What is Ymir (moon)?
{{Infobox Planet | name = Ymir | bgcolour = #ffa812 | discovery_ref = <ref name=discovery>{{cite web |date=2000-10-25 |title=IAUC 7512 |publisher=IAU |author=Brian G. Marsden |url=http://www.cbat.eps.harvard.edu/iauc/07500/07512.html |accessdate=2011-01-08}}</ref> | discoverer = [[Brett J. Gladman]] | discovery_site = [[Observatoire de la Cote d'Azur]] | discovered = 2000 | alt_names = S/2000 S1 | adjectives = Ymirian | orbit_ref = <ref name=JPL>{{cite web |date=2007-06-28 |title=Planetary Satellite Mean Orbital Parameters |publisher=JPL/NASA |author=Jacobson, R.A. (2007) SAT270, SAT271 |url=http://ssd.jpl.nasa.gov/?sat_elem#saturn |accessdate=2008-02-14}}</ref> | semimajor = 23,040,000 km | eccentricity = 0.3349 | period = 3.6 [[Julian year (astronomy)|yr]] (1315.14 d) | inclination = 173.125° | mean_anomaly = 244.521° | arg_peri = 22.668° | asc_node = 194.086° | satellite_of = [[Saturn (planet)|Saturn]] | dimensions = 18 km<ref name=sheppard>{{cite web |title=Saturn's Known Satellites |publisher= Department of Terrestrial Magnetism |author=[[Scott S. Sheppard]] |url=http://www.dtm.ciw.edu/users/sheppard/satellites/satsatdata.html |accessdate=2008-02-14}}</ref> | mass = 5.1{{e|15}} kg<ref name=estimate>assume radius of 9 km; [[Volume#Volume formulas|volume of a sphere]] * assume density of 1.7g/cm³ (though it could be a loose [[rubble pile]]) yields a mass of 5.1e15 kg and an escape velocity of 8.7 [[Metre per second|m/s]] (31 km/h)</ref> | escape_velocity = 8.7 [[Metre per second|m/s]] (31 km/h)<ref name=estimate/> | albedo = 0.06<ref>Nicholson, P. D. 2001</ref> | magnitude = 21.7<ref name=sheppard/> }} '''Ymir''' ({{IPAc-en|ˈ|ɪ|m|ɪər}} {{respell|IM|eer}}), or '''Saturn&nbsp;XIX''' is a [[satellite (natural)|moon]] of [[Saturn (planet)|Saturn]]. It was found by [[Brett J. Gladman]], et al. in 2000, and given the designation '''S/2000&nbsp;S&nbsp;1'''. It was named in August 2003, from [[Norse mythology]], where [[Ymir]] is the ancestor of all the [[Jotun]]s or frost giants.<r