Sequential images of Ryugu captured by the Optical Navigation Camera - Wide angle (ONC-W1). The images were taken on October 15, 2018 between 22:45 ~ 22:53 JST. The altitude of the spacecraft when the first image was taken is about 240m, the lowest altitude image is at about 47m at 22:45 JST and the altitude in the final image is about 370m. (Animated GIF)
(Image credit ※: JAXA, University of Tokyo, Kochi University, Rikkyo University, Nagoya University, Chiba Institute of Technology, Meiji University, University of Aizu, AIST.)

Source: Hayabusa2 Project Site