TY - JOUR
T1 - Itokawa dust particles
T2 - A direct link between S-type asteroids and ordinary chondrites
AU - Nakamura, Tomoki
AU - Noguchi, Takaaki
AU - Tanaka, Masahiko
AU - Zolensky, Michael E.
AU - Kimura, Makoto
AU - Tsuchiyama, Akira
AU - Nakato, Aiko
AU - Ogami, Toshihiro
AU - Ishida, Hatsumi
AU - Uesugi, Masayuki
AU - Yada, Toru
AU - Shirai, Kei
AU - Fujimura, Akio
AU - Okazaki, Ryuji
AU - Sandford, Scott A.
AU - Ishibashi, Yukihiro
AU - Abe, Masanao
AU - Okada, Tatsuaki
AU - Ueno, Munetaka
AU - Mukai, Toshifumi
AU - Yoshikawa, Makoto
AU - Kawaguchi, Junichiro
PY - 2011/8/26
Y1 - 2011/8/26
N2 - The Hayabusa spacecraft successfully recovered dust particles from the surface of near-Earth asteroid 25143 Itokawa. Synchrotron-radiation x-ray diffraction and transmission and scanning electron microscope analyses indicate that the mineralogy and mineral chemistry of the Itokawa dust particles are identical to those of thermally metamorphosed LL chondrites, consistent with spectroscopic observations made from Earth and by the Hayabusa spacecraft. Our results directly demonstrate that ordinary chondrites, the most abundant meteorites found on Earth, come from S-type asteroids. Mineral chemistry indicates that the majority of regolith surface particles suffered long-term thermal annealing and subsequent impact shock, suggesting that Itokawa is an asteroid made of reassembled pieces of the interior portions of a once larger asteroid.
AB - The Hayabusa spacecraft successfully recovered dust particles from the surface of near-Earth asteroid 25143 Itokawa. Synchrotron-radiation x-ray diffraction and transmission and scanning electron microscope analyses indicate that the mineralogy and mineral chemistry of the Itokawa dust particles are identical to those of thermally metamorphosed LL chondrites, consistent with spectroscopic observations made from Earth and by the Hayabusa spacecraft. Our results directly demonstrate that ordinary chondrites, the most abundant meteorites found on Earth, come from S-type asteroids. Mineral chemistry indicates that the majority of regolith surface particles suffered long-term thermal annealing and subsequent impact shock, suggesting that Itokawa is an asteroid made of reassembled pieces of the interior portions of a once larger asteroid.
UR - http://www.scopus.com/inward/record.url?scp=80052151731&partnerID=8YFLogxK
U2 - 10.1126/science.1207758
DO - 10.1126/science.1207758
M3 - Article
AN - SCOPUS:80052151731
SN - 0036-8075
VL - 333
SP - 1113
EP - 1116
JO - Science
JF - Science
IS - 6046
ER -