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Miranda (luna)

Miranda
Miranda, kot ga je fotografiral Voyager 2
Miranda, kot ga je fotografiral Voyager 2
Odkritje
OdkriteljGerard Peter Kuiper
Datum odkritja1948
Značilnosti tira
129,390 km
Srednji polmer orbite
235.8 km (0.03697 Zemljinega)
Izsrednost0.0013
1.413479 d
Naklon tira4.232° (glede na Uranov ekvator)
ObkrožaUran
Fizikalne značilnosti
Srednji polmer
235.8 km (0.03697 Zemljinega)
700,000 km²
Prostornina54,835,000 km³
Masa6.59×1019 kg (1.103×10−5 Zemljine)
Srednja gostota
1.20 g/cm³
0.079 m/s2
0.19 km/s,
sinhrono
Albedo0.32
Temperatura~59 K

Miranda je enajsta od Uranovih znanih satelitov. Miranda je najbližja Uranu od njegovih velikih lun. Odkril jo je Kuiper leta 1948.

Miranda je bila hčerka čarovnika Prospera v Shakespearjevem The Tempest.

Miranda je sestavljena približno iz polovice ledu in polovice kamnitega materiala. Mirandino površje je prepredeno z zelo krateriziranim terenom z brazdami, dolinami in stenami (ena je visoka več kot 5 kilometrov).

Voyager 2 je bil prisiljen leteti blizu Urana, da bi dobil ustrezen pospešek za pot na Neptun in zaradi skoraj pravokotnega položaja Uranovega sistema na ekliptiko je bila samo Miranda dovolj blizu. Voyager 2 je šel zelo blizu Mirande in ker je osvetljenost Sonca tam zelo šibka (oddaljenost od Sonca je skoraj 3 milijarde km), so uvedli posebne ukrepe, da bi preprečili zabrisanost slik. To so naredili tako, da so med slikanjem obračali plovilo, da bi zmanjšali učinke premikanja na slikah. Slike imajo zato najboljšo ločljivost celotne odprave Voyager 2.

Zunanje povezave

[uredi | uredi kodo]


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Miranda (luna)
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