Details

Autor(en) / Beteiligte

• Breitenfeld, L B
• Rogers, A D
• Glotch, T D
• Kaplan, H H
• Hamilton, V E
• Christensen, P R

Titel

Mapping Phyllosilicates on the Asteroid Bennu Using Thermal Emission Spectra and Machine Learning Model Applications

Ist Teil von

• Geophysical research letters, 2022-10, Vol.49 (20), p.n/a

Ort / Verlag

Goddard Space Flight Center: Wiley

Erscheinungsjahr

2022

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• Bennu, the target of the OSIRIS-REx mission, is an asteroid with compositions analogous to low petrologic type CI, CM, CR, and/or ungrouped carbonaceous chondrites. Asteroids like Bennu provide information about the building blocks of the early Solar System. Analysis of the mid-infrared remote sensing data informs mineral quantification. We apply a phyllosilicate specific model, developed by Breitenfeld et al. (2021) that distinguishes between Mg and Fe serpentines, to Baseball Diamond 1 (BBD1), Equatorial Station 3 (EQ3), and Touch-And-Go OSIRIS-REx Thermal Emission Spectrometer data. The average total phyllosilicate predictions are 73 (BBD1) and 72 vol% (EQ3). We observe higher Fe-cronstedtite and lower Mg-rich serpentine content in the equatorial region of Bennu than average. Mid-infrared spectral variability may be explained by sorting effects through mass movement.