n.幻月
Analogous to a sundog or parhelion, the paraselene is produced by moonlight shining through thin, hexagonal-shaped ice crystals in high cirrus clouds. 类似环日的形成一样，在高空卷云中，月光通过稀薄、具有六边形状的冰晶时产生了幻月。
paraselene circle 幻月环
