SP-474 Voyager 1 and 2 Atlas of Six Saturnian Satellites

 

PART 5

[87] Rhea

 

Diameter

1528km (949) miles)

Density

1.2

Albedo

0.6

Distance from Saturn

527 828 km (327 976 miles)

Orbital period

108 hr, 39 min, 36 sec

Voyager 1 closest approach

73 980 km (45 969 miles)

Voyager 1 pictures used in mapping

25

Voyager 2 closest approach

645 280 km (400 958 miles)

Voyager 2 pictures used in mapping

0

Rhea is heavily cratered, at least on the Saturn-facing hemisphere, where the highest resolution pictures were taken. Light-colored, "wispy" markings characterize the images on the other side of Rhea. The exact nature of these wispy markings is not known, although they may be frost from water vapor escaping from cracksin the surface. These markings are similar to those found on Dione. The location of the markings with respect to the Saturn-facing hemisphere is probably coincidental.

 

[88] Figure 5-1. Resolution of Voyager pictures of Rhea in terms of aerial coverage.

Figure 5-1. Resolution of Voyager pictures of Rhea in terms of aerial coverage.

[89] Figure 5-2. Index of Voyager 1 and 2 pictures used to compile the maps of Rhea. Picture numbers indicate the subspacecraft point at the time the pictures were taken. Contour lines indicate the approximate resolution of available images in kilometers per picture element. (See also fig. 5-1).

Figure 5-2. Index of Voyager 1 and 2 pictures used to compile the maps of Rhea.

[90 - 91] Figure 5-3. Maps of the equatorial region of Rhea on a Mercator projection (part of map I-1484).

Figure 5-3. Maps of the equatorial region of Rhea on a Mercator projection (part of map I-1484).

Figure 5-3. Maps of the equatorial region of Rhea on a Mercator projection (part of map I-1484)- continued

[92] Figure 5-4. Map of the north polar regions of Rhea on a polar stereographic projection (part of map I-1484).

Figure 5-4. Map of the north polar regions of Rhea on a polar stereographic projection (part of map I-1484).

[93] Figure 5-5. Map of the south polar regions of Rhea on a polar stereographic projection.

Figure 5-5. Map of the south polar regions of Rhea on a polar stereographic projection

[94] Figure 5-6. Map of the anti-Saturn-facing hemisphere of Rhea on a Lambert azimuthal equal-area projection. Nomenclature is not shown, to avoid obscuring detail. Scale 1:10 000 000 (1 mm2 = 100 km2; 1 in2 = ~25 000 mi2).

Figure 5-6. Map of the anti-Saturn-facing hemisphere of Rhea on a Lambert azimuthal equal-area projection.

[95] Figure 5-7. Map of the Saturn-facing hemisphere of Rhea on a Lambert azimuthal equal-area projection. Nomenclature is not shown, to avoid obscuring detail. Scale 1:10 000 000 (1 mm2 = 100 km2; 1 in2 = ~25 000 mi2).

Figure 5-7. Map of the Saturn-facing hemisphere of Rhea on a Lambert azimuthal equal-area projection.

[96] Figure 5-8. Picno 0011S1-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0011S1-002

FDS

34884.07

Range, km

2 428 265

Subspacecraft latitude/longitude, degrees

6/193

Subsolar latitude/longitude, degrees

3/207

Resolution, km/pixel

22

Filter size, pixels

101 x 101

Filter size, km

2268

Scale

1:15 000 000

Figure 5-8. Picno 0011S1-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[97] Figure 5-9. Picno 1156S1-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1156S1-002

FDS

34903.12

Range, km

1 849 831

Subspacecraft latitude/longitude, degrees

4/254

Subsolar latitude/longitude, degrees

3/257

Resolution, km/pixel

17

Filter size, pixels

101 x 101

Filter size, km

1728

Scale

1:15 000 000

Figure 5-9. Picno 1156S1-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[98] Figure 5-10. Picno 0055S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0055S1-001

FDS

34914.51

Range, km

1 586 518

Subspacecraft latitude/longitude, degrees

1/288

Subsolar latitude/longitude, degrees

3/288

Resolution, km/pixel

14

Filter size, pixels

101 x 101

Filter size, km

1482

Scale

1:15 000 000

Figure 5-10. Picno 0055S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[99] Figure 5-11. Picno 0696S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0696S1-001

FDS

34925.32

Range, km

1 297 847

Subspacecraft latitude/longitude, degrees

-1/315

Subsolar latitude/longitude, degrees

3/317

Resolution, km/pixel

12

Filter size, pixels

101 x 101

Filter size, km

1212

Scale

1:15 000 000

Figure 5-11. Picno 0696S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[100] Figure 5-12. Picno 1558S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1558S1-001

FDS

34939.54

Range, km

719 410

Subspacecraft latitude/longitude, degrees

-10/341

Subsolar latitude/longitude, degrees

3/355

Resolution, km/pixel

6

Filter size, pixels

101 x 101

Filter size, km

672

Scale

1:15 000 000

Figure 5-12. Picno 1558S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[101] Figure 5-13. Picno 0387S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0387S1+000

FDS

34950.23

Range, km

121 017

Subspacecraft latitude/longitude, degrees

9/9

Subsolar latitude/longitude, degrees

3/22

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

113

Scale

1:15 000 000

Figure 5-13. Picno 0387S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[102] Figure 5-14. Picno 0389S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0389S1+000

