Parhelic Circle

A long section of arc is quite distinctive but small segments can be hard to distinguish from streaks of cirrus.

The same crystal type that forms sundogs also makes for the best parhelic circle, but the tolerance in orientation is much tighter for the parhelic circle so it is not seen as frequently.

This portion of parhelic circle starts from a weak sundog (overexposed on left). This made it much easier to identify among all the other wisps.

Zooming in on the sundog shows the beginning of the parhelic circle.

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