Angrboda (Saturn LV), provisionally known as S/2004 S 22, is a

natural satellite A natural satellite is, in the most common usage, an astronomical body that orbits a planet, dwarf planet, or small Solar System body (or sometimes another natural satellite). Natural satellites are often colloquially referred to as ''moons ...

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; ...

. Its discovery was announced by

Scott S. Sheppard Scott Sander Sheppard (born 1977) is an American astronomer and a discoverer of numerous moons, comets and minor planets in the outer Solar System. He is an astronomer in the Department of Terrestrial Magnetism at the Carnegie Institution for Scie ...

David C. Jewitt David Clifford Jewitt (born 1958) is a British-American astronomer who studies the Solar System, especially its minor bodies. He is based at the University of California, Los Angeles, where he is a Member of the Institute for Geophysics and Pl ...

, and

Jan Kleyna Jan T. Kleyna is a postdoctoral astronomy researcher at the University of Hawai'i A university () is an institution of higher (or tertiary) education and research which awards academic degrees in several academic disciplines. ''University ...

on October 7, 2019 from observations taken between December 12, 2004 and February 1, 2006. It was given its permanent designation in August 2021. On 24 August 2022, it was officially named after

Angrboða Angrboða (Old Norse: ; also Angrboda) is a'' jötunn'' in Norse mythology. She is the mate of Loki and the mother of monsters. She is only mentioned once in the Poetic Edda ('' Völuspá hin skamma)'' as the mother of Fenrir by Loki. The Prose E ...

, a

jötunn A (also jotun; in the normalised scholarly spelling of Old Norse, ; ; plural / ) or, in Old English, (plural ) is a type of supernatural being in Germanic mythology. In Norse mythology, they are often contrasted with gods (Æsir and Vanir ...

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 peri ...

. She is the consort of

Loki Loki is a god in Norse mythology. According to some sources, Loki is the son of Fárbauti (a jötunn) and Laufey (mentioned as a goddess), and the brother of Helblindi and Býleistr. Loki is married to Sigyn and they have two sons, Narfi ...

and the mother of the wolf

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.: ...

, the

Midgard In Germanic cosmology, Midgard (an anglicised form of Old Norse language, Old Norse ; Old English , Old Saxon , Old High German , and Gothic language, Gothic ''Midjun-gards''; "middle yard", "middle enclosure") is the name for Earth (equivalent ...

serpent

Jörmungandr In Norse mythology, Jörmungandr ( non, Jǫrmungandr, lit=the Vast gand, see Etymology), also known as the Midgard Serpent or World Serpent ( non, Miðgarðsormr), is an unfathomably large sea serpent or worm who dwells in the world sea, encir ...

, and the ruler of the dead Hel. Angrboda is about 3 kilometres in diameter, and orbits Saturn at an average distance of 20.636 Gm in 1107.13 days, at an inclination of 177° to the ecliptic, in a retrograde direction and with an eccentricity of 0.251.

References

{{DEFAULTSORT:Angrboda (Moon) Norse group Irregular satellites Moons of Saturn Discoveries by Scott S. Sheppard Astronomical objects discovered in 2019 Moons with a retrograde orbit