iridescent clouds
Taken by Theo Wellington on September 8, 2017 @ North Myrtle Beach, SC, USA
Click photo for larger image
  Camera Used: RICOH IMAGING COMPANY, LTD. PENTAX K-3
Exposure Time: 1/1250
Aperture: f/9.0
ISO: 200
Date Taken: 2017:09:16 12:24:46
  
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Details:
Short lived display of iridescence on high clouds, seen from North Myrtle Beach. Pentax K-3, ISO 200, f/9, 1/1250s.
Photographer's website:
http://astrodork.name/gallery3
Comments
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Probably this was not a real iridescent cloud, since the colours appear in cirrus type cloud which use to exist of ice crystals. The colours are caused by refraction of sunlight rays in these cirrus cloud ice crystals and are therefore better assigned in the halo phenomena family. I am quite sure that the colours are a trace of the circumhorizontal arc, which is one out of the halo phenomena group caused by refraction in 90 degrees refracting angles.
Posted by pphv 2017-09-17 14:36:26
 
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