FDS

34950.25

Range, km

119 645

Subspacecraft latitude/longitude, degrees

9/9

Subsolar latitude/longitude, degrees

3/22

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

112

Scale

1:15 000 000

Figure 5-14. Picno 0389S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[103] Figure 5-15. Picno 0393S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0393S1+000

FDS

34950.29

Range, km

116 928

Subspacecraft latitude/longitude, degrees

10/

Subsolar latitude/longitude, degrees

3/22

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

109

Scale

1:15 000 000

Figure 5-15. Picno 0393S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[104] Figure 5-16. Picno 0401S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0401S1+000

FDS

34950.37

Range, km

111 633

Subspacecraft latitude/longitude, degrees

12/10

Subsolar latitude/longitude, degrees

3/23

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

104

Scale

1:15 000 000

Figure 5-16. Picno 0401S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[105] Figure 5-17. Picno 0405S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0405S1+000

FDS

34950.41

Range, km

109 056

Subspacecraft latitude/longitude, degrees

14/11

Subsolar latitude/longitude, degrees

3/23

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

102

Scale

1:15 000 000

Figure 5-17. Picno 0405S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[106] Figure 5-18. Picno 0411S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0411S1+000

FDS

34950.47

Range, km

105 294

Subspacecraft latitude/longitude, degrees

15/12

Subsolar latitude/longitude, degrees

3/23

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

98

Scale

1:15 000 000

Figure 5-18. Picno 0411S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[107] Figure 5-19. Picno 0417S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0417S1+000

FDS

34950.53

Range, km

101 664

Subspacecraft latitude/longitude, degrees

17/13

Subsolar latitude/longitude, degrees

3/24

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

95

Scale

1:15 000 000

Figure 5-19. Picno 0417S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[108] Figure 5-20. Picno 0419S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0419S1+000

FDS

34950.55

Range, km

100 486

Subspacecraft latitude/longitude, degrees

18/13

Subsolar latitude/longitude, degrees

3/24

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

94

Scale

1:15 000 000

Figure 5-20. Picno 0419S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[109] Figure 5-21. Picno 0517S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0517S1+000

FDS

34952.33

Range, km

75 746

Subspacecraft latitude/longitude, degrees

67/56

Subsolar latitude/longitude, degrees

3/28

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

71

Scale

1:15 000 000

Figure 5-21. Picno 0517S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[110] Figure 5-22. Picno 0533S1+000.(a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0533S1+000

FDS

34952.49

Range, km

79 796

Subspacecraft latitude/longitude, degrees

72/80

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

74

Scale

1:15 000 000

Figure 5-22. Picno 0533S1+000.(a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[111] Figure 5-23. Picno 0535S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0535S1+000

FDS

34952.051

Range, km

80 542

Subspacecraft latitude/longitude, degrees

73/84

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

75

Scale

1:15 000 000

Figure 5-23. Picno 0535S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[112] Figure 5-24. Picno 0537S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0537S1+000

FDS

34952.53

Range, km

81 138

Subspacecraft latitude/longitude, degrees

73/88

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

76

Scale

1:15 000 000

Figure 5-24. Picno 0537S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[113] Figure 5-25. Picno 0539S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0539S1+000

FDS

34952.55

Range, km

81 854

Subspacecraft latitude/longitude, degrees

73/92

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

76

Scale

1:15 000 000

Figure 5-25. Picno 0539S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[114] Figure 5-26. Picno 0541S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0541S1+000

FDS

34952.57

Range, km

82 599

Subspacecraft latitude/longitude, degrees

74/96

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

77

Scale

1:15 000 000

Figure 5-26. Picno 0541S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[115] Figure 5-27. Picno 0543S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0543S1+000

FDS

34952.59

Range, km

83 373

Subspacecraft latitude/longitude, degrees

74/99

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

78

Scale

1:15 000 000

Figure 5-27. Picno 0543S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[116] Figure 5-28. Picno 0545S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0545S1+000

FDS

34953.01

Range, km

84 174

Subspacecraft latitude/longitude, degrees

74/103

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

78

Scale

1:15 000 000

Figure 5-28. Picno 0545S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[117] Figure 5-29. Picno 0547S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0547S1+000

FDS

34953.03

Range, km

85 001

Subspacecraft latitude/longitude, degrees

74/107

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

79

Scale

1:15 000 000

Figure 5-29. Picno 0547S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[118] Figure 5-30. Picno 0549S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0549S1+000

FDS

34953.05

Range, km

85 855

Subspacecraft latitude/longitude, degrees

74/111

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

80

Scale

1:15 000 000

Figure 5-30. Picno 0549S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[119] Figure 5-31. Picno 0551S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0551S1+000

FDS

34953.07

Range, km

86 734

Subspacecraft latitude/longitude, degrees

73/114

Subsolar latitude/longitude, degrees

3/29

Resolution, km/pixel

1

Filter size, pixels

101 x 101

Filter size, km

81

Scale

1:15 000 000

Figure 5-31. Picno 0551S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

[120] Figure 5-32. Picno 1152S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1152S1+000

FDS

34963.08

Range, km

579 771

Subspacecraft latitude/longitude, degrees

32/208

Subsolar latitude/longitude, degrees

3/56

Resolution, km/pixel

5

Filter size, pixels

101 x 101

Filter size, km

542

Scale

1:15 000 000

Figure 5-32. Picno 1152S1+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

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