Hi Peter,

excellent image (as usual from you) of this nice object!
To me it looks like there is a tail developing in between the two horns closer
to the eastbound horn and approximately in anti-solar direction. This would then
likely have another origin than the outburst. Let's see how it develops over the
next days/weeks.

Unfortunately weather has not permitted to do any observing for the last 2-3
weeks here ...

Cheers,
Thomas

> Am Mon, 6 Nov 2023 22:12:43 +0000
> schrieb Peter Carson <petercarson100@gmail.com>:
>
> Hi Nick,
>
> Here’s my image of 12P taken 80 minutes after yours and at a resolution of 0.61 arcsecs per pixel. I confirm there’s some interesting stuff going on to the east of the photocentre.
>
> Comphot on my images gives mag 10.4 in a coma 6.6 arc mins dia. I’m seeing more of the outer coma than you.
>
>  
>
> Peter
>
>  
>
> Sent from Mail for Windows
>
>  
>
> From: Nick James
> Sent: 06 November 2023 20:25
> To: baa-comet@simplelists.com
> Subject: Re: [BAA Comets] 12P in outburst again
>
>  
>
> Around six days since 12P had a double outburst the inner coma diameter
>
> is around 2 arcmin. The attached image was taken earlier this evening.
>
> The comet shows interesting structure in the coma with rays either side
>
> of a darker region and a bright lump of material lto the east of the
>
> photocentre. Note also that the expanding coma is not exactly circular.
>
> I have not seen this before and I assume it is the effect of solar
>
> radiation pressure on the dust cloud but I need to check the geometry.
>
>  
>
> I get a total magnitude of 10.9 including some of the faint outer coma.
>
>  
>
> Pleaes keep an eye on this comet whenever you get a chance.
>
>  
>
> Nick.
>
>  
>
> PS - Richard sent some images obtained using larger telescopes a few
>
> days ago but these got stuck since the exceeded the maximum file size
>
> limits. I have just released them.
>
>  
>
> On 31/10/2023 19:15, Nick James wrote:
>
> > Denis Buczynski, Tarbatness, reports that 12P is in outburst again. He
>
> > gets a g magnitude of 12.9 from an image taken at Oct 31.76. Francois
>
> > Kugel also reports the outburst at Oct 31.74.
>
> >
>
> > Richard Miles reports that the Comet Chasers group have a measurement of
>
> > 15.87G at Oct 31.19.
>
> >
>
> > If you have any observations between these two times please report them
>
> > to the section.
>
> >
>
> > Nick James. Director.
>
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