The Norse group is a large group of retrograde

irregular satellite In astronomy, an irregular moon, irregular satellite or irregular natural satellite is a natural satellite following a distant, inclined, and often eccentric and retrograde orbit. They have been captured by their parent planet, unlike regular s ...

s of

Saturn Saturn is the sixth planet from the Sun and the second-largest in the Solar System, after Jupiter. It is a gas giant with an average radius of about nine and a half times that of Earth. It has only one-eighth the average density of Earth; h ...

. Their semi-major axes range between 12 and 24 Gm, their

inclination Orbital inclination measures the tilt of an object's orbit around a celestial body. It is expressed as the angle between a Plane of reference, reference plane and the orbital plane or Axis of rotation, axis of direction of the orbiting object ...

s between 136° and 175° and their eccentricities between 0.13 and 0.77. Unlike for the

Inuit Inuit (; iu, ᐃᓄᐃᑦ 'the people', singular: Inuk, , dual: Inuuk, ) are a group of culturally similar indigenous peoples inhabiting the Arctic and subarctic regions of Greenland, Labrador, Quebec, Nunavut, the Northwest Territories ...

and

Gallic group The Gallic group is a dynamical grouping of the prograde irregular satellites of Saturn following similar orbits. Their semi-major axes range between 16 and 19 Gm, their inclinations between 35° and 40°, and their eccentricities around 0.53. ...

s, the orbital parameters are widely dispersed and group is likely to be composed from a number of subgroups with more homogenous orbital and physical parameters. For example, the satellites with inclinations around 174 degrees alone are thought to comprise at least two subgroups. Eight other moons form the Skathi subgroup. Their semi-major axes range between 15 and 20 Gm, their

s between 147° and 158°. Narvi forms a separate subgroup with Bestla. The

International Astronomical Union The International Astronomical Union (IAU; french: link=yes, Union astronomique internationale, UAI) is a nongovernmental organisation with the objective of advancing astronomy in all aspects, including promoting astronomical research, outreac ...

(IAU) reserves names taken from

Norse mythology Norse, Nordic, or Scandinavian mythology is the body of myths belonging to the North Germanic peoples, stemming from Old Norse religion and continuing after the Christianization of Scandinavia, and into the Nordic folklore of the modern period ...

(mostly giants) for these moons. The exception is Phoebe (

Greek mythology A major branch of classical mythology, Greek mythology is the body of myths originally told by the Ancient Greece, ancient Greeks, and a genre of Ancient Greek folklore. These stories concern the Cosmogony, origin and Cosmology#Metaphysical co ...

), the largest, which was discovered long before the others. The discovery of 17 new moons in this group was announced in October 2019. A team led by Scott S. Sheppard using the Subaru Telescope at Mauna Kea discovered 20 new moons, each about in diameter. 17 of these are thought to fit into the Norse group. One of these is the most distant moon of Saturn. A public naming contest for these moons was announced, restricted to names from Norse mythology. Ten of these moons received official names in August 2022. The members of the group are (in order of increasing distance from Saturn): * Phoebe * Skathi (Skathi subgroup) * S/2004 S 37 * S/2007 S 2 * Skoll (Skathi subgroup) *

Hyrrokkin Hyrrokkin (Old Norse: ) is a female jötunn in Norse mythology. According to 13th-century poet Snorri Sturluson, she launched the largest of all ships at Baldr's funeral after the Æsir gods were unable to budge the vessel. Hyrrokkin was a re ...

(Skathi subgroup) * Greip *

Mundilfari In Norse mythology Mundilfari (Old Norse: ; rendered variously ''Mundilfari'', ''Mundilföri'' and ''Mundilfœri'') (Old Norse, possibly "the one moving according to particular times"Simek (2007:222).) is the father of Sól, goddess associated ...

S/2004 S 13 S/2004 S 13 is a natural satellite of Saturn. 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 9 March 2005. S/2004 S 13 is a ...

S/2006 S 1 S/2006 S 1 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on June 26, 2006 from observations taken between January 4 and April 30, 2006. S/2006 S 1 is about 6 ...

(Skathi subgroup) *

S/2007 S 3 S/2007 S 3 is a natural satellite of Saturn. Its discovery was announced by Scott S. Sheppard, David C. Jewitt, Jan Kleyna, and Brian G. Marsden on 1 May 2007 from observations taken between 18 January and 19 April 2007. S/2007 S 3 is about 5 k ...

* Suttungr * Gridr * Jarnsaxa * Narvi (Narvi subgroup) * Bergelmir (Skathi subgroup) * Hati *

S/2004 S 17 S/2004 S 17 is a natural satellite of Saturn. 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 13 December 2004 and 5 March 2005. S/2004 S 17 is ab ...

* S/2004 S 12 * Eggther * Farbauti (Skathi subgroup) * Thrymr *

Bestla Bestla (Old Norse: ) is a jötunn in Norse mythology, and the mother of the gods Odin, Vili and Vé (by way of Borr). She is also the sister of an unnamed man who assisted Odin, and the daughter (or granddaughter depending on the source) of th ...

(Narvi subgroup) * S/2004 S 7 * Aegir * Beli (Skathi subgroup) * Angrboda *

Gerd Gerd or GERD may refer to: * Gerd (given name), a list of people with the given name or nickname * Gerd (moon), a moon of Saturn * Gerd Island, South Orkney Islands, Antarctica * Gastroesophageal reflux disease, a chronic symptom of mucosal damage ...

* Gunnlod (Skathi subgroup) * Skrymir * S/2006 S 3 (Skathi subgroup) * Alvaldi *

Kari Kari or KARI may refer to: Places *Kari, Jhunjhunu, a village in Rajasthan, India * , a village in Mouhoun Province, Burkina Faso *Kari, Tikamgarh, a town in Madhya Pradesh, India * Kari, Iran, a village in Bushehr Province, Iran * Kari-ye Bozorg ( ...

(Skathi subgroup) * S/2004 S 28 * Loge * Geirrod (Skathi subgroup) *

Fenrir Fenrir (Old Norse: ; "fen-dweller")Orchard (1997:42). or Fenrisúlfr (O.N.: ; "Fenrir's wolf", often translated "Fenris-wolf"),Simek (2007:81). also referred to as Hróðvitnir (O.N.: ; "fame-wolf")Simek (2007:160). and Vánagandr (O.N.: ; " ...

Ymir In Norse mythology, Ymir (, ), also called Aurgelmir, Brimir, or Bláinn, is the ancestor of all jötnar. Ymir is attested in the ''Poetic Edda'', compiled in the 13th century from earlier traditional material, in the ''Prose Edda'', writ ...

* Surtur * Thiazzi * S/2004 S 21 (Skathi subgroup) * S/2004 S 39 * S/2004 S 36 (Narvi subgroup) * Fornjot * Saturn LXIV * Saturn LVIII

References

External links

S. Sheppard's classification
of Saturn's irregular moons {{DEFAULTSORT:Norse group Norse group Moons of Saturn Irregular satellites Moons with a retrograde orbit

See also

References

External links