[AZ-Observing] Re: Moon Grazing Star SAO 184540/184541

  • From: <kevin.kozel@xxxxxxx>
  • To: az-observing@xxxxxxxxxxxxx
  • Date: Fri, 13 Sep 2013 17:33:38 -0400

Richard,
I'll give it a try each time I watch for the event.  Thanks for the heads up.
KK
---- Richard Harshaw <rharshaw2@xxxxxxx> wrote: 

=============
Kevin, while you're at it, you can also go for an occultation of a double star 
that is too close to split visually. When the moon occults an "occultation 
binary", the light does not wink out all at once, but does a "step function" 
fade-- say, half as bright for a second or so, then out.  Really cool to watch, 
especially as the two stars are often less than 0.10" apart!



Richard Harshaw
The Arizona Star Splitter


-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx 
[mailto:az-observing-bounce@xxxxxxxxxxxxx] On Behalf Of kevin.kozel@xxxxxxx
Sent: Friday, September 13, 2013 7:42 AM
To: az-observing@xxxxxxxxxxxxx
Cc: Tom Polakis
Subject: [AZ-Observing] Re: Moon Grazing Star SAO 184540/184541

Thanks, Tom.
It was really cool to see just the same.  I'll be watching from now on, and 
checking the charts more often also.
KK
---- Tom Polakis <tpolakis@xxxxxxx> wrote: 

=============
Kevin,

You saw an occultation.  In a true *grazing* occultation, the star disappears 
and reappears more than one time, typically over a period of less than a 
minute.  Since the star you were observing disappeared for only five minutes, 
you would have been able to see a graze not very far south of your location.

Back in SAC's salad days, trips were organized in which large groups of us 
would set up at regularly spaced stations along a graze path, and do timings 
that could be used to refine the profile of the moon's limb.

Tom



---- kevin.kozel@xxxxxxx wrote: 
 
> If anyone can confirm that this really was a moon grazer to this beginner 
> grazer gazer, please feel free to let me know. 
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