ice halos and other optics

Halos 20. May

In the afternoon the clouds came. Parhelion was blindingly bright. I followed as the same cloud reached the 120° parhelion position and there was an intensity increase which soon attenuated. The last image shows two photos taken 88 seconds apart, the 120° parhelion is seen in the left photo, in the right photo the cloud has already moved further and the distant parhelion is no more seen. I think the best part of the cloud did not pass the 120° parhelion location, or it would have been brighter.

Day’s halos:

  • 22° upper tangent arc
  • 22° halo (just a small patch in the second photo)
  • parhelia
  • pillar
  • circumznith arc
  • 120° parhelion

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