Saturnus månar

Planeten Saturnus har 53 namngivna månar och ytterligare 29 som fortfarande studeras. Många av månarna är mycket små: 33 månar är mindre än 10 km i diameter och tretton månar är mindre än 50 km i diameter. Många av månarna är uppkallade efter titaner, jättar eller mindre grekiska eller romerska gudar. Några av Saturnus månar är mycket stora; månen Titan är större än planeten Merkurius.

 

Bekräftade månar

Saturnus månar listas här efter omloppstid (eller halvmajor axel), från kortast till längst. Månar som är tillräckligt massiva för att deras ytor ska ha kollapsat till en sfäroid är markerade med fet stil, medan de oregelbundna månarna är listade med röd, orange och grå bakgrund.

Nyckel

†
Större isiga månar

♠
Titan

‡
Inuitgrupp

♦
Galliska gruppen

♣
Norsk grupp

På senare tid har man upptäckt 20 nya månar till Saturnus som ännu inte har fått något namn.

Beställ

Etikett

Namn

Uttryck

Bild

Diameter (km)

Massa (
×1015 kg)

Halvstor axel (km)

Omloppstid (d)

Lutning

Excentricitet

Position


Upptäcktsår

Upptäckare

1

S/2009 S/2009 S 1

-

≈ 0.3

< 0.0001

≈ 117000

≈ 0.47

≈ 0°

≈ 0

yttre B-ring

2009

Cassini

(moonlets)

-

A noisy image showing a few bright dots marked by circles

0,04 till 0,4 (Earhart)

< 0.0001

≈ 130000

≈ 0.55

≈ 0°

≈ 0

Tre 1000 km långa band inom en ring

2006

Cassini

2

XVIII

Pan Pan Pan

/ˈpæn/

A bright fuzzy band (rings of Saturn) is running from the left to right. In the center a bright irregularity shaped body is superimposed on its upper edge. A narrow grayish band, which is a part of the main band, partially covers the body.

28.2±2.6
(34 × 31 × 20)

4.95±0.75

133584

+0.57505

0.001°

0.000035

i Encke-divisionen

1990

M. Showalter

3

XXXV

Daphnis Daphnis

/ˈdæfnɪs/

Two bright bands run from the left to right. In the narrow gap between them (Keeler gap), which has wavy edges, a small oblong object can be seen.

7.6±1.6
(9 × 8 × 6)

0.084±0.012

136505

+0.59408

≈ 0°

≈ 0

i Keeler Gap

2005

Cassini

4

XV

Atlas Atlas Atlas

/ˈætləs/

An irregularly shaped body is fully illuminated. The body, which looks like a cone viewed from the south pole, is elongated downward.

30.2±1.8
(41 × 35 × 19)

6.6±0.045

137670

+0.60169

0.003°

0.0012

yttre A Ringherde

1980

Voyager 2

5

XVI

Prometheus Prometheus

/proʊˈmiːθiəs/

An irregularly shaped oblong body is fully illuminated. It is elongated in the direction from the right to left. Its surface is covered by craters. There is valley at the top.

86.2±5.4
(136 × 79 × 59)

159.5±1.5

139380

+0.61299

0.008°

0.0022

inre F Ringherde

1980

Voyager 2

6

XVII

Pandora Pandora Pandora

/pænˈdɔːrə/

An irregularly shaped body is half illuminated from the bottom. The terminator runs from the left to right. The surface is covered by numerous craters.

81.4±3.0
(104 × 81 × 64)

137.1±1.9

141720

+0.62850

0.050°

0.0042

yttre F Ring Shepherd

1980

Voyager 2

7a

XI

Epimetheus Epimetheus

/ɛpɪˈmiːθiəs/

A partially-illuminated irregular body, which has a shape remotely resembling a cube. The body's surface consists of ridges and valleys and is covered by craters.

