Hi Nick,

Thanks for the feedback and the link to your image. I’ll continue to observe it with large telescopes for as long as possible. There was a lot of subtle detail in the core tonight and I had the image of a very active nucleus and core.

Cheers,
-Paul

--
Sent on the move.

> On 21 Oct 2024, at 23:31, Nick James <ndj@nickdjames.com> wrote:
>
> Paul,
>
> Thanks for the report and drawing and thanks, Wayne, for the image.
>
> I managed to image the comet a couple of nights ago on the 19th using my HD11 + ASI6200 keeping the exposure short so as to not saturate the central condensation. The FoV is 45 x 30 arcmin, N up. Processing the stacked image is hard since the core is so much brighter than the outer coma and tail. This image:
>
> https://nickdjames.com/Comets/2024/2023a3_20241019_181006_ndj.jpg
>
> attempts to show the full dynamic range but I am not entirely happy with it yet. It uses a mild unsharp mask and a log stretch. The insets show the a log stretch without unsharp mask and a Larsen-Sekanina filter with a rotation angle of 10 deg.
>
> There is clearly a lot going on in the central part of the coma and visual observers with large telescopes can probably pick up a lot of this. Imagers often tend to saturate the central core and thus lose this detail but modern cameras have a huge dynamic range and so are capable of capturing it if used with care.
>
> Please keep up the visual observations whenever you get a chance.
>
> Nick.
>
>> On 21/10/2024 21:58, Wayne Hawley wrote:
>> Hi Paul,
>> I was setting up for observing asteroids this evening and during my setup
>> took a few images of the comet..
>> This one is a typical image 0.36m F6.7 SDSSr' 20s 2x2, SX 694 CCD.
>> [image: 2023 A3 Tsuchinshan_20241021_190245_20s.jpg]
>> Regards,
>> Wayne Hawley Z09
>>> On Mon, 21 Oct 2024 at 21:50, Paul Abel - paul.abel at yahoo.co.uk (via
>>> baa-comet list)<baa-comet@simplelists.com>  wrote:
>>> Hi all,
>>>
>>> I had to make some tests at the University of Leicester Observatory this
>>> evening and decided to observe the comet since the cloud cleared in time.
>>> The Observatory houses a 508mm (20 inch) Planewave Dall-Kirkham and I used
>>> a power of x108 to observe the comet.  Attached is a drawing made with the
>>> telescope- there were a number of interesting points, namely that the
>>> overall colour of the comet appeared to be a distinctly golden-yellow.  The
>>> core of the comet was very bright and it seemed to be elongated and
>>> elliptical rather than a circular condensation.
>>>
>>> Alas I was unable to make any magnitude estimates as there were no
>>> sufficient field stars which could be used as a comparison.
>>>
>>> Best wishes,
>>> -Paul
>
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