On November 1, 2023, Lucy passed within 431 km of the smallest Main Belt asteroid yet to be encountered by a spacecraft, (152830) Dinkinesh. This target was a late addition to the Lucy mission \cite{Levison+2021} and was intended primarily as an in-flight test of the Terminal Tracking system, an autonomous range-finding and tracking system that is a critical component of Lucy’s operations \citep{Olkin+2021}. Data obtained by Lucy’s instruments during the encounter revealed Dinkinesh, which has an effective diameter of only ~720 m, to be an unexpectedly complex system. Of particular note is the presence of a substantial equatorial ridge and a longitudinal trough, and the discovery of the first confirmed contact binary satellite, now named (152830) Dinkinesh I Selam. Selam consists of two near-equal sized lobes with diameters of ~210 m and ~230 m. It orbits Dinkinesh at a distance of ~3.1 km with an orbital period of about 53 hr, and is tidally locked. Dinkinesh's ridge and trough are likely the result of mass failure resulting from YORP torques, and the reaccretion of material. This event is probably linked to the formation of Selam.