Thomas,

Thanks for your images. I believe that the outer coma shown on your deep
image is the residual coma from previous activity.

Nick.

On 24/11/2020 18:24, Thomas Lehmann wrote:
>
> Hi Nick,
>
> first of all, congrats to you and Jean-Francois for catching this early rise
> of an outburst. It's very interesting to follow this discussion - thanks to
> all contributors!
>
> I have had a chance to image 29P yesterday eavening before clouds too over
> the sky. In total I imaged for 26 minutes using my 11" RASA at 1.26" per
> pixel (2020-11-23, UT 20:45). The same data has been processed in two
> different way to enhance contrast, see attached image.
>
> At this low resolution (about 4") I cannot get much detail in the inner
> outburst coma. But I'd like to draw your attention to the huge outer coma,
> extending at least 4 arcmin away from the nucleus. Its asymmetric shape
> does follow the inner coma to some degree so it might be related
> to the current outburst and not be a leftover of some previous one.
> Is it expected to have some material ejected at a much higher velocity
> than what you derive from the size of inner coma?
> Or is the comet sitting within a longer living cloud of dust?
>
> Clear skies,
> Thomas
>