Fig. 1: Relative abundance of noble gases in the analysed Ryugu samples.

The elemental ratios are normalised to ³⁶Ar. Solar wind (SW) and planetary (P1) compositions³ are shown for reference. The data points for all samples fall between SW and P1 compositions except for the ³⁶Ar/¹³²Xe ratio in C0209. Source data are provided in Table 1.