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I still don't know if it is possible for a supernumerary to look so much
like the primary. Usually they are washed out somewhat, showing just the
green and violet part of the spectrum. But I agree that since the bow
Sandy saw was circular like the primary, the oblate droplet theory doesn't
work.
By coincidence, while I was processing rolls of film today of the lunar
eclipse, I found a photo I took in March of a cloud bow showing nice
supernumeraries. It is at
http://www.weather-photography.com/Photos/photo.php?cat=optics&id=w-499-10
.
Two or maybe three supernumeraries can be seen. The order of color seems
to be reversed from the main cloud bow but that is an illusion - the white
band between the red and blue makes it look as if the red band of the 2nd
supernumerary is part of the 1st supernumerary.
Harald
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