Planetary Fact Sheet
Metric

David R. Williams, NASA
December 23, 2016



   MERCURY   VENUS   EARTH   MOON   MARS   JUPITER   SATURN   URANUS   NEPTUNE   PLUTO 
Mass (1024kg) 0.330 4.87 5.97 0.073 0.642 1898 568 86.8 102 0.0146
Diameter (km) 4879 12,104 12,756 3475 6792 142,984 120,536 51,118 49,528 2370
Density (kg/m3) 5427 5243 5514 3340 3933 1326 687 1271 1638 2095
Gravity (m/s2) 3.7 8.9 9.8 1.6 3.7 23.1 9.0 8.7 11.0 0.7
Escape Velocity (km/s) 4.3 10.4 11.2 2.4 5.0 59.5 35.5 21.3 23.5 1.3
Rotation Period (hours) 1407.6 -5832.5 23.9 655.7 24.6 9.9 10.7 -17.2 16.1 -153.3
Length of Day (hours) 4222.6 2802.0 24.0 708.7 24.7 9.9 10.7 17.2 16.1 153.3
Distance from Sun (106 km) 57.9 108.2 149.6 0.384* 227.9 778.6 1433.5 2872.5 4495.1 5906.4
Perihelion (106 km) 46.0 107.5 147.1 0.363* 206.6 740.5 1352.6 2741.3 4444.5 4436.8
Aphelion (106 km) 69.8 108.9 152.1 0.406* 249.2 816.6 1514.5 3003.6 4545.7 7375.9
Orbital Period (days) 88.0 224.7 365.2 27.3 687.0 4331 10,747 30,589 59,800 90,560
Orbital Velocity (km/s) 47.4 35.0 29.8 1.0 24.1 13.1 9.7 6.8 5.4 4.7
Orbital Inclination (degrees) 7.0 3.4 0.0 5.1 1.9 1.3 2.5 0.8 1.8 17.2
Orbital Eccentricity 0.205 0.007 0.017 0.055 0.094 0.049 0.057 0.046 0.011 0.244
Obliquity to Orbit (degrees) 0.034 177.4 23.4 6.7 25.2 3.1 26.7 97.8 28.3 122.5
Mean Temperature (C) 167 464 15 -20 -65 -110 -140 -195 -200 -225
Surface Pressure (bars) 0 92 1 0 0.01 Unknown* Unknown* Unknown* Unknown* 0.00001
Number of Moons 0 0 1 0 2 67 62 27 14 5
Ring System? No No No No No Yes Yes Yes Yes No
Global Magnetic Field? Yes No Yes No No Yes Yes Yes Yes Unknown
   MERCURY   VENUS   EARTH   MOON   MARS   JUPITER   SATURN   URANUS   NEPTUNE   PLUTO 

* - See the Fact Sheet Notes.

Planetary Fact Sheet in U.S. Units

Planetary Fact Sheet - Values compared to Earth

Index of Planetary Fact Sheets - More detailed fact sheets for each planet

Notes on the Fact Sheets - Explanations of the values and headings in the fact sheet

Schoolyard Solar System - Demonstration scale model of the solar system for the classroom

NASA
Author/Curator:
Dr. David R. Williams, [email protected]
NSSDCA, Mail Code 690.1
NASA Goddard Space Flight Center
Greenbelt, MD 20771
+1-301-286-1258

NASA Official: Dr. David R. Williams, [email protected]
Last Updated: 07 June 2017, DRW



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Source: NASA / Dr. David R. Williams

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