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 0
Venus 5240 Si, Fe, Ni 0.903 10.3 244.3d 177
Earth 5497 Si, Fe, Ni 1.00 11.2 23h56m 23 27''
Mars 3940 Si, Fe, S 0.379 5.0 24h37m 23 59''
Jupiter 1340 H, He 2.54 61 9h50.5m 3 5''
Saturn 690 H, He 1.16 35.6 10h14m 26 24''
Uranus 1190 H, C, N, O 0.919 22 17h14m 97 55''
Neptune 1660 H, C, N, O 1.19 25 16h3m 28 48''