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PLUTO

Pluto

Equatorial Radius1,150 km
Mean Density2.03 g/cm³
Sidereal Rotation6d9h17m
Sidereal Period90,780 days (248.71 years)

Sidereal Rotation=One full rotation(1 Earth day) / Sidereal Period=One revolution around the Sun

Pluto is the last planet in our solar system. It's still not clear as to how Pluto became caught up in gravitational pull of the Sun.