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OSIRIS-REx took these images of Bennu’s southern hemisphere on Jan. 17 from a distance of about 1 mile . The large boulder – fully visible in the middle of the left frame and in partial shadow in lower portion of right frame – is about 165 feet  across. (1.6 km) OSIRIS-REx took these images of Bennu’s southern hemisphere on Jan. 17 from a distance of about 1 mile . The large boulder – fully visible in the middle of the left frame and in partial shadow in lower portion of right frame – is about 165 feet across.