This set of 16 images was taken the OSIRIS-REx spacecraft during its approach on the asteroid Bennu during the last half of October. From the 12th through the 29th, the long-range PolyCam camera took one optical navigation image per day, except on the 16th and 17th when PolyCam was not scheduled to take images. The spacecraft was roughly 44,000 km from Bennu when the first image was taken. The last image was taken from a distance of around 320 km.
Image Credits: NASA