Figure 1.

Track identification and radiant point estimation for the 6 January event. Bennu is saturated in the long‐exposure NavCam images used to create this figure, so no surface detail is visible (see the image processing description in Lauretta, Hergenrother, et al., 2019). (a) The NavCam images of the event are registered and differenced. Objects from the first image appear white, and objects from the second image appear black. (b) Particles detected in both images allow us to find a repeated pattern, (c) which is used to make associations that show the particles' apparent motion. (d) When the apparent motion is traced backward, the lines intersect at a common radiant point (red cross) on Bennu.