Samples returned from the carbonaceous (C-type) asteroid 162173 Ryugu by the Hayabusa2 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.

中文翻译：

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样本返回揭示小行星Ryugu是一个富含碳的原始天体

对隼鸟2号任务从碳质（C型）小行星162173 Ryugu返回的样品进行了初步无损分析。它们的暗光谱特征、小密度和没有高温成分意味着它们与原始 CI 族球粒陨石最相似，但与已知的行星材料有一些差异。