Ymir (moon)
moon of Saturn
Ymir, or Saturn XIX, is the second-largest retrograde irregular moon of Saturn.
Discovery and naming
It was discovered by Brett J. Gladman, et al. in 2000, and given the temporary designation S/2000 S 1. Joint with Paaliaq, its discovery in 2000 was the first detection of an irregular moon of Saturn after Phoebe, discovered a century earlier.
It was named in August 2003 after Ymir, who in Norse mythology is the ancestor of all the Jotuns or frost giants.
Orbit
The average distance from Ymir to Saturn is approximately 23 million kilometers. This gives it one of Saturn's largest known satellite orbits, with a period of 3.6 years, moving in a retrograde direction. Its orbital inclination is 173° to the ecliptic, and its eccentricity is 0.337. Its orbit changes continuously due to solar and planetary perturbations.
Due to its orbital inclination, Ymir belongs to the Phoebe subgroup, a retrograde group of moons that orbit Saturn at a distance of 13 million to 27 million kilometers, have orbital inclinations between 172.5 and 180, and have eccentricities of about 0.1 and 0.5.
“Ymir (moon)” enters the record as moon of Saturn. Crown Archives preserves that source wording while asking what Ymir, moon and Saturn can confirm, complicate or overturn.
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Named sources, stable identifiers and responsible institutions provide the strongest route from overview to verifiable evidence. The source revision retrieved here is dated Sep 3, 2026. The linked authority identifier is Q18238. None of the 0 selected statements returned an explicit reference. The first chronological checks are 2000 and 2003.
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This entry incorporates text from “Ymir (moon)” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.