We use recently compiled position and velocity data for the globular cluster and planetary nebula subsystems in NGC 5128 , the nearby giant elliptical , to search for evidence of past dwarf-satellite accretion events .
Beyond a 10 ^ { \prime } ( \sim 11 kpc ) radius in galactocentric distance , we find tentative evidence for 4 subgroups of globular clusters and 4 subgroups of planetary nebulae .
These each have > 4 members within a search radius of 2 ^ { \prime } and internal velocity dispersion of \lesssim 40 km s ^ { -1 } , typical parameters for a dwarf galaxy .
In addition , 2 of the globular cluster groupings overlap with 2 of the planetary nebulae groupings , and 2 subgroupings also appear to overlap with previously known arc and shell features in the halo light .
Simulation tests of our procedure indicate that the probability of finding false groups due to chance is < 1 \% .