Hayabusa2/NIRS3 spectral observations of asteroid (162173) Ryugu - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2018

Hayabusa2/NIRS3 spectral observations of asteroid (162173) Ryugu

R. Brunetto
K. Kitazato
S. Matsuura
T. Arai
  • Fonction : Auteur
Y. Nakauchi
T. Nakamura
  • Fonction : Auteur
M. Matsuoka
H. Senshu
  • Fonction : Auteur
N. Hirata
T. Hiroi
  • Fonction : Auteur
L. Riu
D. L. Domingue
  • Fonction : Auteur
D. Takir
  • Fonction : Auteur
J. P. Bibring
  • Fonction : Auteur
S. Watanabe

Résumé

On 27 June 2018, JAXA's Hayabusa2 spacecraft arrived at a distance of 20 km from its target 162173 Ryugu, a sub-km sized asteroid in the near-Earth space, and began its 1.5-year asteroid proximity operation. We have performed near-infrared (1.8-3.2 µm) spectroscopic observations of Ryugu using the NIRS3 instrument onboard Hayabusa2 to begin characterizing and mapping the surface composition. The initial data, obtained by NIRS3 at a spatial resolution of about 35 m, show a very dark surface with little spectral variations across the surface. At this stage, the lack of a significant 2.7-µm feature illustrates that the spectra of Ryugu are different from those of phyllosilicate-rich carbonaceous chondrites. We will present the results of the analysis of the NIRS3 data, including the high-resolution data to be obtained during the first descent operations.
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Dates et versions

hal-02405404 , version 1 (11-12-2019)

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Citer

R. Brunetto, K. Kitazato, T. Iwata, M. Abe, M. Ohtake, et al.. Hayabusa2/NIRS3 spectral observations of asteroid (162173) Ryugu. American Geophysical Union, Fall Meeting 2018, Dec 2018, Washington, United States. ⟨hal-02405404⟩
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