Ymir (moon)
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![]() Discovery image of Ymir taken by the La Silla Observatory in August 2000 | |
Discovery[1] | |
---|---|
Discovered by | Brett J. Gladman |
Discovery site | Observatoire de la Cote d'Azur |
Discovery date | 2000 |
Designations | |
Designation | Saturn XIX |
Pronunciation | /ˈiːmɪər/,[2] /ˈɪmɪər/[3] |
Named after | Ymir |
S/2000 S 1 | |
Adjectives | Ymirian /ɪˈmɪəriən/[4][5] |
Orbital characteristics[6] | |
23,040,000 km | |
Eccentricity | 0.3349 |
3.6 yr (1315.14 d) | |
244.521° | |
Inclination | 173.125° |
194.086° | |
22.668° | |
Satellite of | Saturn |
Group | Norse group |
Physical characteristics | |
Mean diameter | 19+50% −30% km[7] |
11.9222±0.00002 h[7] 11 h 55 m 20 s[8] | |
Albedo | 0.06[9] |
21.7[10] | |
Ymir /ˈiːmɪər/, or Saturn XIX, is a retrograde irregular moon of Saturn. It was discovered by Brett J. Gladman, et al. in 2000, and given the temporary designation S/2000 S 1. It was named in August 2003, from Norse mythology, where Ymir is the ancestor of all the Jotuns or frost giants.[11]
It takes 3.6 Earth years to complete an orbit around Saturn. Of the moons that take more than 3 Earth years to orbit Saturn, Ymir is the largest, at about 18 kilometres (11 miles) in diameter.[10]
![](http://webcf.waybackmachine.org/web/20220802132650im_/https://upload.wikimedia.org/wikipedia/commons/thumb/d/de/Ymir-CFHT.gif/220px-Ymir-CFHT.gif)
Ymir imaged by the CFHT on 23 September 2000
References[edit]
- ^ Brian G. Marsden (2000-10-25). "IAUC 7512". IAU. Retrieved 2011-01-08.
- ^ "Ymir". Merriam-Webster Dictionary.
- ^ Merriam-Webster's Encyclopedia of Literature. 1995.
- ^ Budd (1898). "Norse Mythology". St. Mary's Hall lectures: and other papers. p. 84. Because the -r is an inflectional ending, and the oblique stem is Ymi (as in Modern Norse Yme), one might expect the English adjective to be ?Ymian, but that is perhaps too short a word to be easily intelligible.
- ^ James Hall III (2015). Moons of the Solar System. p. 107.
- ^ Jacobson, R.A. (2007) SAT270, SAT271 (2007-06-28). "Planetary Satellite Mean Orbital Parameters". JPL/NASA. Retrieved 2008-02-14.
- ^ a b Denk, T.; Mottola, S. (2019). Cassini Observations of Saturn's Irregular Moons (PDF). 50th Lunar and Planetary Science Conference. Lunar and Planetary Institute.
- ^ T. Denk, S. Mottola, F. Tosi, W.F. Bottke, D.P. Hamilton (2018). Schenk, P.M.; Clark, R.N.; Howett, C.J.A.; Verbiscer, A.J.; Waite, J.H. (eds.). "The Irregular Satellites of Saturn" (PDF). Enceladus and the Icy Moons of Saturn. Space Science Series, The University of Arizona Press, Tucson, AZ. Chapter 20: 409–434. doi:10.2458/azu_uapress_9780816537075-ch020. ISBN 9780816537075.
{{cite journal}}
: CS1 maint: multiple names: authors list (link) - ^ Nicholson, P. D. 2001
- ^ a b Sheppard, Scott S. "Saturn's Known Satellites". Department of Terrestrial Magnetism. Retrieved 2008-02-14.
- ^ Daniel W. E. Green (2003-08-08). "IAUC 8177: Sats OF (22); Sats OF JUPITER, SATURN, URANUS". IAU. Retrieved 2011-01-08.
External links[edit]
![](http://webcf.waybackmachine.org/web/20220802132650im_/https://upload.wikimedia.org/wikipedia/en/thumb/4/4a/Commons-logo.svg/30px-Commons-logo.svg.png)
Wikimedia Commons has media related to Ymir (moon).
- MPEC 2000-Y15: S/2000 S 1, S/2000 S 2, S/2000 S 7, S/2000 S 8, S/2000 S 9 (2000 Dec. 19 ephemeris)
- Ephemeris IAU-NSES
- Saturn's Known Satellites (by Scott S. Sheppard)
- Ymir website (by Tilmann Denk)