116.2±3.6
(130 × 114 × 106)

526.6±0.6

151422

+0.69433

0.335°

0.0098

samorbital med Janus

1977

J. Fountain och S. Larson

7b

X

Janus Janus

/ˈdʒeɪnəs/

An irregular body, whose outline looks like an approximate circle in this image. It is illuminated from the bottom-left. The terminator runs from the top-left to bottom-right. The surface is covered by craters.

179.0±2.8
(203 × 185 × 153)

1897.5±0.6

151472

+0.69466

0.165°

0.0068

samorbital med Epimetheus

1966

A. Dollfus

9

LIII

Aegaeon Aegaeon

/iːˈdʒiːən/

Image of Aegaeon.

≈ 0.5

≈ 0.0001

167500

+0.80812

0.001°

0.0002

G Ring moonlet

2008

Cassini

10

I

Mimas †Mimas

/ˈmaɪməs/

A spherical body is half illuminated from the left. The terminator runs from the top to bottom in the vicinity of the right limb. A large crater with a central peak sits on the terminator slightly to the right and above the center of the body. It makes the body look like the Death Star. There are numerous smaller craters.

396.4±0.8
(416 × 393 × 381)

37493±31

185404

+0.942422

1.566°

0.0202

 

1789

W. Herschel

11

XXXII

Methone Methone

/mɪˈθoʊniː/

From May 2012 flyby

3.2±1.2

≈ 0.02

194440

+1.00957

0.007°

0.0001

Alkyonider

2004

Cassini

12

XLIX

Anthe Anthe

/ˈænθiː/

1.8

≈ 0.0015

197700

+1.05089

0.1°

0.0011

Alkyonider

2007

Cassini

13

XXXIII

Pallene Pallene

/pəˈliːniː/

In the center is Pallene, a moon of Saturn

5.0±1.2
(6 × 6 × 4)

≈ 0.05

212280

+1.15375

0.181°

0.0040

Alkyonider

2004

Cassini

14

II

Enceladus †Enceladus

/ɛnˈsɛlədəs/

A spherical body is half illuminated from the right. The terminator runs from the top to bottom in the vicinity of the left limb. In the center and at the top there are heavily cratered areas.

504.2±0.4
(513 × 503 × 497)

108022±101

237950

+1.370218

0.010°

0.0047

Genererar E-ringen

1789

W. Herschel

15

III

Tethys †Tethys

/ˈtiːθɪs/

A spherical heavily cratered body is illuminated from the bottom. The terminator runs from the left to right in the vicinity of the top limb. There is a wide curved graben running from the center of the body to the bottom. It is Ithaca Chasma.

1062±1.2
(1077 × 1057 × 1053)

617449±132

294619

+1.887802

0.168°

0.0001

 

1684

G. Cassini

15a

XIII

Telesto Telesto

/tɪˈlɛstoʊ/

24.8±0.8
(33 × 24 × 20)

≈ 9.41

294619

+1.887802

1.158°

0.000

ledande Tethys-trojaner

1980

B. Smith, H. Reitsema, S. Larson och J. Fountain.

15b

XIV

Calypso Calypso

/kəˈlɪpsoʊ/

An oblong reddish body is seen in this low resolution image.

21.4±1.4
(30 × 23 × 14)

≈ 6.3

294619

+1.887802

1.473°

0.000

Tethys-trojaner som följer med.

1980

D. Pascu, P. Seidelmann, W. Baum och D. Currie

18

IV

Dione †Dione

/daɪˈoʊniː/

A spherical body is half illuminated from the right. The terminator is running from the top to bottom slightly to the left off the center. The central part of the body is smooth and has only a few craters. A heavily cratered terrain is near the right limb. A part of a large crater is intersected by the terminator in the lower-left corner. To the left of it there is a long crack running parallel to the terminator.

1122.8±0.8
(1128 × 1123 × 1119)

1095452±168

377396

+2.736915

0.002°

0.0022

 

1684

G. Cassini

18a

XII

Helene Helene

/ˈhɛlɪniː/

An irregularly shaped body illuminated from the left. Its surface is covered by numerous impact craters.

