Fornjot (moon)

Fornjot /ˈfɔːrnjoʊt/ or Saturn XLII is the second outermost natural satellite of Saturn (after S/2004 S 26). Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on 4 May 2005 from observations taken between 12 December 2004, and 11 March 2005.

Fornjot
Discovery
Fornjot imaged by the Cassini spacecraft in March 2014
Discovery date	2004
Designations
Designation	Saturn XLII
Pronunciation	/ˈfɔːrnjoʊt/ Icelandic: [ˈfɔrnjoutʰ]
Named after	Fornjót
Alternative names	S/2004 S 8
Orbital characteristics [1]
Semi-major axis	25108000 km
Eccentricity	0.206
Orbital period	−1490.9 days
Inclination	170.4°
Satellite of	Saturn
Group	Norse group
Physical characteristics
Mean diameter	6+50% −30% km[2]
Rotation period	(7 or 9.5) ± 0.4? h[2]
Apparent magnitude	24.6

It is about 6 kilometres in diameter, and it orbits Saturn at an average distance of 23,609 Mm in 1354 d at an inclination of 168° to the ecliptic (160° to Saturn's equator) in a retrograde direction and with an eccentricity of 0.186. It has an ambiguous rotation period of 7 or 9.5±0.4 hours.[2]

Fornjot was named after Fornjót, a giant in Norse mythology.

References

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.

Institute for Astronomy Saturn Satellite Data
Jewitt's New Satellites of Saturn page
IAUC 8523: New Satellites of Saturn May 4, 2005 (discovery)
MPEC 2005-J13: Twelve New Satellites of Saturn May 3, 2005 (discovery and ephemeris)
IAUC 8826: Satellites of Jupiter and Saturn April 5, 2007 (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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