The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy.
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| Title: | The surface composition of asteroid 162173 Ryugu from Hayabusa2 near-infrared spectroscopy. |
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| Authors: | Kitazato, K. (AUTHOR), Milliken, R. E. (AUTHOR), Iwata, T. (AUTHOR), Abe, M. (AUTHOR), Ohtake, M. (AUTHOR), Matsuura, S. (AUTHOR), Arai, T. (AUTHOR), Nakauchi, Y. (AUTHOR), Nakamura, T. (AUTHOR), Matsuoka, M. (AUTHOR), Senshu, H. (AUTHOR), Hirata, N. (AUTHOR), Hiroi, T. (AUTHOR), Pilorget, C. (AUTHOR), Brunetto, R. (AUTHOR), Poulet, F. (AUTHOR), Riu, L. (AUTHOR), Bibring, J.-P. (AUTHOR), Takir, D. (AUTHOR), Domingue, D. L. (AUTHOR) |
| Source: | Science (pre-March 2025). 4/19/2019, Vol. 364 Issue 6437, p272-275. 4p. 3 Diagrams. |
| Subjects: | Asteroids, Space probes, Infrared spectroscopy, Hydroxyl group, Carbonaceous chondrites (Meteorites) |
| Abstract: | The near-Earth asteroid 162173 Ryugu, the target of the Hayabusa2 sample-return mission, is thought to be a primitive carbonaceous object. We report reflectance spectra of Ryugu’s surface acquired with the Near-Infrared Spectrometer (NIRS3) on Hayabusa2, to provide direct measurements of the surface composition and geological context for the returned samples. A weak, narrow absorption feature centered at 2.72 micrometers was detected across the entire observed surface, indicating that hydroxyl (OH)–bearing minerals are ubiquitous there. The intensity of the OH feature and low albedo are similar to thermally and/or shock-metamorphosed carbonaceous chondrite meteorites. There are few variations in the OH-band position, which is consistent with Ryugu being a compositionally homogeneous rubble-pile object generated from impact fragments of an undifferentiated aqueously altered parent body. [ABSTRACT FROM AUTHOR] |
| Copyright of Science (pre-March 2025) is the property of American Association for the Advancement of Science and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Psychology and Behavioral Sciences Collection |
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