Dawn used its ion engine in April and May to descend to an orbit creatively known as extended mission orbit 6 (XMO6). XMO7 will range in altitude from 22 miles (35 kilometers) to 2,500 miles (4,000 kilometers). Not only are we limited in our ability to predict how much hydrazine each activity will require but our measurement of how much hydrazine Dawn has remaining is imperfect too. So, it is not possible to predict exactly how much hydrazine Dawn will need nor exactly how much it has. Dantu is 78 miles (126 kilometers) wide, and we last presented a view of a segment of it in October.