[AZ-Observing] Re: Moon Grazing Star SAO 184540/184541
- From: "Richard Harshaw" <rharshaw2@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Fri, 13 Sep 2013 07:45:46 -0700
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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