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The largest known asteroid, Ceres is 623 miles (1,003 km) in diameter, and orbits roughly 260 million miles (420 million km) from the Sun. Italian astronomer Giuseppe Piazzi discovered Ceres in 1801. Since it was the first asteroid ever discovered, it also carries the designation “1 Ceres.” In 2006, astronomers also classified Ceres as a dwarf planet.



Asteroids February 19, 2016

Radio Programs

Salty Ceres The “salty” surface of an asteroid April 11, 2016

More Dawn at Ceres Looking for water on an asteroid March 4, 2015

Dawn at Ceres A spacecraft makes a second port of call March 3, 2015

Moon and Jupiter Closing in on two dwarf planets January 6, 2015

Asteroid Hunting Pointing the way to two asteroids July 12, 2014

Watery Asteroid Water vapor from a big ball of rock May 1, 2014

Moon and Ceres Peeking beneath the skin of an asteroid September 7, 2012

Featured Images

Dawn image of bright deposits on Ceres

Salty Ceres April 11, 2016

Dawn images of north pole of Ceres

Over the Top April 17, 2015

A full rotation of Ceres as seen by the Dawn mission

Final Approach March 3, 2015

Dawn image of mysterious bright spots on Ceres, February 19, 2015

Bright Mysteries February 26, 2015

Dawn image of Ceres, January 25, 2015

Getting Closer January 28, 2015

Three dwarf planets shown to scale with Earth and Moon

Dwarf Planets January 5, 2015

Artist's concept of water vapor around Ceres; HST image of Ceres

Watery Dwarf May 2, 2014