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1 Ceres

Minor Planet Designation1 Ceres
Asteroid GroupMain Asteroid Belt
Asteroid FamilyNot applicable
Composition ClassG-type (carbonaceous)
Orbital Period4 years, 223 days
Distance from the SunSemi-Major Axis: 414,010,000 km (2.77 AU)
Perihelion: 382,619,000 km (2.56 AU)
Aphelion: 445,401,000 km (2.98 AU)
Diameter (Mean)924.4 kilometres
NotesThe rocky surface of Ceres is heavily cratered, with a small number of distinctive bright spots standing out against the darker surface rocks.

The largest of the asteroids by far, Ceres' diameter is nonetheless less than 1,000 km, about a third of the diameter of Pluto.

Western hemisphere of Ceres, centred on longitude 90° W

Eastern hemisphere of Ceres, centred on longitude 90° E

Ahuna Mons

The relatively bright rise shown in this view of Ceres is Ahuna Mons, a cryovolcano rising nearly five kilometres above the surrounding terrain. This is the only such feature to be found on the asteroid.

The orbit of Ceres

Ceres' orbit through the Asteroid Belt takes nearly five years to complete, and during that period it passes from the inner regions of the Belt to its outer edge and back.


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