35.2±0.8
(43 × 38 × 26)

≈ 24.46

377396

+2.736915

0.212°

0.0022

ledande Dione-trojaner

1980

P. Laques och J. Lecacheux

18b

XXXIV

Polydeuces Polydeuces

/pɒliˈdjuːsiːz/

A small oblong body is barely resolved in this image.

2.6±0.8
(3 × 2 × 1)

≈ 0.03

377396

+2.736915

0.177°

0.0192

Dione-trojaner som släpar efter sig

2004

Cassini

21

V

Rhea †Rhea

/ˈriːə/

A spherical body is almost fully illuminated. The terminator is running near the top edge. The surface is covered by numerous craters. Two partially overlapping large craters can be seen above the center. One that is younger is above and to the right from the older one.

1527.0±1.2
(1530 × 1526 × 1525)

2306518±353

527108

+4.518212

0.327°

0.001258

 

1672

G. Cassini

22

VI

Titan ♠Titan

/ˈtaɪtən/

An orange spherical body is half illuminated from the right. The terminator is running from the top to bottom slightly to the left off the center. Both limb and terminator are fuzzy due to light scattering in the atmosphere.

5149.46±0.18
(5149 × 5149 × 5150)

134520000±20000

1221930

+15.94542

0.3485°

0.0288

 

1655

C. Huygens

23

VII

Hyperion †Hyperion

/haɪˈpɪəriən/

An irregularly shaped oblong body is illuminated from the left. The terminator is near the right limb. The body is elongated in the top-bottom direction. The surface is punctured by numerous impact craters, which make it look like a sponge or cheese.

270±8
(360 × 266 × 205)

5620±50

1481010

+21.27661

0.568°

0.123006

i 4:3-resonans med Titan

1848

W. Bond
G. Bond
 W. Lassell

24

VIII

Iapetus †Iapetus

/aɪˈæpɪtəs/

A walnut shaped body illuminated from the bottom-left. The terminator runs from the top to right along the top-right limb. An equatorial ridge runs from the left to right and is convex in the direction of the bottom-left. Above and below it there are dark areas. Above the upper dark area and below the lower one there are bright poles. There numerous craters. Three among them are very large: one sits on the limb at the right another is in the center above the ridge. The third is below the ridge near the left limb.

1468.6±5.6
(1491 × 1491 × 1424)

1805635±375

3560820

+79.3215

15.47°

0.028613

 

1671

G. Cassini

25

XXIV

Kiviuq ‡Kiviuq

/ˈkɪviək/

≈ 16

≈ 2.79

11294800

+448.16

49.087°

0.3288

Inuitgrupp

2000

B. Gladman, J. Kavelaars, et al.

26

XXII

Ijiraq ‡Ijiraq

/ˈiːɪrɒk/

≈ 12

≈ 1.18

11355316

+451.77

50.212°

0.3161

Inuitgrupp

2000

B. Gladman, J. Kavelaars, et al.

27

IX

Phoebe ♣†Phoebe

/ˈfiːbiː/

An approximately spherical heavily cratered body is illuminated from the bottom-right. The terminator runs near the left and top limbs. There is huge crater at the top, which affects the shape, and another slightly smaller at the bottom.

213.0±1.4
(219 × 217 × 204)

8292±10

12869700

-545.09

173.047°

0.156242

Norsk grupp

1899

W. Pickering

28

XX

Paaliaq ‡Paaliaq

/ˈpɑːliɒk/

≈ 22

≈ 7.25

15103400

+692.98

46.151°

0.3631

Inuitgrupp

2000

B. Gladman, J. Kavelaars, et al.

29

XXVII

Skathi ♣Skathi

/ˈskɒði/

≈ 8

≈ 0.35

15672500

-732.52

149.084°

0.246

Nordiska (Skathi) gruppen

2000

B. Gladman, J. Kavelaars, et al.

30

XXVI

Albiorix ♦Albiorix

/ˌælbiˈɒrɪks/

≈ 32

≈ 22.3

16266700

+774.58

38.042°

0.477

Gallisk grupp

2000

M. Holman

31

 

