part3

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

PART 3

[47] Tethys

Diameter	1048 km (651) miles)
Density	1.0
Albedo	0.8
Distance from Saturn	296 563 km (184 275 miles)
Orbital period	45 hr, 45 min, 43 sec
Voyager 1 closest approach	415 670 km (258 285 miles)
Voyager 1 pictures used in mapping	6
Voyager 2 closest approach	93 000 km (57 787 miles)
Voyager 2 pictures used in mapping	10

The most disctinctive feature visible in Voyager pictures of Tethys is a very large valley 50 to 100 km wide that extends nearly two-thirds of the way around the satellite. A huge crater is also visible at 30° N latitude and 130° W longitude. This crater is about 500 km in diameter (about half the diameter of Tethys).

[48] Figure 3-1. Resolution of Voyager pictures of Tethys in tems of aerial coverage.

[49] Figure 3-2. Index of Voyager 1 and 2 pictures used to compile the maps of Tethys. 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. 3-1.)

[50] Figure 3-3. Map of the equatorial region of Tethys on a Mercator projection (part of map I-1487.)

[51] Figure 3-4. Maps of the polar regions of Tethys on polar stereographic projections (part of map I-1487). (a) North polar region. (b) South polar region.

[52] Figure 3-5. Maps of Tethys on Lambert azimuthal equal-area projections. Nomenclature is not shown, to avoid obscuring detail. Scale: 1:10 000 000 (1 mm² = 100 km²; 1 in² = ~25 000 mi²). (a) Anti-Saturn-facing hemisphere. (b) Saturn-facing hemisphere.

[53] Figure 3-6. Picno 1002S1-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1002S1-002

FDS

34900.38

Range, km

1 993 641

Subspacecraft latitude/longitude, degrees

4/267

Subsolar latitude/longitude, degrees

4/248

Resolution, km/pixel

18

Filter size, pixels

13 x 13

Filter size, km

239

Scale

1:10 000 000

[54] Figure 3-7. Picno 1136S1-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1136S1-002

FDS

34902.52

Range, km

1 953 077

Subspacecraft latitude/longitude, degrees

4/252

Subsolar latitude/longitude, degrees

4/262

Resolution, km/pixel

18

Filter size, pixels

15 x 15

Filter size, km

271

Scale

1:10 000 000

[55] Figure 3-8. Picno 1414S1-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1414S1-002

FDS

34907.30

Range, km

1 884 331

Subspacecraft latitude/longitude, degrees

3/282

Subsolar latitude/longitude, degrees

4/292

Resolution, km/pixel

17

Filter size, pixels

11 x 11

Filter size, km

191

Scale

1:10 000 000

[56] Figure 3-9. Picno 0742S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0742S1-001

FDS

34926.18

Range, km

1 241 268

Subspacecraft latitude/longitude, degrees

-1/21

Subsolar latitude/longitude, degrees

4/51

Resolution, km/pixel

11

Filter size, pixels

17 x 17

Filter size, km

195

Scale

1:10 000 000

[57] Figure 3-10. Picno 1390S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1390S1-001

FDS

34937.06

Range, km

576 130

Subspacecraft latitude/longitude, degrees

-11/50

Subsolar latitude/longitude, degrees

4/120

Resolution, km/pixel

5

Filter size, pixels

17 x 17

Filter size, km

90

Scale

1:10 000 000

[58] Figure 3-11. Picno 1394S1-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1394S1-001

FDS

34937.10

Range, km

572 526

Subspacecraft latitude/longitude, degrees

-12/50

Subsolar latitude/longitude, degrees

4/120

Resolution, km/pixel

5

Filter size, pixels

17 x 17

Filter size, km

90

Scale

1:10 000 000

[59] Figure 3-12. Picno 0824S2-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0824S2-002

FDS

43959.21

Range, km

2 059 181

Subspacecraft latitude/longitude, degrees

12/48

Subsolar latitude/longitude, degrees

7/69

Resolution, km/pixel

19

Filter size, pixels

15 x 15

Filter size, km

286

Scale

1:10 000 000

[60] Figure 3-13. Picno 1060S2-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1060S2-002

FDS

43963.17

Range, km

1 820 441

Subspacecraft latitude/longitude, degrees

13/70

Subsolar latitude/longitude, degrees

7/94

Resolution, km/pixel

17

Filter size, pixels

15 x 15

Filter size, km

253

Scale

1:10 000 000

[61] Figure 3-14. Picno 1352S2-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1352S2-002

FDS

43968.09

Range, km

1 503 463

Subspacecraft latitude/longitude, degrees

15/98

Subsolar latitude/longitude, degrees

7/125

Resolution, km/pixel

14

Filter size, pixels

25 x 25

Filter size, km

348

Scale

1:10 000 000

[62] Figure 3-15. Picno 1770S2-002. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1770S2-002

FDS

43975.07

Range, km

1 073 890

Subspacecraft latitude/longitude, degrees

19/142

Subsolar latitude/longitude, degrees

7/169

Resolution, km/pixel

10

Filter size, pixels

25 x 25

Filter size, km

248

Scale

1:10 000 000

[63] Figure 3-16. Picno 0290S2-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0290S2-001

FDS

43980.27

Range, km

825 955

Subspacecraft latitude/longitude, degrees

22/183

Subsolar latitude/longitude, degrees

7/203

Resolution, km/pixel

8

Filter size, pixels

41 x 41

Filter size, km

313

Scale

1:10 000 000

[64] Figure 3-17. Picno 0604S2-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0604S2-001

FDS

43985.41

Range, km

683 286

Subspacecraft latitude/longitude, degrees

24/226

Subsolar latitude/longitude, degrees

7/236

Resolution, km/pixel

6

Filter size, pixels

51 x 51

Filter size, km

322

Scale

1:10 000 000

[65] Figure 3-18. Picno 0800S2-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0800S2-001

FDS

43988.57

Range, km

633 985

Subspacecraft latitude/longitude, degrees

24/253

Subsolar latitude/longitude, degrees

7/257

Resolution, km/pixel

6

Filter size, pixels

51 x 51

Filter size, km

299

Scale

1:10 000 000

[66] Figure 3-19. Picno 0999S2-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0999S2-001

FDS

43992.16

Range, km

594 153

Subspacecraft latitude/longitude, degrees

23/276

Subsolar latitude/longitude, degrees

7/278

Resolution, km/pixel

5

Filter size, pixels

61 x 61

Filter size, km

335

Scale

1:10 000 000

[67] Figure 3-20. Picno 1221S2-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1221S2-001

FDS

43995.58

Range, km

538 200

Subspacecraft latitude/longitude, degrees

21/299

Subsolar latitude/longitude, degrees

7/302

Resolution, km/pixel

5

Filter size, pixels

61 x 61

Filter size, km

304

Scale

1:10 000 000

[68] Figure 3-21. Picno 1700S2-001. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

1700S2-001

FDS

44003.57

Range, km

282 615

Subspacecraft latitude/longitude, degrees

17/329

Subsolar latitude/longitude, degrees

7/352

Resolution, km/pixel

3

Filter size, pixels

101 x 101

Filter size, km

264

Scale

1:10 000 000

[69] Figure 3-22. Picno 0115S2+000. (a) Unfiltered image. (b) High-pass filtered image. (c) Perspective grid.

Picno

0115S2+000

FDS

44007.32

Range, km

119 066

Subspacecraft latitude/longitude, degrees

-11/342

Subsolar latitude/longitude, degrees

7/15

Resolution, km/pixel

1

Filter size, pixels

31 x 31

Filter size, km

34

Scale

1:10 000 000