Encladus

Enceladus ist überwiegend aus Wassereis zusammengesetzt. Mit 2,13 g/cm3 weist er die größte Dichte aller großen Monde. In seinem Inneren müssen daher größere Anteile an dichtem Material vorhanden sein, etwa silikatisches Gestein; es handelt sich demnach um einen differenzierten Körper. Oberfläche Enceladus ist außergewöhnlich hell, da er großflächig mit reinem Wassereis bedeckt ist, das 99 % des eingestrahlten Sonnenlichts reflektiert. Dies ist die höchste Albedo eines Himmelskörpers im Sonnensystem; sie übertrifft sogar die Reflektivität von frisch gefallenem Schnee. Aufgrund der hohen Reflexion des Sonnenlichts herrschen auf Enceladus meist Temperaturen unter −100 °C. Auf seiner Oberfläche konnten verschiedene Terrains ausgemacht werden. Neben Einschlagkratern sind flache Ebenen sowie ausgeprägte Brüche und Verwerfungen sichtbar. Ein Teil seiner Oberfläche scheint mit einem geschätzten Alter von 100 Millionen Jahren relativ jung zu sein. Dies deutet darauf hin, dass Enceladus geologisch aktiv ist. Ursache ist offensichtlich Kryovulkanismus (Kältevulkanismus), bei dem Wasser aus dem Innern des Mondes austritt und sich über die Oberfläche verteilt. Enceladus ist der kleinste bekannte Körper im Sonnensystem mit einer geologischen Aktivität dieser Art. Der größte benannte Krater auf Enceladus, Ali Baba, hat einen Durchmesser von lediglich 34 km. Das längste Grabensystem, Samarkand Sulci, erstreckt sich über 360 km. Es gibt eine imperiale Bodenstation für Eisförderung. Die Station beherbergt 20 Imperiale Soldaten. Es befindet sich immer 1 imperialer Kreuzer und ein Transportkreuzer im Orbit.

+++ GEHEIM +++

INAKTIVE XENOS:
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Große Halbachse

237.948 km

Bahnneigung

0,019°

Umlaufzeit

1,370217824 d

Mittlere Orbitalgeschwindigkeit

12,6353 km/s

Scheinbare Helligkeit

11,8 mag

Mittlerer Durchmesser

504,2 km

Masse

1,08022 ± 0,00101 × 1020 kg

Oberfläche

798.648 km2

Mittlere Dichte

1,608 ± 0,003 g/cm3

Siderische Rotation

1,370217824 Tage

Achsneigung

0°

Fallbeschleunigung an der Oberfläche

3,114 m/s2

Normfallbeschleunigung, auf g

n = 9,80665 m/s²

Oberflächentemperatur

-128 °C bis -20 °C Keine Atmosphäre