Thomas/Denis,

Yes, this looks to be a new outburst. An updated lightcurve including
Denis' photometry is here:

https://nickdjames.com/Comets/2024/12P_lightcurve_9arcsec.png

The last pre-outburst photometry in the BAA database is this observation
from Martin Mobberley using iTelescope T21.

2460343.59868   11.920 G  C  163.20   26.921    Gaia2   12P/Pons-Brooks
2460343.60289   11.901 G  C  200.30   27.129    Gaia2   12P/Pons-Brooks
2460343.60539   11.890 G  C  220.07   26.967    Gaia2   12P/Pons-Brooks

Nick.

On 03/02/2024 21:16, denis buczynski - buczynski8166 at btinternet.com
(via baa-comet list) wrote:
> Hi Gerald,
>
> I have just finished imaging 12p as part of the BAA Comet Section
> monitiring programme on this comet. I can confirm that the comet has
> brightened to around 11.2 using 9 arc sec aperture C14
> unfiltered.Previous observationshad the coemt at 11.9.
>
>
> OBSERVER: D. Buczynski
> OBS CODE: 179
> TELESCOPE: 0.43m f/6.9 CDK
> EXPOSURE JD: Mid-exposure, not corrected for light time
> ---------------------------------------------------------------
> JD mag Flt SNR ZeroPt Cat Design.
> ---------------------------------------------------------------
> 2460344.28429 11.245 G C 306.59 24.772 Gaia2 12P/Pons-Brooks
> 2460344.28500 11.249 G C 268.41 24.386 Gaia2 12P/Pons-Brooks
> 2460344.28571 11.243 G C 270.71 24.828 Gaia2 12P/Pons-Brooks
> 2460344.28642 11.215 G C 341.04 25.580 Gaia2 12P/Pons-Brooks
> 2460344.28784 11.234 G C 254.30 24.096 Gaia2 12P/Pons-Brooks
> 2460344.28855 11.221 G C 307.33 25.796 Gaia2 12P/Pons-Brooks
>
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