I managed to image this comet this morning using a widefield system in
Chile (iTelescope T70, 135mm, f/2 Samyang lens + ASI2600MM). I got a
magnitude of 3.5 using comphot but the image was saturated so this is
probably an underestimate. The comet shows a really nice dust tail and a
typical "shadow" of the nucleus which isn't a shadow but a darker region
behind the photocentre along the tail. I last saw this with C/2020 F3
(NEOWISE) when it was at its best.

The comet is, theoretically, visible from the southern UK now, very low
in the morning twilight but it would take amazingly clear skies and good
fortune to get it.

I'm confident now that it will be a very nice object post-conjunction
from October 11 onwards. We just need to hope for good weather at the
critical time!

https://britastro.org/observations/observation.php?id=20240925_175723_3850a58ccb50e8f9

https://britastro.org/observations/observation.php?id=20240925_113401_8bbf723b76b8bec8

Nick.

On 17/09/2024 21:13, Nick James wrote:
> C/2023 A3 is now being observed in the morning sky from the southern
> hemisphere and it looks very healthy. I've put together some notes on
> the predicted magnitude and observabilty here:
>
> https://britastro.org/section_news_item/comet-c-2023-a3-tsuchinshan-atlas-looking-good-for-october
>
>
> There is every chance that this could be a really good comet in the
> evening sky from October 11 onwards but please remember that this is a
> comet and so it may not perform as well as we expect, or at all.
>
> Any flights to locations with better weather, darker skies and nearer to
> the equator are booked at your own risk...
>
> Nick.
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