[AZ-Observing] Re: magnificent Moonbow, Thursday midnight

I was outside and pointed it out to the Mrs. (while out for a "healthy" walk
in the heavily polluted air) It appeared to be normal with reference to
being caused by ice crystals in the upper atmosphere but, did note it
appeared to have a "dulled" appearance with a brownish-red tinge to the edge
which I attributed to the nasty particulate matter in the air. I probably
was further influenced in this decision because having seen similar
"dulling" and coloration in the sunset just a few hours before..

(so I vote for an ice crystal halo viewed through an air pollution "filter")

Jimmy Ray

-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx]On Behalf Of Jeff Hopkins
Sent: Friday, December 16, 2005 12:28 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: magnificent Moonbow, Thursday midnight


While I have no doubt any halos were created by ice particles, the
pollution could be responsible for other phenomena.

I regret (not really) I was not outside in the pollution last night
to see it first hand.

Jeff

At 12:08 -0700 12/16/05, Brian Skiff wrote:
>      The 22-deg halo that Steve noted arises only from hexagonal ice
>crystals.  The local low-level crud is both too small (mainly) and
>also irregularly shaped.
>
>\Brian
--
Jeff Hopkins
HPO SOFT
http://www.hposoft.com/Astro/astro.html
Hopkins Phoenix Observatory
7812 West Clayton Drive
  Phoenix, Arizona 85033-2439 U.S.A.
www.hposoft.com
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