Abstract
Sample return reveals that the asteroid Ryugu is a carbon-rich primitive body
Highlights
Samples returned from the carbonaceous (C-type) asteroid 162173 Ryugu by the Hayabusa[2] mission were preliminarily analysed in a non-destructive manner
Carbonaceous chondrites are among the most primitive meteorites and a possible source of organic materials and water on proto-Earth[1]. Their parent bodies have long been thought of as C-type asteroids based on their dark spectral features and infrared absorption band at 2.7 μm, both of which are typical of hydrous minerals[2]
Our mission was to characterize these bulk samples without destroying them and compare our findings with those obtained from the platform of Hayabusa[2] and those obtained in laboratory experiments
Summary
Samples returned from the carbonaceous (C-type) asteroid 162173 Ryugu by the Hayabusa[2] mission were preliminarily analysed in a non-destructive manner. Their dark spectral features, small densities and absence of a high-temperature component imply that they are most similar to primitive CI group chondrites, but show some differences to known planetary materials. This is a summary of: Yada, T. et al Preliminary analysis of the Hayabusa[2] samples returned from C-type asteroid Ryugu.
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