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Pluto Quick Facts

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Discovered By
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Clyde Tombaugh
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Date of Discovery
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1930
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Average Distance from the Sun
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Metric: 5,906,380,000 km
English: 3,670,050,000 miles
Scientific Notation: 5.90638 x 109 km (39.482 A.U.)
By Comparison: 39.482 x Earth
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Perihelion (closest)
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Metric: 4,436,820,000 km
English: 2,756,902,000 miles
Scientific Notation: 4.43682 x 109 km (29.658 A.U.)
By Comparison: 30.171 x Earth
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Aphelion (farthest)
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Metric: 7,375,930,000 km
English: 4,583,190,000 miles
Scientific Notation: 7.37593 x 109 km (49.305 A.U.)
By Comparison: 48.481 x Earth
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Equatorial Radius
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Metric: 1,151 km
English: 715 miles
Scientific Notation: 1.151 x 103 km
By Comparison: 0.180 x Earth
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Equatorial Circumference
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Metric: 7,232 km
English: 4,494 miles
Scientific Notation: 7.232 x 103 km
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Volume
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Metric: 6,390,000,000 km3
English: 1,530,000,000 mi3
Scientific Notation: 6.39 x 109 km3
By Comparison: 0.0059 x Earth
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Mass
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Metric: 13,000,000,000,000,000,000,000 kg
Scientific Notation: 1.3 x 1022 kg
By Comparison: 0.0022 x Earth
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Density
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Metric: 2 g/cm3
By Comparison: ~ 0.4 x Earth
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Surface Area
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Metric: 16,650,000 km2
English: 6,430,000 square miles
Scientific Notation: 1.665 x 107 km2
By Comparison: 0.033 x Earth
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Equatorial Surface Gravity
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Metric: 0.81 m/s2
English: 2.7 ft/s2
By Comparison: If you weigh 100 pounds on Earth, you would weigh 8 pounds on Pluto.
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Escape Velocity
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Metric: 4,570 km/h
English: 2,840 mph
Scientific Notation: 1,270 m/s
By Comparison: Escape velocity of Earth is 25,022 mph.
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Sidereal Rotation Period (Length of Day)
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6.387 Earth days
153.3 hours
By Comparison: One Earth day is 24 hours.
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Sidereal Orbit Period (Length of Year)
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247.92 Earth years
90,553 Earth days
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Mean Orbit Velocity
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Metric: 17,096 km/h
English: 10,623 mph
Scientific Notation: 4,749.0 m/s
By Comparison: 0.425 x Earth
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Orbital Eccentricity
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0.2488
By Comparison: 14.9 x Earth
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Orbital Inclination to Ecliptic
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17.14 degrees
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Equatorial Inclination to Orbit
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119.61 degrees
By Comparison: 5.10 x Earth
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Orbital Circumference
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Metric: 32,820,000,000 km
English: 20,390,000,000 miles
Scientific Notation: 3.282 x 1010 km
By Comparison: 35.505 x Earth
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Minimum/Maximum Surface Temperature
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Metric: -233/-223 °C
English: -387/-369 °F
Scientific Notation: 40/50 K
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Atmospheric Constituents
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By Comparison: Earth's atmosphere consists mostly of N2 and O2.
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Source: NASA

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