She fer jeh eaystyn Jupiter eh Ganymede (Jupiter III). She eshyn yn eayst smoo er mooadys as er glout mastey eaystyn Chorys ny Greiney. Y nuyoo corpane (goaill stiagh y Ghrian hene) smoo ayns Corys ny Greiney, she Ganymede y fer smoo gyn aeraght ondagh. T'eh 5,268 km (3,273 mi) er crantessen as, rere shen, t'eh 26% ny smoo na Curain er thummid, ga nagh vel eh agh 45% cha mooar as Curain.[3] Ta cree meainagh echey as faghteyr moment y neughleashaght sloo mastey dagh corpane creoi 'sy Ghrianchorys. She Ganymede yn un eayst as ream magnaidagh echey. Magh ass Jupiter, she Ganymede y shiaghtoo eayst as y trass mastey ny h-eaystyn Galileagh, y chied phossan jeh corpaneyn va feddynit as ad cruinlaghey planaid elley.[4] Ta Ganymede cruinlaghey Jupiter ayns mysh shiaght laaghyn as ta aavuilley cruinlagh echey er 1:2:4 lesh ny h-eaystyn Europa as Io, er lheh.
Ganymede  |
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 |
| Enmyn elley | Jupiter III |
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| Sorçh | eayst Jupiter, eayst jeh glout planaidagh as regular moon (en)  |
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| Feddynit magh ec | Galileo Galilei  |
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| Date feddyn magh | Jerrey Geuree 7, 1610 |
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| Epennym | Ganymede |
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| Moir-red | Jupiter |
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|
| Apoapsis | 1,071,600 km |
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| Periapsis | 1,069,200 km |
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| Essyl vooar a | 1,070,400 km |
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| Corrid e | 0.0013 |
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| Amm cruinlagh P | 7.154 d |
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| Cleayn i | 2.214 ° |
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|
| Craue raadeeoil | 2,634.1 km |
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| Mooadys baghtal (V) | 4.61 |
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| Eaghtyr y vaare | 87,000,000 km² |
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| Glout | 148.148 Yg[1] |
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| Mean-ghlooaght | 1.936 g/cm³ |
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| Ym-hayrn eaghtyragh | 1.428 m/s² |
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| Albedo | 0.43 |
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| Çhiassid eaghtyragh | |
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| Ayrn jeh | ny h-eaystyn Galileagh |
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