[at-l] Optical Phenomenon

[Jim Bullard]

It is known as Ulloa's Rings, a fairly rare phenomenon. An example can
be found in the photo here
<http://www.carlheilman.com/fine.art.landscapes.prints/1h982022n.jpg>.
I have never witnessed it myself. I first read of it in one of Galen
Rowell's books on mountain photography.

On 3/16/07, Ginny & Jim Owen <spiritbear2k at hotmail.com> wrote:
> I have a question -
> Today as we drove down the highway near Datil, NM, just before sundown, we
> observed something neither of us has ever seen before.  It was a clear
> afternoon, not a cloud in the sky.  As we drove through the mountains, the
> sun fell behind a small peak.  Light from the sun shone all around the peak.
>   However the light wasn't white, or orange - it was a perfect round
> rainbow, circling the mountain.  As we drove on, the sun appeared in part,
> but the rainbow circle remained.  It was really quite cool.  A few minutes
> later we passed behind a ridge and when we went beyond it, the sun was again
> in the sky with a normal white light around it.  About ten minutes later
> the sun went down and there was a slight orangy sunset.
>
> So the question is, does anyone know what that kind of solar rainbow halo is
> called?  Has anyone seen one?
>
> Ginny
>
> PS - for CDT-l - there is snow in the hills near Pie Town ;-)
>
>
>
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-- 
Jim Bullard
http://jims-ramblings.blogspot.com/