TECHINO SERVICE Co. ,Ltd.)
M. Morita (HORIBA TECHINO SERVICE Co. ,Ltd.)
K. Ichida (HORIBA TECHINO SERVICE Co. ,Ltd.)
H. Homma (Rigaku (Japan) Tokyo, Tôkyô, Japan)
K. Motomura (Rigaku (Japan) Tokyo, Tôkyô, Japan)
K. Yui (Tokyo University of Science Tokyo, Japan)
T. Usui (Japan Aerospace Exploration Agency Tokyo, Japan)
M. K. Haba (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
T. Iizuka (University of Tokyo)
S. Yoneda (National Museum of Nature and Science Tokyo, Tôkyô, Japan)
H. Hidaka (Nagoya University Nagoya, Japan)
K. Yamashita (Okayama University Okayama, Okayama, Japan)
M. Bizzarro (Natural History Museum of Denmark Copenhagen, Denmark)
F. Moynier (Institut De Physique Du Globe De Paris Paris, France)
M. Schöenbächler (ETH Zurich Zurich, Switzerland)
T. Kleine (University of Münster Münster, Germany)
N. Dauphas (University of Chicago Chicago, Illinois, United States)
Q-Z. Yin (University of California, Davis Davis, California, United States)
M. Wadhwa (Arizona State University Tempe, Arizona, United States)
R. J. Walker (University of Maryland, College Park College Park, Maryland, United States)
R. W. Carlson (Carnegie Institution for Science Washington D.C., District of Columbia, United States)
A. Bouvier (University of Bayreuth Bayreuth, Bayern, Germany)
Y. Amelin (ANU Canberra, Australian Capital Territory, Australia)
L. Qin (China University of Geosciences Beijing, China)
I. Gautam (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
R. Fukai (Japan Aerospace Exploration Agency Tokyo, Japan)
Y. Masuda (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
Y. Hibiya (University of Tokyo)
A. Ishikawa (Tokyo Institute of Technology Tokyo, Tôkyô, Japan)
A. Pack (University of Göttingen Göttingen, Germany)
E. D. Young (University of California, Los Angeles Los Angeles, California, United States)
C. Park (KOPRI)
N. Sakamoto (Hokkaodo University)
W. Fujiya (Ibaraki University Ibaraki, Japan)
N. Kawasaki (Hokkaodo University)
S. Itoh (Kyoto University Kyoto, Japan)
K. Terada (Osaka University Osaka, Japan)
M. Ito (Japan Agency for Marine-Earth Science and Technology Yokosuka, Japan)
M. Chaussidon (Institut De Physique Du Globe De Paris Paris, France)
J. Aleon (National Museum of Natural History Paris, France)
L. Piani (Centre de Recherches Pétrographiques et Géochimiques Vandœuvre-lès-Nancy, France)
S. Russell (National Museum of Natural History Paris, France)
P. Hoppe (MPI Chemistry)
S. Amari (Washington University in St. Louis St Louis, Missouri, United States)
K. D. McKeegan (University of California, Los Angeles Los Angeles, California, United States)
M-C. Liu (University of California, Los Angeles Los Angeles, California, United States)
G. R. Huss (University of Hawaii System Honolulu, Hawaii, United States)
A. N. Krot (University of Hawaii System Honolulu, Hawaii, United States)
C. M. O’D. Alexander (Carnegie Institution for Science Washington D.C., District of Columbia, United States)
L. R. Nittler ORCID(Carnegie Institution for Science Washington D.C., District of Columbia, United States)
A. M. Davis (University of Chicago Chicago, Illinois, United States)
A. Nguyen (National Aeronautics and Space Administration Washington D.C., District of Columbia, United States)
N. Kita (University of Wisconsin–Madison Madison, Wisconsin, United States)
K. Kitajima (University of Wisconsin–Madison Madison, Wisconsin, United States)
T. R. Ireland (University of Queensland Brisbane, Queensland, Australia)
B-G. Choi (SNU)
A-C. Zhang (Nanjing University Nanjing, China)
K. Bajo (Hokkaido University Sapporo, Hokkaidô, Japan)
Date Acquired
October 8, 2021
Subject Category
Space Sciences (General)
Meeting Information
Meeting: Hayabusa Symposium
Location: Online
Country: JP
Start Date: November 16, 2021
End Date: November 17, 2021
Sponsors: Japan Aerospace Exploration Agency
Funding Number(s)
WBS: 191589.04.02.01.08
Distribution Limits
Public
Copyright
Portions of document may include copyright protected material.
Technical Review
NASA Technical Management

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