Recognised as Planet
Neptune
- Planet
- 1.15× Earth gravity
- Orbits the Sun
Neptune is a planet with a mean radius of 24,622 km and a surface gravity of 11.27 m/s², which is 1.15× Earth's, so a 70 kg person would weigh 80.4 kg there. Escape velocity is 23.56 km/s.
Physical properties
Mass102.413 × 10²⁴ kg≈measured
Mean radius24,622 km≈
Circumference154,705 km
Surface area7,618,272,763 km²
Volume62,525.704 × 10⁹ km³one cubic kilometre is 10⁹ cubic metres
Mean density1,638 kg/m³water is 1,000 kg/m³
Gravity and escape
Surface gravity11.275 m/s²1.148× Earth's
Escape velocity23.563 km/sthe speed needed to leave without further propulsion
A 70 kg person would weigh80.4 kg-forcemass is unchanged; only the weight differs
A 1 kg mass would weigh11.275 newtons
Fall in 1 second5.637 mfrom rest, ignoring any atmosphere
Rotation and orbit
Day length (sidereal)16.11 hours
Orbital period164.805 Earth years
Orbitsthe Sun
Mean distance from the Sun4,515 million km30.18 AU
Light travel time from the Sun251.01 minutes
KindPlanet
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