Planets: Physical Properties

Planet Radius
(km)		 Radius
(Earth = 1)		 Mass 
(kg)		 Mass
(Earth = 1)		 Escape
velocity
(km/sec)
Mercury 2439 0.382 3.3 x 1023 0.0558 4.3
Venus 6052 0.95 4.9 x 1024 0.815 10.3
Earth 6378 1.00 6.0 x 1024 1.00 11.2
Mars 3398 0.53 6.4 x 1023 0.1075 5.0
Jupiter 71,494 11.20 1.9 x 1027 317.83 61
Saturn 60,330 9.42 5.7 x 1026 95.147 35.6
Uranus 25,559 4.01 8.7 x 1025 14.54 22
Neptune 24,750 3.93 1.0 x 1026 17.23 25
Planet Average
density
(kg/m3)		 Composition
(In order of 
abundance)		 Surface
gravity 
(Earth = 1)		 Escape
velocity
(km/sec)		 Rotation 
Period		 Tilt
Mercury 5440 Fe, Ni, Si 0.378 4.3 58.646d 0º
Venus 5240 Si, Fe, Ni 0.903 10.3 244.3d 177º
Earth 5497 Si, Fe, Ni 1.00 11.2 23h56m 23º 27''
Mars 3940 Si, Fe, S 0.379 5.0 24h37m 23º 59''
Jupiter 1340 H, He 2.54 61 9h50.5m 3º 5''
Saturn 690 H, He 1.16 35.6 10h14m 26º 24''
Uranus 1190 H, C, N, O 0.919 22 17h14m 97º 55''
Neptune 1660 H, C, N, O 1.19 25 16h3m 28º 48''