Sundogs (also known as mock suns or, more technically, parhelia) sometimes can be seen 22° to the left and/or right of the sun, depending on the presence of thin high clouds that contain the right kind of ice crystals. They result from the refraction of sunlight through one short edge, then another, of platy, hexagonal crystals. Since the parhelia are horizontal with respect to the sun, a large number of the crystals need to be oriented horizontally at the time light passes through. A faint 22° halo—formed as light refracts through randomly aligned crystals—connects the sundogs. At the top of the halo, a faint upper tangent arc appears. This memorable display of atmospheric optics began about half an hour earlier with a classical circumzenithal arc, which was largely gone by the time of this slide.
Norman OK (10 Feb 5) Looking WSW
35.2374, -97.4627