Abstract Space weathering refers to alteration that occurs in the space environment with
time. Lunar samples, and to some extent meteorites, have provided a benchmark for …

INTRODUCTION The asteroid 162173 Ryugu is the target of the Japanese Hayabusa2
mission, which is designed to collect samples from Ryugu's surface and return them to Earth …

The near-Earth asteroid (162173) Ryugu is thought to be a primitive carbonaceous object
that contains hydrated minerals and organic molecules. We report sample collection from …

INTRODUCTION The color and reflectance of asteroids can be used to infer their
compositions and histories. Variations in these spectrophotometric properties are driven by …

This paper summarizes the evidence for the optical effects of space weathering, as well as
the properties of the surface that control optical changes, on asteroid (101955) Bennu. First …

We present an experimental study on ion irradiation of carbonaceous chondrites, simulating
solar wind irradiation on primitive asteroids, to better constrain the space weathering …

In this work we identify spectral similarities between asteroids and meteorites. Using spectral
features such as absorption bands and spectral curvature, we identify spectral matches …

The carbonaceous asteroid Ryugu has been explored by the Hayabusa2 spacecraft to
elucidate the actual nature of hydrous asteroids. Laboratory analyses revealed that the …

The samples returned from asteroid Ryugu were collected both at its surface and at its
subsurface by Hayabusa2 and can, thus, provide information on the space weathering of C …

Returned samples from Cb-type asteroid (162173) Ryugu exhibit very dark spectra in visible
and near-infrared ranges, generally consistent with the Hayabusa2 observations. A critical …