Nick

Thank you - I managed to image 29P through high cloud as well and it is
looking very Pac-Man like.

Astrometry.Net tells me my image scale last night was 0.225 arc secs per
pixel.  On that basis am I right in assuming for 9 arc secs I'd need to set
the aperture value in Astrometrica to 40 pixels?

At the moment I'm restricted to unguided tracking until I can find the right
spacers to get the camera parfocal with my off-axis guide camera.    The
clear patches last night didn't last long enough to find the right
combination.

Peter

-----Original Message-----
From: baa-comet@simplelists.com [mailto:baa-comet@simplelists.com] On Behalf
Of Nick James
Sent: 11 November 2024 07:37
To: baa-comet@simplelists.com
Subject: Re: [BAA Comets] C/2023 A3 in a brief clear spell tonight

Peter,

Thanks. The 2600MM is a good camera for comet work. I'm sure you'll
enjoy using it. C/2023 A3 is still an impressive object but fading quite
quickly now. I'd like to restart the programme to monitor it in a 9
arcsec aperture as it moves outwards.

I imaged 29P this morning although there was still a lot of high cloud
around here. It was very close to a bright star but the asymmetric,
expanding coma was obvious.

Nick.

On 11/11/2024 00:20, Peter Tickner - peter.tickner1472 at btinternet.com
(via baa-comet list) wrote:
> https://flic.kr/p/2qtojRU
>
>
>
> This is a link to my mono images taken this evening.  Finally invested in
an
> APS-C format mono camera for comet work.  I just need to adjust my
> Astrometrica settings and should be able to measure it from the individual
> images.  If it clears in the early hours for 29P I hope to take that on as
> well although some technical problems to overcome first before I can use
my
> spare autoguider with it.

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