Planets Solar System Comparative Data:

(Extracted from: http://www.windows.ucar.edu/tour/link=/our_solar_system/planets_table.html)

 

Mercury

Venus

Earth

Mars

Jupiter

Saturn

Uranus

Neptune

diameter (Earth=1)

0.382

0.949

1

0.532

11.209

9.44

4.007

3.883

Diameter (km)

4,878

12,104

12,756

6,787

142,800

120,000

51,118

49,528

mass (Earth=1)

0.055

0.815

1

0.107

318

95

15

17

mean distance from Sun (AU)

0.39

0.72

1

1.52

5.20

9.54

19.18

30.06

orbital period (Earth years)

0.24

0.62

1

1.88

11.86

29.46

84.01

164.8

eccentricity (e)

0.2056

0.0068

0.0167

0.0934

0.0483

0.0560

0.0461

0.0097

mean orbital velocity (km/sec)

47.89

35.03

29.79

24.13

13.06

9.64

6.81

5.43

rotation period (in Earth days)

58.65

-243 #

1

1.03

0.41

0.44

-0.72 #

0.72

inclination of axis (degrees)

0.0

177.4

23.45

23.98

3.08

26.73

97.92

28.8

mean temp at surface (C)

-180 to 430

465

-89 to 58

-82 to 0

-150

-170

-200

-210

gravity at equator (Earth=1)

0.38

0.9

1

0.38

2.64

0.93

0.89

1.12

escape velocity (km/sec)

4.25

10.36

11.18

5.02

59.54

35.49

21.29

23.71

mean density (water=1)

5.43

5.25

5.52

3.93

1.33

0.71

1.24

1.67

atmospheric composition

none

CO2

N2+O2

CO2

H2+He

H2+He

H2+He

H2+He

rings

no

no

no

no

yes

yes

yes

yes

# Negative values of rotation period indicate that the planet rotates in the direction opposite to that in which it orbits the Sun. This is called retrograde rotation.

The orbital eccentricity (e) is a number which measures how elliptical orbits are. If e=0, the orbit is a circle. Most planets have eccentricities close to 0, so they have orbits which are nearly circular.

 

1