Unusual Bisecting And Not Quite Circular Solar Halos

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Unusual bisecting and not quite circular solar halos
Taken by David E. Jones on March 21, 2014 @ Lawrenceville, Georgia, USA

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Camera Used: SONY DSC-H7
Exposure Time: 10/20000
Aperture: f/5.6
ISO: 80
Date Taken: 2014:03:22 00:34:11

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This afternoon, I glanced up through the sunroof in my car and noticed that there was a bright halo around the sun conjoined by another one that crossed over the main halo. When I got home, I took some photos and realized that even the main halo wasn't quite circular and appeared to be tight and colorful in one part, then split into a wider circle around a different part of the circle.

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Very nice!
I think they are a 22-degree halo, a circumscribed halo, and a parhelic circle.
The circles around the sun are a 22-degree halo (main, inner, circular) and a circumscribed halo (outer, partially elliptic). They come in contact with each other at the highest and lowest points. A circumscribed halo is one form of tangent arcs. Considering the size of parhelic circle, the solar altitude is high enough for the circumscribed halo to appear.
And the third circle, crossing the two and conjoining to the sun, is a parhelic circle. Its center is at the zenith.

Posted by shiram 2014-03-22 02:06:52

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