Ymir (satelit)

Descoperire^[1]
Ymir
Imagine de descoperire a lui Ymir făcută de Observatorul La Silla în august 2000
Descoperit de	Brett J. Gladman^⁠(d)
Loc descoperire	Observatoire de la Cote d'Azur^⁠(d)
Dată descoperire	2000
Denumiri
Denumire MPC	Saturn XIX
Pronunție	/'i.mir/
Denumit după	Ymir
Nume alternative	S/2000 S 1
Atribute	Ymirian /i.mi.ri'an/
Caracteristicile orbitei^[2]
Axa semi-majoră	23.040.000 km
Excentricitate	0,3349
Perioadă orbitală	3,6 ani (1315,14 zile)
Anomalia medie	244,521°
Înclinație	173,125°
Longitudinea nodului ascendent	194,086°
Argumentul perihelion	22,668°
Sateliți	Saturn
Caracteristici fizice
Diametrul mediu	7004190000000000000♠19+50% −30% km^[3]
Perioadă de rotație	11,9222±0,00002 ore^[3] 11 ore 55 m 20 s^[4]
Albedo	0,06^[5]
Magnitudinea aparentă	21,7^[6]

Ymir /'i.mir/, sau Saturn XIX, este un satelit neregulat retrograd al lui Saturn. A fost descoperit de Brett J. Gladman^⁠(d), et al. în 2000, și a primit denumirea temporară S/2000 S 1. A fost numit în august 2003, din mitologia nordică, unde Ymir este strămoșul tuturor Jotunilor sau giganți de brumă. ^[7]

Are nevoie de 3,6 ani pământești pentru a finaliza o orbită în jurul lui Saturn. Dintre sateliții care au nevoie de mai mult de 3 ani pământești pentru a-l orbita Saturn, Ymir este cel mai mare, având aproximativ 18 kilometri (11 mi) în diametru.

Ymir fotografiat de CFHT^⁠(d) pe 23 septembrie 2000

Referințe

^ Brian G. Marsden (25 octombrie 2000). „IAUC 7512”. IAU. Accesat în 8 ianuarie 2011.
^ Jacobson, R.A. (2007) SAT270, SAT271 (28 iunie 2007). „Planetary Satellite Mean Orbital Parameters”. JPL/NASA. Accesat în 14 februarie 2008.
^ ^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., ed. 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. pp. 409–434. Bibcode:2018eims.book..409D. doi:10.2458/azu_uapress_9780816537075-ch020. ISBN 9780816537075.
^ Nicholson, P. D. 2001
^ Sheppard, Scott S. „Saturn's Known Satellites”. Department of Terrestrial Magnetism. Accesat în 14 februarie 2008.
^ Daniel W. E. Green (8 august 2003). „IAUC 8177: Sats OF (22); Sats OF JUPITER, SATURN, URANUS”. IAU. Accesat în 8 ianuarie 2011.

Legături externe

MPEC 2000-Y15: S/2000 S 1, S/2000 S 2, S/2000 S 7, S/2000 S 8, S/2000 S 9 (efemeride din 19 decembrie 2000)
Efemeride IAU-NSES
Sateliții cunoscuți ai lui Saturn (de Scott S. Sheppard^⁠(d) )
Site-ul web Ymir (de Tilmann Denk)
Commons
Wikimedia Commons conține materiale multimedia legate de Ymir (satelit)

v • d • m Planeta Saturn

Listă de sateliți	Sateliții naturali ai lui Saturn

Sateliți	Pan · Atlas · Iapetus · Calipso · Rhea · Mimas · Telesto · Helena · Dione · Enceladus · Titan · Phoebe · Prometeu

Inele	Inelele lui Saturn

Nave spațiale	Cassini-Huygens · Pioneer 11 · Voyager 1 · Voyager 2

Misiuni	Misiunea Saturn · Titan and Enceladus Mission · Explorarea satelitului Titan · Kronos · Titan Mare Explorer · Titan Saturn System Mission

Proiect · Portal Saturn · Portal Astronomie · Portal Sistemul Solar

v • d • m Sateliții naturali din Sistemul solar

Sateliți planetari	Tereștri • Marțieni • Jovieni • Saturnieni • Uranieni • Neptunieni

Alte sisteme de sateliți	Plutonieni • Eridieni

Cei mai mari sateliți	Ganymede • Titan • Callisto • Io • Luna • Europa • Triton Titania • Rhea • Oberon • Iapetus • Charon • Umbriel • Ariel • Dione • Tethys

Proiect · Portal

v • d • m Sateliții planetei Saturn

Păstori de inel	S/2009 S 1 · Sateliți minori din inele · Pan · Daphnis · Atlas · Prometheus · Pandora

Sateliți coorbitali	Epimetheus · Janus

Inelul G	Aegaeon

Alkyonidele	Methone · Anthe · Pallene

Mari, interiori (cu troieni)	Mimas · Enceladus · Tethys (Telesto · Calypso) · Dione (Helene · Polydeuces)

Mari, exteriori	Rhea · Titan · Hyperion · Iapetus

Grupul Inuit	S/2019 S 1 · Kiviuq · Ijiraq · Paaliaq · Saturn LX · S/2004 S 31 · Siarnaq · Tarqeq

Grupul Nordic	Phoebe · Skathi · S/2004 S 37 · S/2007 S 2 · Skoll · S/2004 S 13 · Hyrrokkin · Greip · Mundilfari · S/2006 S 1 · S/2007 S 3 · Gridr · Bergelmir · Narvi · Jarnsaxa · S/2004 S 17 · Suttungr · Eggther · Hati · S/2004 S 12 · Bestla · Farbauti · Thrymr · Angrboda · Beli · Aegir · Gerd · S/2004 S 7 · Gunnlod · Skrymir · S/2004 S 28 · Alvaldi · Kari · Geirrod · S/2006 S 3 · Fenrir · Surtur · Loge · Ymir · S/2004 S 21 · S/2004 S 39 · S/2004 S 36 · Thiazzi · Saturn LXIV · Fornjot · Saturn LVIII

Grupul Galic	Albiorix · Bebhionn · Erriapus · Tarvos

Sateliți exteriori prograzi	S/2004 S 24

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