Circumzenithal arc
Taken by Laurent Laveder on October 9, 2015 @ Pluguffan, Brittany, France
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From my garden, I was not able to see the sundogs that give a clue that a circumzenithal arc is visible. But with my dog Gaïa, we did noticed it anyway, along with an upper tangent arc, a 46° halo, and even a part of the circumhorizontal arc (see second photo). This is the first time my 1 year old dog sees such a sight. Notice how a circumzenithal arc looks flat when view through an equirectangular projection (3rd photo)
Photographer's website:
http://www.pixheaven.net/circumzenithal/
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I can distinguish rather more than the circumzenithal arc. I recognize 22degs parhelia / 46degs supralateral arcs / parhelic circle / subhelic arc. This is a great display, unfortunately obscured by low cloud. See my forthcoming post in Space Weather Gallery. Peter Paul Hattinga Verschure
Posted by pphv 2015-10-11 12:14:13
 
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