BRIEF SURVEY OF PLUTO
Distance from Sun
Perihelion (closest)	4,436,820,000 km (2,756,912,000 mi)
Aphelion	7,375,930,000 km (4,583,190,000 mi)
Distance from Earth
Minimum	4,293,700,000 km (2,668,000,000 mi)
Maximum	7,533,300,000 km (4,681,000,000 mi)
Period of revolution	247.92 earth years
Rotation period (sidereal day)	6.387 earth days
Eccentricity of orbit	0.249
Inclination of orbit	17.14°
Mass (earth = 1)	0.0022
Radius at equator	1151 km (715 mi)
Mean density (earth = 1)	0.4 (est.)
Surface gravity (earth = 1)	0.08
Atmospheric pressure at surface (earth = 1)	>3 microbars (est.)
Surface temperature (min./max)	-233° to -223° C (-387° to -369° F)
Known natural satellites	1