Recognised as Dwarf planet
Ceres
- Dwarf planet
- 0.03× Earth gravity
- Orbits the Sun
Ceres is a dwarf planet with a mean radius of 470 km and a surface gravity of 0.28 m/s², which is 0.03× Earth's, so a 70 kg person would weigh 2 kg there. Escape velocity is 0.52 km/s.
Physical properties
Mass0.0009 × 10²⁴ kg≈measured
Mean radius470 km≈
Circumference2,951 km
Surface area2,771,188 km²
Volume0.4338 × 10⁹ km³one cubic kilometre is 10⁹ cubic metres
Mean density2,163 kg/m³water is 1,000 kg/m³
Gravity and escape
Surface gravity0.284 m/s²0.029× Earth's
Escape velocity0.516 km/sthe speed needed to leave without further propulsion
A 70 kg person would weigh2 kg-forcemass is unchanged; only the weight differs
A 1 kg mass would weigh0.284 newtons
Fall in 1 second0.142 mfrom rest, ignoring any atmosphere
Rotation and orbit
Day length (sidereal)9.074 hours
Orbital period4.6 Earth years
Orbitsthe Sun
Mean distance from the Sun413 million km2.761 AU
Light travel time from the Sun22.96 minutes
KindDwarf planet
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