S/2005 S 4 - Misplaced Pages

Moon of Saturn

S/2005 S 4
Discovery
Discovered by	Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Brett J. Gladman
Discovery date	2005
Orbital characteristics
Semi-major axis	11,324,500 km (7,036,700 mi)
Eccentricity	0.315
Orbital period (sidereal)	1.232 yrs (450.22 d)
Inclination	48.0° (to the ecliptic)
Satellite of	Saturn
Group	Inuit group (Kiviuq)
Physical characteristics
Mean diameter	5 km
Absolute magnitude (H)	15.7

S/2005 S 4 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, Edward Ashton, Brett J. Gladman, Jean-Marc Petit and Mike Alexandersen on May 10, 2023, from observations taken between December 12, 2004, and July 8, 2021.

S/2005 S 4 is about 5 kilometers in diameter, and orbits Saturn at a distance of 11.303 Gm in 448.63 days, at an inclination of 52.5, orbits in prograde direction and eccentricity of 0.177. S/2005 S 4 belongs to the Inuit group and it may be a Kiviuq and/or Ijiraq fragment that broke off long ago, since it shares the same orbital elements.

The orbit of S/2005 S 4 librates in accordance with the von Zeipel–Lidov–Kozai effect.

References

^ "Planetary Satellite Mean Elements". Jet Propulsion Laboratory. California Institute of Technology. Retrieved 10 May 2023.
^ "MPEC 2023-J79 : S/2005 S 4". Minor Planet Electronic Circular. Minor Planet Center. Retrieved 10 May 2023.
^ "S/2005 S 4". Tilmann's Web Site. Tilmann Denk. Retrieved 25 December 2023.
^ Grishin, Evgeni (September 2024). "Irregular Fixation II: The orbits of irregular satellites". Monthly Notices of the Royal Astronomical Society. 533 (1): 497–509. arXiv:2407.05123. Bibcode:2024MNRAS.533..497G. doi:10.1093/mnras/stae1752.

Moons of Saturn

Listed in approximate increasing distance from Saturn

Ring moonlets

Ring shepherds

Other inner moons

Alkyonides

Large moons
(with trojans)

Inuit group (13)

Kiviuq subgroup	S/2019 S 1 Kiviuq S/2005 S 4 S/2020 S 1 Ijiraq
Paaliaq subgroup	Paaliaq
Siarnaq subgroup	S/2004 S 31 Tarqeq S/2019 S 14 Siarnaq S/2020 S 3 S/2019 S 6 S/2020 S 5

Gallic group (7)

Norse group (100)

Phoebe subgroup	Phoebe S/2006 S 20 S/2006 S 9

Skathi
S/2007 S 5
S/2007 S 7
S/2007 S 2
S/2004 S 37
S/2004 S 47
S/2004 S 40
S/2019 S 2
S/2019 S 3
S/2020 S 7
Skoll
S/2020 S 2
S/2019 S 4
S/2004 S 41
S/2004 S 42
Hyrrokkin
Greip
S/2004 S 13
S/2007 S 6
Mundilfari
S/2006 S 1
S/2004 S 43
S/2006 S 10
S/2019 S 5
Gridr
Bergelmir
Jarnsaxa
Narvi
Suttungr
S/2004 S 44
S/2007 S 3
S/2004 S 45
Hati
S/2004 S 17
S/2006 S 11
S/2004 S 12
Eggther
S/2006 S 13
S/2007 S 9
S/2019 S 7
S/2019 S 8
Farbauti
Thrymr
Bestla
S/2019 S 9
S/2004 S 46
Angrboda
S/2019 S 11
Aegir
S/2019 S 10
Beli
S/2019 S 12
Gerd
S/2019 S 13
S/2006 S 14
Gunnlod
S/2019 S 15
S/2020 S 6
S/2004 S 7
S/2006 S 3
S/2005 S 5
Skrymir
S/2006 S 16
S/2006 S 15
S/2004 S 28
S/2020 S 8
Alvaldi
Kari
S/2004 S 48
Geirrod
Fenrir
S/2004 S 50
S/2006 S 17
S/2004 S 49
S/2019 S 17
Surtur
S/2006 S 18
Loge
Ymir
S/2019 S 19
S/2019 S 18
S/2004 S 21
S/2004 S 39
S/2019 S 16
S/2004 S 53
S/2004 S 36
Thiazzi
S/2019 S 20
S/2006 S 19
Saturn LXIV
Fornjot
S/2004 S 51
S/2020 S 10
S/2020 S 9
Saturn LVIII
S/2019 S 21
S/2004 S 52

Outlier prograde
irregular moons

S/2006 S 12

S/2004 S 24

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