[げんげつ, gengetsu] (n) (See 幻日) paraselene; moon dog; moondog (bright spot on either side of the moon caused by refraction of moonlight through ice crystals in the atmosphere)
[げんじつ, genjitsu] (n, adj-no) (See 幻月) parhelion; sun dog; sundog (bright spot on either side of the sun caused by refraction of sunlight through ice crystals in the atmosphere)