S/2007A ♣S/2007 S 2

-

≈ 6

≈ 0.15

16560000

-792.96

176.68°

0.2418

Norsk grupp

2007

S. Sheppard, D. Jewitt, J. Kleyna, B. Marsden

32

XXXVII

Bebhionn ♦Bebhionn

/bɛˈviːn/

≈ 6

≈ 0.15

17153520

+838.77

40.484°

0.333

Gallisk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

33

XXVIII

Erriapus ♦Erriapus

/ɛriˈæpəs/

≈ 10

≈ 0.68

17236900

+844.89

38.109°

0.4724

Gallisk grupp

2000

B. Gladman, J. Kavelaars, et al.

34

XLVII

Skoll ♣Skoll

/ˈskɒl/

≈ 6

≈ 0.15

17473800

-862.37

155.624°

0.418

Norsk (Skathi) grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

35

XXIX

Siarnaq ‡Siarnaq

/ˈsiːɑːrnək/

≈ 40

≈ 43.5

17776600

+884.88

45.798°

0.24961

Inuitgrupp

2000

B. Gladman, J. Kavelaars, et al.

36

LII

Tarqeq ‡Tarqeq

/ˈtɑːrkeɪk/

≈ 7

≈ 0.23

17910600

+894.86

49.904°

0.1081

Inuitgrupp

2007

S. Sheppard, D. Jewitt, J. Kleyna

37

 

S/2004B ♣S/2004 S 13

-

≈ 6

≈ 0.15

18056300

-905.85

167.379°

0.261

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

38

LI

Greip ♣Greip

/ˈɡreɪp/

≈ 6

≈ 0.15

18065700

-906.56

172.666°

0.3735

Norsk grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

39

XLIV

Hyrrokkin ♣Hyrrokkin

/hɪˈrɒkɪn/

≈ 8

≈ 0.35

18168300

-914.29

153.272°

0.3604

Norsk (Skathi) grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

40

L

Jarnsaxa ♣Jarnsaxa

/jɑːrnˈsæksə/

≈ 6

≈ 0.15

18556900

-943.78

162.861°

0.1918

Norsk grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

41

XXI

Tarvos ♦Tarvos

/ˈtɑːrvəs/

≈ 15

≈ 2.3

18562800

+944.23

34.679°

0.5305

Gallisk grupp

2000

B. Gladman, J. Kavelaars, et al.

42

XXV

Mundilfari ♣Mundilfari

/mʊndəlˈværi/

≈ 7

≈ 0.23

18725800

-956.70

169.378°

0.198

Norsk grupp

2000

B. Gladman, J. Kavelaars, et al.

43

 

S/2006 ♣S/2006 S 1

-

≈ 6

≈ 0.15

18930200

-972.41

154.232°

0.1303

Norsk (Skathi) grupp

2006

S. Sheppard, D.C. Jewitt, J. Kleyna

44

 

S/2004C ♣S/2004 S 17

-

≈ 4

≈ 0.05

19099200

-985.45

166.881°

0.226

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

45

XXXVIII

Bergelmir ♣Bergelmir

/bɛərˈjɛlmɪər/

≈ 6

≈ 0.15

19104000

-985.83

157.384°

0.152

Norsk (Skathi) grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

46

XXXI

Narvi ♣Narvi

/ˈnɑːrvi/

≈ 7

≈ 0.23

19395200

-1008.45

137.292°

0.320

Norsk (Narvi) grupp

2003

S. Sheppard, D. Jewitt, J. Kleyna

47

XXIII

Suttungr ♣Suttungr

/ˈsʊtʊŋɡər/

≈ 7

≈ 0.23

19579000

-1022.82

174.321°

0.131

Norsk grupp

2000

B. Gladman, J. Kavelaars, et al.

48

XLIII

Hati ♣Hati

/ˈhɑːti/

≈ 6

≈ 0.15

19709300

-1033.05

163.131°

0.291

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

49

 

