10423

Pluto



Discovered By
Clyde Tombaugh

Date of Discovery
1930

Distance from the Sun
(Semimajor axis of orbit)
5,906,376,200 km
39.48168677 A.U.
(Note: Pluto's highly elliptical orbit around our Sun varies from 29.6 AU to 49.6 AU - averaging 39.6 AU.)

Mean Equatorial Radius
1,180 km
(0.180 of Earth's radius)

Volume
0.005 (Earth = 1)

Mass
0.013 × 1027 g

Density
2.0 gm/cm3

Surface Gravity
60 cm/s2

Escape Velocity
1.2 km/s

Sidereal Rotation Period (Earth days)
-6.38718 (retrograde)

Sidereal Orbit Period
247.92065 sidereal years

Mean Orbit Velocity
4.7490 km/s

Orbit Eccentricity
0.24880766

Orbit Inclination
17.14175 degrees

Equatorial Inclination
119.61 degrees

Mean Surface Temperature
40 K

Natural Satellites
1. Charon