Ceres is the closest dwarf planet to the Sun. It is located in the asteroid belt, making it the only dwarf planet in the inner solar system. Ceres is the smallest of the bodies current classified as dwarf planets.
Mass: 943,000,000,000 billion kg (very tiny--even smaller than a continent on Earth)
Moons: none
Orbit Distance: 413,700,000 km
Orbit Period: 4.60 Earth years
Surface Temperature: -105°C (This is incredibly cold--much colder than anywhere on Earth!)
Discovery Date: January 1st, 1801
Discovered By: Giuseppe Piazzi
Ceres was the first object considered to be an asteroid:
Italian astronomer Giuseppe Piazzi discovered and named Ceres in early 1801. Though he classified it as a planet, Ceres is now classified as a dwarf planet which accounts for nearly 1/3 of the asteroid belt’s mass.
The first visit to Ceres is due in 2015:
NASA’s Dawn spacecraft is making its way to Ceres from the asteroid Vesta since September 2012. There is high interest in this mission since Ceres is one possible destination for human colonisation given its abundance of ice, water, and minerals.
Links:
http://www.space.com/22891-ceres-dwarf-planet.html
Videos: