A close-up of the mysterious bright spots on Ceres. Image credit: NASA / JPL-Caltech / UCLA / MPS / DLR / IDA.
"The new image was taken on May 16, 2015 from a distance of 4,500 miles (7,200 km) and has a resolution of 2,250 feet (700 m) per pixel."
http://www.sci-news.com/space/science-bright-spots-ceres-02831.html