[AZ-Observing] Re: So I did see a triple nucleus
- From: "Bill VanOrden" <beevo1@xxxxxxx>
- To: <az-observing@xxxxxxxxxxxxx>
- Date: Fri, 2 Nov 2007 20:43:54 -0700
Ken Sikes and I were observing it Wed the 24th and we (or at least I)
was/were seeing a very distinct bright almost star like point in the center
area. I also noted an off set coma like appearance to the larger central
area.
"Not a trained comet observer, your mileage may very......"
Beevo
-----Original Message-----
From: az-observing-bounce@xxxxxxxxxxxxx
[mailto:az-observing-bounce@xxxxxxxxxxxxx]On Behalf Of Stan Gorodenski
Sent: Friday, November 02, 2007 8:25 PM
To: az-observing@xxxxxxxxxxxxx
Subject: [AZ-Observing] Re: So I did see a triple nucleus
An interesting fact, but it is not a valid explanation because the
distances involved, 3, 4 and 5.5 arc minutes are entirely too large. 3
arc minutes corresponds to 12 seconds of time. Remember, I reported that
with my 20 mm eyepiece it appeared as one nucleus. Going to my 16mm
eyepiece would not have stretched the image by 12 seconds of time from
one side to the other, or, equivalently, by 3 arc minutes! But, again,
even if what you are proposing was the explanation, which it isn't, it
is interesting that no one else in Az-Observing reported it because it
would have fooled anyone into believing they were observing a triple
nucleus. Whether it was a triple nucleus or a double with a star close
by, they probably didn't observe it for a number of reasons: a) possibly
poorer observing conditions at their observing site compared to mine, b)
smaller aperture telescope, c) a telescope with an inadequate figure on
it - recall the Meade LX200R's are reported to have smaller airy discs
compared to the classical Schmidt Cassegrain, d) they did not look
closely enough or long enough to catch it when the seeing improved for
that brief moment of time. If you made a mistake and meant arc seconds
instead, it still does not explain it because I am well aware of how
large a 3 arc second distance is from my observations of the double
double in Lyra which are separated by 2.3 and 2.2(?) arc seconds.
Stan
Sam&Anne wrote:
>On Nov 2, 2007, at 7:41 PM, Stan Gorodenski wrote:
>
>
>
>>This was on Oct 24th. This was a visual observation. I did not use a
>>camera. One person in S&T's report had thought of a star shining
>>through, but checked it out and there were no stars in the area.
>>
>>
>
>at 2100L, there were three 11th mag stars within 3 arcmin from the
>nucleus (based on MPCORB elements). They formed an approx isosceles
>triangle, with two legs of 4 arcmin, and the other being about 5.5.
>
>I did not observe the comet with a telescope back then, so I can't
>say if these stars had anything to do with your triple
>nucleus. ...............sam
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