We propose an ecliptic Deep Drilling Field that will discover some 10,000 small and faint Kuiper Belt Objects ( KBOs ) — primitive rocky/icy bodies that orbit at the outside of our Solar System and uniquely record the processes of planetary system formation and evolution .
The primary goals are to measure the KBO size and shape distributions down to 25 km , a size that probes both the early and ongoing evolution of this population .
These goals can be met with around 10 hours total of on-sky time ( five separate fields that are observed for 2.1 hours each ) .
Additional science will result from downstream observations that provide colors and orbit refinement , for a total time request of 40 hours over the ten year LSST main survey .