Fig. 2. Fe isotopic anomalies of returned samples from Cb-type asteroid (162173) Ryugu and carbonaceous chondrites (Table 1).

Ryugu samples and CI chondrites have identical μ⁵⁴Fe values, which are distinct from all other carbonaceous chondrite groups [CM, CV, CO, CR, and Ung (ungrouped)]. The open triangle is the CI chondrite average from Schiller et al. (22).