46度晕是一种很罕见的出现在太阳附近的晕。当太阳与水平线的夹角呈15-27°时，46度晕很容易与上侧弧与外侧弧混淆。[1]
46度晕与22度晕相似，但更宽更淡。成因是阳光穿过六角形冰晶时，[2] 晶体之间90°的夹角使得其色彩分布比22度晕更为分散。[3]
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