Above are two stages of a display and they both have parhelic circle. I sort of understand the parhelic circle in the upper photo as there is passable parhelia (noting, however, that they have no horizontal extent). But it beats me that in the lower photo parhelic circle appears without parhelia. Below is full view of the latter situation in single 30 second exposure (the two images above are stacks of some 3 minute intervals). Photos were taken on the night of 12/13 December 2016 in Oikarainen, Rovaniemi. Some odd radius there too.
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