TY - JOUR
T1 - Detectability of hydrous minerals using ONC-T camera onboard the Hayabusa2 spacecraft
AU - Kameda, S.
AU - Suzuki, H.
AU - Cho, Y.
AU - Koga, S.
AU - Yamada, M.
AU - Nakamura, T.
AU - Hiroi, T.
AU - Sawada, H.
AU - Honda, R.
AU - Morota, T.
AU - Honda, C.
AU - Takei, A.
AU - Takamatsu, T.
AU - Okumura, Y.
AU - Sato, M.
AU - Yasuda, T.
AU - Shibasaki, K.
AU - Ikezawa, S.
AU - Sugita, S.
N1 - Publisher Copyright:
© 2015 COSPAR. Published by Elsevier Ltd. All rights reserved.
PY - 2015
Y1 - 2015
N2 - The Hayabusa2 spacecraft has three framing cameras (ONC-T, ONC-W1, and ONC-W2) for optical navigation to asteroid 1999 JU 3 . The ONC-T is a telescopic camera with seven band-pass filters in the visible and near-infrared range. These filters are placed on a wheel, which rotates to put a selected filter for different observations, enabling multiband imaging. Previous ground-based observations suggesting that hydrous materials may be present on the surface of 1999 JU 3 and distributed in relatively limited areas. The presence of hydrous minerals indicates that this asteroid experienced only low to moderate temperatures during its formation, suggesting that primordial materials are preserved. In order to find the best sampling sites, we will perform reflectance spectroscopic observations using the ONC-T near the asteroid after arrival. Finding regions rich in hydrous minerals is the key for this remote sensing observation. In preparation for this, we conducted ground-based experiments for the actual ONC-T flight model to confirm the detectability of the absorption band of Fe-rich serpentine. As a result, we detected the absorption band near 0.7 μm by reflectance spectroscopy of CM2 chondrites, such as Murchison and Nogoya, which are known to contain the Fe-rich serpentine, and did not detect any 0.7 μm absorption in Jbilet Winselwan CM2 chondrite with decomposed Fe-rich serpentine.
AB - The Hayabusa2 spacecraft has three framing cameras (ONC-T, ONC-W1, and ONC-W2) for optical navigation to asteroid 1999 JU 3 . The ONC-T is a telescopic camera with seven band-pass filters in the visible and near-infrared range. These filters are placed on a wheel, which rotates to put a selected filter for different observations, enabling multiband imaging. Previous ground-based observations suggesting that hydrous materials may be present on the surface of 1999 JU 3 and distributed in relatively limited areas. The presence of hydrous minerals indicates that this asteroid experienced only low to moderate temperatures during its formation, suggesting that primordial materials are preserved. In order to find the best sampling sites, we will perform reflectance spectroscopic observations using the ONC-T near the asteroid after arrival. Finding regions rich in hydrous minerals is the key for this remote sensing observation. In preparation for this, we conducted ground-based experiments for the actual ONC-T flight model to confirm the detectability of the absorption band of Fe-rich serpentine. As a result, we detected the absorption band near 0.7 μm by reflectance spectroscopy of CM2 chondrites, such as Murchison and Nogoya, which are known to contain the Fe-rich serpentine, and did not detect any 0.7 μm absorption in Jbilet Winselwan CM2 chondrite with decomposed Fe-rich serpentine.
KW - Asteroid
KW - Chondrites
KW - Hayabusa2
KW - ONC
KW - Spectroscopy
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U2 - 10.1016/j.asr.2015.06.037
DO - 10.1016/j.asr.2015.06.037
M3 - Article
AN - SCOPUS:84954074511
VL - 56
SP - 1519
EP - 1524
JO - Life sciences and space research
JF - Life sciences and space research
SN - 0273-1177
IS - 7
ER -