S/2004A ♣S/2004 S 12

-

≈ 5

≈ 0.09

19905900

-1048.54

164.042°

0.396

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

50

XL

Farbauti ♣Farbauti

/fɑːrˈbaʊti/

≈ 5

≈ 0.09

19984800

-1054.78

158.361°

0.209

Norsk (Skathi) grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

51

XXX

Thrymr ♣Thrymr

/ˈθrɪmər/

≈ 7

≈ 0.23

20278100

-1078.09

174.524°

0.453

Norsk grupp

2000

B. Gladman, J. Kavelaars, et al.

52

XXXVI

Aegir ♣Aegir

/ˈaɪ. ɪər/

≈ 6

≈ 0.15

20482900

-1094.46

167.425°

0.237

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

53

 

S/2007B ♣S/2007 S 3

-

≈ 5

≈ 0.09

20518500

≈ -1100

177.22°

0.130

Norsk grupp

2007

S. Sheppard, D. Jewitt, J. Kleyna

54

XXXIX

Bestla ♣Bestla

/ˈbɛstlə/

≈ 7

≈ 0.23

20570000

-1101.45

147.395°

0.5145

Norsk (Narvi) grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

55

 

S/2007C ♣S/2004 S 7

-

≈ 6

≈ 0.15

20576700

-1101.99

165.596°

0.5299

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

56

 

S/2006 ♣S/2006 S 3

-

≈ 6

≈ 0.15

21076300

-1142.37

150.817°

0.4710

Norsk (Skathi) grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

57

XLI

Fenrir ♣Fenrir

/ˈfɛnrɪər/

≈ 4

≈ 0.05

21930644

-1212.53

162.832°

0.131

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

58

XLVIII

Surtur ♣Surtur

/ˈsɜːrtər/

≈ 6

≈ 0.15

22288916

-1242.36

166.918°

0.3680

Norsk grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

59

XLV

Kari ♣Kari

/ˈkɑːri/

≈ 7

≈ 0.23

22321200

-1245.06

148.384°

0.3405

Norsk (Skathi) grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

60

XIX

Ymir ♣Ymir

/ˈɪmɪər/

≈ 18

≈ 3.97

22429673

-1254.15

172.143°

0.3349

Norsk grupp

2000

B. Gladman, J. Kavelaars, et al.

61

XLVI

Loge ♣Loge

/ˈlɔɪ. eɪ/

≈ 6

≈ 0.15

22984322

-1300.95

166.539°

0.1390

Norsk grupp

2006

S. Sheppard, D. Jewitt, J. Kleyna

62

XLII

Fornjot ♣Fornjot

/ˈfɔːrnjɒt/

≈ 6

≈ 0.15

24504879

-1432.16

167.886°

0.186

Norsk grupp

2004

S. Sheppard, D. Jewitt, J. Kleyna

Obekräftade månar

Följande objekt (observerade av Cassini) har inte bekräftats vara fasta kroppar. Det är ännu inte klart om de är riktiga satelliter eller om de bara är kvarvarande klumpar i F-ringen.

Namn

Bild

Diameter (km)

Halvstor
axel (km)


Omloppstid (d)

Position

Upptäcktsår

S/2004 S 6

A bright narrow band runs from the top to bottom. To the right of it in the diffuse halo the is a bright small object.

≈ 3-5

≈ 140130

+0.61801

osäkra objekt runt F-ringen

2004

S/2004 S 3/S 4

≈ 3-5

≈ 140300

≈ +0.619

2004
 

Hypotetiska månar

Två månar påstås ha upptäckts av olika astronomer men har aldrig setts igen. Båda månarna sägs kretsa mellan Titan och Hyperion.

  • Chiron som Hermann Goldschmidt påstås ha sett 1861, men som aldrig observerats av någon annan.
  • Themis påstods ha upptäckts 1905 av astronomen William Pickering, men har aldrig setts igen. Trots detta fanns den med i många almanackor och astronomiböcker fram till 1960-talet.
 

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