[AZ-Observing] Re: Saturday Antennas report
- From: "Wayne (aka Mr. Galaxy)" <mrgalaxy@xxxxxxxx>
- To: az-observing@xxxxxxxxxxxxx
- Date: Mon, 7 Feb 2011 07:46:06 GMT
15480 Empire Rd.
Benson, AZ 85602
hm ph: 520-586-2244
Hi Paul,
The redness may have been caused by dust in the atmosphere since you said it
was windy. I think clouds act like neutral density filters. Depending on how
thick the clouds are determines the amount of light that is attenuated, but
they don't absorb different wavelengths of light preferentially.
Clear skies,
Wayne (aka Mr. Galaxy)
---------- Original Message ----------
From: Paul Lind <pulind@xxxxx>
To: <az-observing@xxxxxxxxxxxxx>
Subject: [AZ-Observing] Saturday Antennas report
Date: Sun, 6 Feb 2011 21:58:52 -0700
Folks,
By Saturday afternoon many observers had left the Antennas site because of
lousy skies, frostbite, gale force winds, the encroaching moon, etc. When I
arrived, Al Stiewing and Lori and Mitch Prause were still there. We had a
great time even though the sky was marginal. To start things off right, Lori
served wonderful beef taco-salad dinner in their spacious trailer. There was
fruit on the side, and that was followed by brownies, pie, and ice cream,
...and then hot chocolate!
After recovering from sugar shock everyone got started observing (actually
everyone was taking photos). The sky was apparently covered with thin cirrus
clouds that weren't really visible. Both Al and I thought the sky looked
"soft".
I'm not sure of the official way to evaluate transparency. There was haze
around the crescent moon, but the Milky Way was visible all night. I'd give
it about a 4 to 5.
By 10 pm the Flaming Star Nebula was very high so I tried a photograph. After
stacking the sub-exposures I found that the color balance was skewed way off to
the red, and was hard to correct. Does anyone know if this can be caused by
cirrus clouds? It sounds reasonable. The image is posted at;
http://www.pbase.com/paullind/flaming_star_nebula
Paul Lind
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