Enkelad Enceladus snimljen orbiterom
Cassini , oktobar 2015.
Datum otkrića 28. avgusta 1789 Designation
Saturn II Izgovor Imenovan po
Ἐγκέλαδος Egkelados Adjectives Enceladean 7005237948000000000♠ 237.948 kmEccentricity 7001470000000000000♠ 0,00477006137021800000000♠ 1,370218 dSatellite of Saturn Mean radius
7003252100000000000♠ 252,1± 0,2 km (7002395000000000000♠ 0,0395 Earths, 7003145100000000000♠ 0,1451 Moons)7004160970000000000♠ 1,6097± 0,0038 g/cm3 1.134 m/s2 (7002116000000000000♠ 0,0116 g ) 7003330500000000000♠ 0,3305± 0,0025Šablon:V2 km/s (860.4 km/h)Sinhrona 0 Albedo 7003137500000000000♠ 1,375± 0,008 (geometrijski na 550 nm) or 7001810000000000000♠ 0,81± 0,04 (Bond )11.7 Trace, significant spatial variability Composition by volume 91% vode pare 4% nitrogen 3.2% ugljen-dioksid 1.7% metan
Enkelad (Enceladus ) je prirodni Saturnov satelit kojeg je 1789. otkrio astronom William Herschel . Ime je dobio po gigantu Enkeladu iz starogrčke mitologije . Ovaj satelit ima drugo ime Saturn II .
Karakteristike
Enkelad obilazi Saturn svakih 32 h 53 m 7 s, ima prosječni prečnik od 498,9 km i masu od 8,6×1019 kg . Prosječna gustoća Enkelada iznosi 1,3 g/cm3 . Mjerenja obavljena od strane svemirske letjelice Cassini-Huygens ookazala su da je ovaj satelit napravljen većinom od leda , vode i možda male količine kamena i metala .
Početkom 2006. NASA -ina letjelica Cassini snimila je erupcije gejzira na površini, vjerovatno sastavljene i od tekuće vode .
Reference
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