Hi Kevin,

Thanks, although it is difficult to say since the lightcurve I am
maintaining is unfiltered (or V) against Gaia G. Could you measure your
r-band images against Gaia G and see if the zero point moves?

Nick.

On 30/12/2023 11:04, goldchip at btinternet.com (via baa-comet list) wrote:
> Nick,
>
> Last night, I conducted photometry on 12p under challenging conditions.
> Despite the poor weather, I managed to obtain results from three stacks,
> each consisting of six 30-second images, using an aperture size of 8.2 arc
> seconds. The calculated magnitude is 12.9, perhaps suggesting a potential
> outburst has commenced?
>
>
>
> Kevin.