11. Pluto

11. Pluto

Courtesy of NASA, ESA, H. Weaver (JHU/APL), A. Stern (SwRI), and the Hubble Space Telescope Pluto Companion Search Team

http://www.spacetelescope.org/images/opo0519c/


Dwarf Planet

Diameter : 2,302 km
Orbit Radius: 29.7—49.3 AU
Orbital Period: 247.92 years
Rotational Period: -6.39 days (retrograde)
Average Temperature: -230°C
Max/Min Temperature: -220°/-230°C
Composition: Rocky/Icy
Number of Moons: 4
Atmosphere: Mostly N2; some CO and CH4
Atmospheric Pressure: 0 bars
Gravity (Earth=1): 0.06
Mass (Earth=1): 0.002
Magnetic Field : Unknown