... OBJECTIVES The objectives of Bepi Colombo focus on obtaining the kind of coverage necessary to fill in particular gaps in our knowledge of planet Mercury (Grard et al, 2000). Determining the nature of ... amplitude of libration) essential in ascertaining the structure of the planet. It is anticipated that 15 Gb of data will be collected during the course of the mission. ch02.indd 27ch02.indd 27 ... Neukum, 1988, The cratering record on Mercury and the origin of impacting objects, in Mercury, Copyright 1988, The Arizona Board of Regents. Reprinted by permission of the University of Arizona...