Velocity km/s

Object

Mass kg

Orbit

Escape

Temp K

Composition

Mercury

3.30e23

47.4

4.25

85-700

iron core, silicate mantle

Venus

4.87e24

35.0

10.4

737

?

Asteroids

3.xxe19

16-20

< 0.51

85-270

some iron, silicates

Saturn

5.68e26

9.7

35.5

84-134

H, He, some core rock

Titan

1.34e23

5.6

2.6

94

H₂O and rock

Uranus

8.68e25

6.8

21.3

47-76

H, He, 2.3% methane

Neptune

1.02e26

5.4

23.5

55-72

H, He, trace methane

Triton

2.14e22

4.4

1.5

38

H₂O and rock

Element

ppm by weight

Oxygen

10,000

Carbon

4,600

Iron

1,000

Silicon

650

Element

e-8 Ω-m, imprecise estimates

Graph

300 K

TC /K

≃ 80 K

73 K

53 K

60 K

Silver

1.6

0.33

0.28

0.15

0.19

Copper

1.7

0.004

0.11

Aluminum

2.8

0.004

0.28

0.33

0.20

0.22

Iron

10.0

0.005

0.74

0.62

0.27

0.35