Dwarf Planet
Ceres
TypeDwarf Planet
Mass9.39 × 10²⁰ kg
Diameter939 km
Orbital Radius414 million km
Orbital Period1,682 days
Rotation Period9.07 hours
Known Moons0
Surface Gravity0.28 m/s²
Average Temp-106 °C
AtmospherePossible transient water vapor
Discovered ByGiuseppe Piazzi
Discovery Year1801
About Ceres
The largest object in the asteroid belt. Was classified as a planet when first discovered, then an asteroid, then a dwarf planet. Has bright spots on its surface (Occator Crater) identified as sodium carbonate from subsurface brine. Dawn spacecraft orbited it from 2015-2018.
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