Halo display with pyramide crystals 4.9.2012

Observed phenomena: Halo phenomena
Light source: Sun
Origin: High clouds (cirrostratus)
Observed halo forms:

  • 22° halo
  • 9° halo [Van Buijsen]

Date: 4.9.2012
Time: 12.33-12.43
Observing place: Kuru, Ylöjärvi, Finland
Observing method: Photography
Technical information about photographing equipment: Camera: Canon EOS 1100D, lens: Canon EF-S 18-55mm IS

Description: I noticed a diffuse 22° halo in the sky, which usually is a sign of odd-radius halos caused by pyramide. And when observing closely, I noticed that there was a small, odd-radius halo ring close to the Sun! This halo ring was the 9° halo [Van Buijsen], and this was the first observation of this halo form in my life so far! It is possible, that there was also other halos caused by pyramide crystals, but taking series of photos and stacking them would have been required for confirming this. Unfortunately I didn’t have time to take more photos, so this time the observed halo forms were 22° halo and 9° halo [Van Buijsen].


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