Occator /ɒˈkeɪtər/ is an impact crater located on Ceres that contains "Spot 5", the brightest of the bright spots observed by the Dawn spacecraft. Keck Observatory on Mauna Kea. On 9 December 2015, scientists reported that the bright spots on Ceres, including those in Occator crater, may be related to a type of salt, particularly a form of brine containing magnesium sulfate hexahydrite the spots were also found to be associated with ammonia-rich clays. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Ceres they are named after gods and goddesses of agriculture and vegetation from world mythology.
Image Source. Marker locations are approximate and may not always appear to align with image on map.