FreeLists / az-observing / [AZ-Observing] Re: Geminids

["L Knauth" <Knauth@xxxxxxx>]

An advantage to your "nap until moonset" approach is possibly that the sky 
tends to get a lot better several hours after sunset.  At Hovatter Norte, we 
often note even on the clearest nights that everything below about 30 degrees 
is decidedly less black than above after twilight and that this gradually 
descends down to the horizon as the evening progresses.  By midnight, it can be 
really black all the way down if we aren't looking toward any kind of city.  My 
own prejudice is that this is the skyglow generated by UV blasting the upper 
atmosphere all day.  Toward midnight, ions lifted to higher energy states have 
pretty much cascaded down to lower states and quit giving off light.  Anyone 
know if this is a reasonable explanation?  I haven't looked into the official 
version of whether you can see skyglow. The observation is certainly not 
something we are imagining.
BTW: If the predicted clearing trend continues, I am doing a one-nighter at 
Hovatter Norte Wednesday night.

Paul Knauth


-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx on behalf of AJ Crayon
Sent: Tue 12/11/2007 3:06 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: Geminids
 
For a long time I have wanted to do an early moon rise observing run.  That 
is to say, rest just after sunser and while the moon is up.  Then, about 
time moon sets, get up and observe.  Sounds like that would be an excellent, 
and different, kind of session.

If I were to get serious about observing the Geminids going east of aurora 
Phoenicis would have somr sort or priority, with due diligence to Tom 
Polakis's note about peaks and rises.

Clear skies anyways,
aj

----- Original Message ----- 
From: "Jack Jones" <Telescoper@xxxxxxx>
To: "AZ-Observing" <az-observing@xxxxxxxxxxxxx>
Sent: Tuesday, December 11, 2007 12:30 PM
Subject: [AZ-Observing] Geminids


Should be clear for the Geminids Thurs and Fri night. Any all-nighters going 
on? Moonset 10:10 pm on Friday.
Jack

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