Circular halo imaged by Krystal Tyler.   The sun is blocked by the Tucson, University of Arizona Astronomy Building. ©Krystal Tyler, shown with permission.
    
 "..the wondrous world above
   our eyes but below
   the stars."    Krystal.
   
The sun was 70° high when this ice halo formed in cold and high cirrus. It could have been a 22° halo or a circumscribed from horizontal columns. Whatever, it is beautiful.
   
22° halos are often ascribed to "random" oriented crystals but true random orientations are not needed. Surprisingly, for this the most frequent of all the halos, we do not know for sure what crystals produce it.

22° halo Gallery