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. Author manuscript; available in PMC: 2020 Jul 20.
Published in final edited form as: Science. 2019 Mar 19;364(6437):252. doi: 10.1126/science.aaw0422

Fig. 2. Craters on Ryugu.

Fig. 2.

(A) The largest crater, Urashima (290 m in diameter, 8.3°S, 92.5°E), on Ryugu (hyb2_onc_20180720_071230_tvf_l2b). Wall slumping is indicated with yellow arrows. (B) Kolobok crater (240 m, 1.5°S, 333.5°E), which has a deep floor, bowl-like shape, and a raised rim (hyb2_onc_20180720_100057_tvf_l2b). (C) LIDAR profiles of Urashima crater. Wall slumping is indicated with blue arrows. (D) LIDAR profiles of Kolobok crater. (E) CSFD on Ryugu and Itokawa and empirical saturation and crater production curves (54) with (orange) and without (green) dry-soil cohesion. Black crosses in (F) represent Itokawa crater candidates (11). Red and blue points indicate Ryugu craters with different crater CLs. (F) An R-plot (the CSFD normalized by D−2, where D is diameter) for Ryugu (circles and squares) and Itokawa (crosses). The relative crater frequency R is defined as the differential crater frequency in a diameter range between D/k and kD, divided by D3, where k is 21/4. Saturation and crater production curves are the same as in (E). Ma, million years.