Recently NASA's Dawn spacecraft achieved orbit around Vesta on July 17. The first photos of the giant asteroid were taken then. The following infographic explains the whole mission of the Dawn spacecraft.
This photo of Vesta was taken by the Dawn spacecraft from the asteroid's orbit on July 17. Vesta is a large asteroid with a mean diameter of about 530 kilometers. It is the second most massive object in the asteroid belt after Ceres and consists of about 9% of all the belt's mass.