Fig. 10: Estimated heating temperature for Ryugu and ATCCs.
From: Spectrally blue hydrated parent body of asteroid (162173) Ryugu
Peak heating temperatures for meteorites were estimated by refs. 49, 50, 61. The thermal metamorphism stages I–IV are defined by ref. 50. Stage 1: low heating temperature of <570 K (<300 °C), Stage II: heating temperature of 570–770 K (300–500 °C), Stage III: heating temperature of 770–1020 K (500–750 °C), and Stage IV: high temperature of >1020 K (>750 °C). The meteorites with asterisks (*) are classified into CY, typically heated >770 K. Formation temperatures for CM chondrites were estimated by refs. 59,60,61.
