Mundilfari (moon)

Mundilfari, or Saturn XXV, is a natural satellite of Saturn. It was discovered by Brett J. Gladman, et al. in 2000, and given the temporary designation S/2000 S 9. Mundilfari is about 7 kilometres in diameter, and orbits Saturn at an average distance of 18,360 Mm in 928.806 days, at an inclination of 170° to the ecliptic (150° to Saturn's equator), in a retrograde direction and with an eccentricity of 0.198. Its rotation period is 6.74±0.08 hours.[3]

Mundilfari
Discovery
Discovery images of Mundilfari (circled) taken by the CFHT in September 2000
Discovered by	Gladman et al.
Discovery date	2000
Designations
Designation	Saturn XXV
Pronunciation	Icelandic: [ˈmʏntɪlvarɪ][1]
Named after	Mundilfari
Alternative names	S/2000 S 9
Orbital characteristics [2]
Semi-major axis	18685000 km (18360000 km[3])
Eccentricity	0.210 (0.198[3])
Orbital period	−952.6 days (−928.8 days[3])
Inclination	167.3° (150°[3])
Satellite of	Saturn
Group	Norse group
Physical characteristics
Mean diameter	7+50% −30% km[3]
Rotation period	6.74±0.08 hours[3]
Apparent magnitude	23.8[2]

Mundilfari may have formed from debris knocked off Phoebe by large impacts at some point in the Solar System's history.

It was named in August 2003 from Norse mythology, where Mundilfari is the father of the goddess Sól (Sun) and the god Mani (Moon).

References

The name is also found as Mundilföri ~ Mundilfœri. This would correspond to modern Icelandic Mundilfæri [ˈmʏntɪlvaɪrɪ].
S.S. Sheppard (2019), Moons of Saturn, Carnegie Science, on line
Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.

IAUC 7538: S/2000 S 7, S/2000 S 8, S/2000 S 9 December 7, 2000 (discovery)
MPEC 2000-Y15: S/2000 S 1, S/2000 S 2, S/2000 S 7, S/2000 S 8, S/2000 S 9 December 19, 2000 (discovery and ephemeris)
IAUC 8177: Satellites of Jupiter, Saturn, Uranus August 8, 2003 (naming the moon)

Saturn
Outline of Saturn
Geography	Dragon Storm Great White Spot Hexagon Magnetosphere Rings
Moons	S/2009 S 1 Ring moonlets Pan Daphnis Atlas Prometheus S/2004 S 6 S/2004 S 4 S/2004 S 3 Pandora Epimetheus Janus Aegaeon Mimas Methone Anthe Pallene Enceladus Tethys Telesto Calypso Dione Helene Polydeuces Rhea Titan Hyperion Iapetus Kiviuq Ijiraq Phoebe Paaliaq Skathi S/2004 S 37 Albiorix S/2007 S 2 S/2004 S 29 Bebhionn Erriapus Skoll S/2004 S 31 Siarnaq Tarqeq S/2004 S 13 Greip Hyrrokkin Jarnsaxa Tarvos Mundilfari S/2006 S 1 S/2004 S 17 Bergelmir Narvi S/2004 S 20 Suttungr Hati S/2004 S 12 S/2004 S 27 Farbauti Thrymr S/2004 S 30 Aegir S/2007 S 3 Bestla S/2004 S 7 S/2004 S 22 S/2004 S 23 S/2004 S 25 S/2004 S 32 S/2006 S 3 S/2004 S 38 Fenrir S/2004 S 28 Surtur Kari S/2004 S 35 Ymir S/2004 S 21 S/2004 S 24 Loge S/2004 S 36 S/2004 S 39 S/2004 S 33 S/2004 S 34 Fornjot S/2004 S 26
Astronomy	Delta Octantis Saturn-crossing minor planets
Exploration	Cassini–Huygens (Huygens) timeline retirement Pioneer 11 Voyager program Voyager 1 Voyager 2
Related	Fiction Moons The Day the Earth Smiled In Saturn's Rings (2018 documentary)

Natural satellites of the Solar System
Planetary satellites	Terrestrial Martian Jovian Saturnian Uranian Neptunian
Dwarf planet satellites	Plutonian Haumean Makemakean Eridian
Minor-planet moons	· Near-Earth: Florence Didymos (Dimorphos) Moshup (Squannit) 1994 CC 2001 SN₂₆₃ Main belt: Kalliope (Linus) Euphrosyne Daphne (Peneius) Eugenia (Petit-Prince) Sylvia (Romulus · Remus) Minerva (Aegis · Gorgoneion) Camilla Elektra Kleopatra (Alexhelios · Cleoselene) Ida (Dactyl) Roxane (Olympias) Pulcova Balam Jupiter trojans: Patroclus (Menoetius) Hektor (Skamandrios) Eurybates (Queta) TNOs: Lempo (Hiisi · Paha) Quaoar (Weywot) 2002 UX₂₅ Sila–Nunam Orcus (Vanth) Salacia (Actaea) Varda (Ilmarë) Gonggong (Xiangliu) Gǃkúnǁʼhòmdímà (Gǃòʼé ǃHú) 2013 FY₂₇
Ranked by size	Planetary-mass moon Ganymede largest: 5268 km / 0.413 Earths Titan Callisto Io Moon Europa Triton Titania Rhea Oberon Iapetus Charon Umbriel Ariel Dione Tethys Dysnomia Enceladus Miranda Vanth Proteus Mimas Ilmarë Nereid Hiʻiaka Actaea Hyperion ...
Discovery timeline Inner moons Irregular moons List Planetary-mass moons Naming Subsatellite Regular moons Trojan moons

Moons of Saturn
Listed in approximately increasing distance from Saturn as of epoch JD 2459200.5.
Ring shepherds	S/2009 S 1 Ring moonlets Pan Daphnis Atlas Prometheus Pandora
Co-orbitals	Epimetheus Janus
G Ring	Aegaeon
Alkyonides	Methone Anthe Pallene
Inner large (with trojans)	Mimas Enceladus Tethys Telesto Calypso Dione Helene Polydeuces
Outer large	Rhea Titan Hyperion Iapetus
Inuit group (7)	Kiviuq Ijiraq Paaliaq S/2004 S 29 S/2004 S 31 Tarqeq Siarnaq
Norse group (46)	Phoebe Skathi S/2004 S 37 S/2007 S 2 Skoll Hyrrokkin Greip Mundilfari S/2004 S 13 (?) S/2006 S 1 S/2007 S 3 (?) Suttungr S/2004 S 20 Jarnsaxa Narvi Bergelmir Hati S/2004 S 17 (?) S/2004 S 12 (?) S/2004 S 27 Farbauti Thrymr Bestla S/2004 S 7 (?) Aegir S/2004 S 30 S/2004 S 22 S/2004 S 25 S/2004 S 32 S/2004 S 23 S/2006 S 3 S/2004 S 35 Kari S/2004 S 28 Loge S/2004 S 38 Fenrir Ymir Surtur S/2004 S 33 S/2004 S 21 S/2004 S 39 S/2004 S 36 Fornjot S/2004 S 34 S/2004 S 26
Gallic group (4)	Albiorix Bebhionn Erriapus Tarvos
Prograde outer satellites	S/2004 S 24
Rings of Saturn Cassini–Huygens Themis Chiron S/2004 S 6 S/2004 S 4 S/2004 S 3 In fiction

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