| Pluto Statistics | |
|---|---|
| Discovered by | Clyde W. Tombaugh |
| Date of discovery | February 18, 1930 |
| Mass (kg) | 1.29e+22 |
| Mass (Earth = 1) | 2.1586e-03 |
| Equatorial radius (km) | 1,160 |
| Equatorial radius (Earth = 1) | 1.8188e-01 |
| Mean density (gm/cm^3) | 2.05 |
| Mean distance from the Sun (km) | 5,913,520,000 |
| Mean distance from the Sun (Earth = 1)) | 39.5294 |
| Rotational period (days) | -6.3872 |
| Orbital period (years) | 248.54 |
| Mean orbital velocity (km/sec) | 4.74 |
| Orbital eccentricity | 0.2482 |
| Tilt of axis (degrees) | 122.52 |
| Orbital inclination (degrees) | 17.148 |
| Equatorial surface gravity (m/sec^2) | 0.4 |
| Equatorial escape velocity (km/sec) | 1.22 |
| Visual geometric albedo | 0.3 |
| Magnitude (Vo) | 15.12 |
Atmospheric composition| 0.3 | |
Pluto Moon Summary
The following table summarizes the radius, mass, distance from the planet center, discoverer and the date of discovery of each of the moons of Pluto:
| Moon | # | Radius (km) |
Mass (kg) |
Distance (km) |
Discoverer | Date |
|---|---|---|---|---|---|---|
| Charon | I | 635 | 1.77e+21 | 19,640 | J. Christy | 1978 |