Explore This SectionScienceDawnDawn XMO2 Image...Solar System ResourcesCurated Resource PackagesSolar System Home Dawn XMO2 Image 12November 22, 2016 Kerwan Crater, at 174 miles (280 kilometers) in diameter is the largest crater that NASA's Dawn has discovered on Ceres. A portion of its jagged rim runs from the top left to bottom center of this image.