PLUTO.
Small world. A remarkable heart.
SCHEMATIC / NOT A SURFACE MAP
01 /
The measured world
- Mean radius
- 1,188.3 km
- Mean diameter
- 2,376.6 km
- Mass
- 1.303e+22 kg
- Gravity
- 0.62 m/s²
- Escape velocity
- 1.21 km/s
- Rotation period
- 153.29 Earth hours
- Orbital period
- 90,560 Earth days
- Mean distance from Sun
- 39.482 AU
- Reported moons
- 5
Rounded reference values. Rotation is sidereal and differs from the solar day. Giant planets have no solid surface; temperature and gravity use atmospheric reference levels. Some moon counts are omitted because discoveries change them.
Compare with EarthA closer look
New Horizons revealed mountains made of water ice.
Pluto and Charon orbit a center of mass outside Pluto.
Atmosphere
A tenuous nitrogen atmosphere with methane and carbon monoxide.
Discovery
Discovered by Clyde Tombaugh in 1930.