Ceres is the smallest dwarf planet located in the asteroid belt between Mars and Jupiter. It was discovered in 1801 and named after the Roman goddess of harvest. Ceres orbits the sun every 4 years and 2 months, and its days last 9.5 hours. With a diameter of 950 km, Ceres is covered in craters and has a rocky core surrounded by ice, with surface temperatures never exceeding 30 degrees Celsius.