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.


    Access

    Download


    Export, share and cite



    Title :

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


    Contributors:

    Published in:

    Nature Communications ; 13 , 364 ; 1-12


    Publication date :

    2022



    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English




    Magnetic Properties of Asteroid (162173) Ryugu

    Hercik, D. / Auster, H-U. / Constantinescu, D. et al. | German Aerospace Center (DLR) | 2020

    Free access

    Cruise status of Hayabusa2: Round trip mission to asteroid 162173 Ryugu

    Tsuda, Yuichi / Watanabe, Sei-ichiro / Saiki, Takanao et al. | Elsevier | 2017



    MASCOT radiometer reveals signs of strong aqueous alteration of (162173) Ryugu's materials

    Hamm, Maximilian / Grott, Matthias / Senshu, H. et al. | German Aerospace Center (DLR) | 2022

    Free access

    In-flight operation of the Hayabusa2 ion engine system on its way to rendezvous with asteroid 162173 Ryugu

    Nishiyama, Kazutaka / Hosoda, Satoshi / Tsukizaki, Ryudo et al. | Elsevier | 2019