Encyclopedia of the Solar System 2nd ed

TABLE

3

Physical and Orbital Properties of the Sun, Planets and Dwarf Planets

Equatorial

Density

Rotation

Obliquity

Escape Velocity

Semimajor

Inclination

Period

Name

Mass kg

Radius km

g cm

−

3

Period

degrees

km sec

−^1

Axis AU

Eccentricity

degrees

years

Sun

1.989

×

10

30

695,500

1.41

25.38–34 d.

7.25

∗

617.7

—

—

—

—

Mercury

3.302

×

10

23

2,440

5.43

58.646 d.

0.

4.25

0.38710

0.205631

7.0049

0.2408

Venus

4.869

×

10

24

6,052

5.24

243.018 d.

177.33

10.36

0.72333

0.006773

3.3947

0.6152

Earth

5.974

×

10

24

6,378

5.52

23.934 h.

23.45

11.19

1.00000

0.016710

0.0000

1.0000

Mars

6.419

×

10

23

3,397

3.94

24.623 h.

25.19

5.02

1.52366

0.093412

1.8506

1.8808

Ceres

a

9.47

×

10

20

474

2.1

9.075 h.

—

0.52

2.7665

0.078375

10.5834

Jupiter

1.899

×

10

27

71,492

1.33

9.925 h.

3.08

59.54

5.20336

0.048393

1.3053

11.862

Saturn

5.685

×

10

26

60,268

0.70

10.656 h.

26.73

35.49

9.53707

0.054151

2.4845

29.457

Uranus

8.682

×

10

25

25,559

1.30

17.24 h.

97.92

21.29

19.1913

0.047168

0.7699

84.018

Neptune

1.028

×

10

26

24,764

1.76

16.11 h.

28.80

23.71

30.0690

0.008586

1.7692

164.78

Pluto

a

1.314

×

10

22

1,151

2.0

6.387 d.

119.6

1.23

39.4817

0.248808

17.1417

248.4

Eris

a

1.5

×

10

22

1,200

2.1

—

—

1.29

68.1461

0.432439

43.7408

562.6

∗solor obliquity relative to the ecliptic planeaDwarf planetOrbital data for January 1, 2000

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