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Mid-infrared emissivity of partially dehydrated asteroid (162173) Ryugu shows strong signs of aqueous alteration

The near-Earth asteroid (162173) Ryugu, the target of Hayabusa2 space mission, was observed via both orbiter and the lander instruments. The infrared radiometer on the MASCOT lander (MARA) is the only instrument providing spectrally resolved mid-infrared (MIR) data, which is crucial for establishing...

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Main Authors: Hamm, Maximilian (Author) , Grott, M. (Author) , Senshu, H. (Author) , Knollenberg, J. (Author) , Wiljes, Jana de (Author) , Hamilton, V. E. (Author) , Scholten, F. (Author) , Matz, K. D. (Author) , Bates, H. (Author) , Maturilli, A. (Author) , Shimaki, Y. (Author) , Sakatani, N. (Author) , Neumann, Wladimir (Author) , Okada, T. (Author) , Preusker, F. (Author) , Elgner, S. (Author) , Helbert, J. (Author) , Kührt, E. (Author) , Ho, T.-M. (Author) , Tanaka, S. (Author) , Jaumann, R. (Author) , Sugita, S. (Author)
Format: Article (Journal)
Language:English
Published: 18 January 2022
In: Nature Communications
Year: 2022, Volume: 13, Pages: 1-12
ISSN:2041-1723
DOI:10.1038/s41467-022-28051-y
Online Access:Verlag, kostenfrei, Volltext: https://doi.org/10.1038/s41467-022-28051-y
Verlag, kostenfrei, Volltext: https://www.nature.com/articles/s41467-022-28051-y
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Author Notes:M. Hamm, M. Grott, H. Senshu, J. Knollenberg, J. de Wiljes, V. E. Hamilton, F. Scholten, K. D. Matz, H. Bates, A. Maturilli, Y. Shimaki, N. Sakatani, W. Neumann, T. Okada, F. Preusker, S. Elgner, J. Helbert, E. Kührt, T.-M. Ho, S. Tanaka, R. Jaumann, S. Sugita

MARC

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245 1 0 |a Mid-infrared emissivity of partially dehydrated asteroid (162173) Ryugu shows strong signs of aqueous alteration  |c M. Hamm, M. Grott, H. Senshu, J. Knollenberg, J. de Wiljes, V. E. Hamilton, F. Scholten, K. D. Matz, H. Bates, A. Maturilli, Y. Shimaki, N. Sakatani, W. Neumann, T. Okada, F. Preusker, S. Elgner, J. Helbert, E. Kührt, T.-M. Ho, S. Tanaka, R. Jaumann, S. Sugita 
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520 |a The near-Earth asteroid (162173) Ryugu, the target of Hayabusa2 space mission, was observed via both orbiter and the lander instruments. The infrared radiometer on the MASCOT lander (MARA) is the only instrument providing spectrally resolved mid-infrared (MIR) data, which is crucial for establishing a link between the asteroid material and meteorites found on Earth. Earlier studies revealed that the single boulder investigated by the lander belongs to the most common type found on Ryugu. Here we show the spectral variation of Ryugu’s emissivity using the complete set of in-situ MIR data and compare it to those of various carbonaceous chondritic meteorites, revealing similarities to the most aqueously altered ones, as well as to asteroid (101955) Bennu. The results show that Ryugu experienced strong aqueous alteration prior to any dehydration. 
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