Encyclopedia of the Solar System 2nd ed

TABLE

1

Properties of the Main Planetary Satellites (

Continued

)

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

S7 Hyperion

1,481

21.28

0.104

0.4

180

×

140

×

112

0.60

0.3

Bond and

Lassell

1848

S8 Iapetus

3,561

79.33

0.028

14.7

718

1.09

0.4–0.08

Cassini

1671

S9 Phoebe

12,952

550.4R

0.163

150

107

1.6

0.06

Pickering

1898

Uranus

U6 Cordelia

49.7

0.33

0.0005

0.14

13

Voyager 2

1986

U7 Ophelia

53.8

0.38

0.010

0.09

15

Voyager 2

1986

U8 Bianca

59.2

0.43

0.001

0.16

21

Voyager 2

1986

U9 Cressida

61.8

0.46

0.0002

0.04

31

∼

0.04

Voyager 2

1986

U10 Desdemona

62.7

0.47

0.0002

0.16

27

∼

0.04

Voyager 2

1986

U11 Juliet

64.4

0.49

0.0006

0.06

42

∼

0.06

Voyager 2

1986

U12 Portia

66.1

0.51

0.0002

0.09

54

∼

0.09

Voyager 2

1986

U13 Rosalind

69.9

0.56

0.00009

0.28

27

∼

0.04

Voyager 2

1986

U14 Belinda

75.3

0.62

0.0001

0.03

33

Voyager 2

1986

U15 Puck

86.0

0.76

0.00005

0.31

77

0.07

Voyager 2

1985

U5 Miranda

130

1.41

0.003

3.4

236

1.2

0.35

Kuiper

1948

U1 Ariel

191

2.52

0.003

0.0

579

1.6

0.36

Lassell

1851

U2 Umbriel

266

4.14

0.005

0.0

585

1.5

0.20

Lassell

1851

U3 Titania

436

8.71

0.002

0.0

789

1.7

0.30

Herschel

1787

U4 Oberon

583

13.46

0.001

0.0

761

1.6

0.22

Herschel

1787

U16 Caliban

7775

654

0.2

146

20?

Gladman et al.

1997

U17 Sycorax

8846

795

0.34

154

40?

Gladman et al.

1997

Neptune

N8 Naiad

48.2

0.29

0.000

0.0

29

Voyager 2

1989

N7 Thalassa

50.1

0.31

0.0002

4.5

40

Voyager 2

1989

N5 Despina

52.5

0.33

0.0001

0.0

74

0.05

Voyager 2

1989

N6 Galatea

62.0

0.43

0.0001

0.0

79

Voyager 2

1989

N4 Larissa

73.6

0.55

0.000

0.0

104

×

89

0.06

Voyager 2

1989

N3 Proteus

117.6

1.12

0.0004

0.0

208

0.06

Voyager 2

1989

N1 Triton

354.8

5.87R

0.000015

157

1,353

2.08

0.73

Lassell

1846

N2 Nereid

5,513

360.1

0.751

29

170

0.16

Kuiper

1949

See web-based sources in the bibliography for additional information.

368