[AZ-Observing] Weather - and the AAMM

  • From: "David M. Douglass" <dmdouglass@xxxxxxxxxxxxxxx>
  • To: <az-observing@xxxxxxxxxxxxx>
  • Date: Tue, 5 Mar 2013 10:33:23 -0700

Wow !! Last night was wonderful. I was in the backyard obs from 7:00 until 
about 2:00 AM this morning. Thin clouds came in about 1:15-1:30. Saw them first 
in the southern skies.  But I got lots of work done on my Messier galaxy 
comparison project. I have now re-imaged all 40 of the Messier Galaxies using a 
6 frame stack of 2-min guided exposures. This is from the back yard obs 
(DaHut). The observation sheets are all prepared too. Over the next day or so, 
I will get all of the images processed.

The next step will be to re-image again, but from a “dark” site, such as the 
one I have found N and W of Superior (closer than Antenna, good for camping, 
and DARK DARK DARK  Measures 21.5 on the SQM – at the house, from inside the 
obs, I measure 18.5.  My 18.5 at the house is “sort of” cheating…. I take the 
reading from inside the obs.  If I were to step outside, and a couple of steps 
away, the number goes down “a bunch”…..

Anyway, after I re-image again from a dark site, I will finish the observation 
sheets, which will show both Tempe image, and dark site image. Should make a 
nice comparison. Maybe a neat presentation. Would only use 4 or 5 of the most 
dramatic, and not all 40 – they will be on the website for anyone to see.

Weather not too good today…. BUT……
Wed and Thr look pretty good. Showing a forest of “0” clouds.  Then rain for a 
couple of days.
The Messier is “almost” in the 10 day window…… hope it clears up.

David M. Douglass
dmdouglass@xxxxxxxxxxxxxxx (secondary)
david@xxxxxxxxxxxxxxx (main)
Cell  (602) 908-9092



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