Helene 土衛(wèi)十二(中英)

Helene is the thirteenth of Saturn's known satellites:
    orbit: 377,400 km
    diameter: 33 km (36 x 32 x 30)
    Helene is the name of an Amazon who battled with Achilles.
    Discovered by Laques and Lecacheux in 1980 from ground-based observations.
    Helene is in Dione's leading Lagrange point and hence was sometimes referred to as "Dione B".
    土衛(wèi)十二是距土星第十三近衛(wèi)星：
    公轉(zhuǎn)軌道：377,400 千米
    衛(wèi)星直徑：33 千米 (36 x 32 x 30)
    Helene是與Achilles戰(zhàn)斗的亞馬遜人名。
    它是在1980年被地面天文臺(tái)的Laques和Lecacheux發(fā)現(xiàn)的。
    土衛(wèi)十二在Dione土衛(wèi)四的拉格朗日前點(diǎn)上，因此有時(shí)它被稱為“Dione B”。