Encyclopedia of the Solar System 2nd ed

TABLE

1

Properties of the Main Planetary Satellites

Distance

Revolution

from

Period

Orbital

Visual

Primary

(days)

Orbital

Inclination

Radius

Density

Geometric

Year

Satellite

(10

3

km)

R

=

retrograde

Eccentricity

(degrees)

(km)

(g/cm

3 )

Albedo

Discoverer

Discovered

Mars

M1 Phobos

9.38

0.32

0.018

1.0

14

×

10

1.9

0.05

Hall

1877

M2 Deimos

23.50

1.26

0.002

2.8

8

×

6

2.1

0.05

Hall

1877

Jupiter

J15 Adrastea

128

0.30

0.0

0.0

10

<

0.1

Voyager

1979

J16 Metis

129

0.30

0.0

0.0

20

<

0.1

Voyager

1979

J5 Amalthea

181

0.49

0.003

0.4

131

×

73

×

67

1.0

0.05

Barnard

1892

J14 Thebe

222

0.67

0.015

0.8

50

<

0.1

Voyager

1979

J1 Io

422

1.77

0.004

.04

1,818

3.53

0.6

Galileo

1610

J2 Europa

671

3.55

0.010

0.5

1,560

2.99

0.6

Galileo

1610

J3 Ganymede

1,070

7.15

0.002

0.2

2,634

1.94

0.4

Galileo

1610

J4 Callisto

1,883

16.69

0.007

0.5

2,409

1.85

0.2

Galileo

1610

J13 Leda

11,094

239

0.148

26.7

5

Kowal

1974

J6 Himalia

11,480

251

0.163

27.6

85

0.03

Perrine

1904

J10 Lysithea

11,720

259

0.107

29.0

12

Nicholson

1938

J7 Elara

11,737

260

0.207

24.8

40

0.03

Perine

1904

J12 Ananke

21,200

631R

0.17

147

10

Nicholson

1951

J11 Carme

22,600

692R

0.21

163

15

Nicholson

1938

J8 Pasiphae

23,500

735R

0.38

145

18

Melotte

1908

J9 Sinope

23,700

758R

0.28

153

14

Nicholson

1914

Saturn

S18 Pan

134

0.57

0.0

0.0

10

—

—

Showalter

1990

S15 Atlas

138

0.60

0.000

0.0

19

×

17

×

14

0.4

Voyager

1980

S16 Prometheus

139

0.61

0.002

0.0

74

×

50

×

34

0.6

Voyager

1980

S17 Pandora

142

0.63

0.004

0.05

55

×

44

×

31

0.6

Voyager

1980

S10 Janus

151

0.69

0.007

0.14

97

×

95

×

77

0.65

0.6

Dollfus

1966

S11 Epimetheus

151

0.69

0.009

0.34

69

×

55

×

55

0.65

0.5

Fountain and

Larson

1978

S1 Mimas

186

0.94

0.020

1.5

199

1.15

0.8

Herschel

1789

S2 Enceladus

238

1.37

0.004

0.0

252

1.61

1.4

Herschel

1789

S3 Tethys

295

1.89

0.000

1.1

536

0.96

0.8

Cassini

1684

S14 Calypso

295

1.89

0.0

1.1

15

×

8

×

8

1.0

0.6

Pascu et al.

1980

S13 Telesto

295

1.89

0.0

1.0

15

×

12

×

8

1.0

0.9

Smith et al.

1980

S4 Dione

377

2.74

0.002

0.02

563

1.47

0.55

Cassini

1684

S12 Helene

377

2.74

0.005

0.15

16

1.5

0.5

Laques and

Lecacheux

1980

S5 Rhea

527

4.52

0.001

0.35

734

1.23

0.65

Cassini

1672

S6 Titan

1,222

15.94

0.029

0.33

2,575

1.88

0.2

Huygens

1655

(Continued

)

367