Thanks Denis for posting notice of a very recent outburst as discovered by
yourself and Patrick Wiggins.

Turns out Patrick has imaged the comet again this morning and it is shining
almost twice as brightly as you saw it about 7 hours previous!
It has now reached almost 13.7R having been around 14.4 R when you last
imaged it.

Have updated the MISSION 29P webpage at:
https://britastro.org/node/25120
Here's what I wrote there:

LATEST: An outburst of about 2.5 mag amplitude appears to have occurred on
2021 September 25.34 +/-0.005 followed about 20 hours later by another
outburst of similar intensity

Thanks again to Patrick Wiggins (718) imaging from Utah and a good run of
clear skies, and Denis Buczynski in Scotland also favoured with clear skies
these past two nights, we have witnessed a double outburst, where one
presumably has subsequently triggered another cryo-eruption (see listing of
observations below). These two events might herald more intense activity in
the coming few years. The last 2.5 years have only witnessed 8 events
brighter than mag 14.5R, which coincides with similar relatively quiescent
behaviour seen earlier when the comet was halfway around its orbit of the
Sun, i.e. two seasons earlier. If the nucleus has a high tilt then these
quiescent times may correspond to the seasons when the poles are directed
towards the Sun (and Earth). Since the equatorial regions on the nucleus
experience the greatest amount of solar radiation, these are likely to be
more thermally processed and hence exhibit more intense cryovolcanicity.
Watch out in the coming year or two for 12th magnitude outbursts.

So this latest behaviour, with two events brighter than 14.5R in quick
succession, may indeed herald the onset of a new more active season at the
nucleus.

Observations greatly appreciated,
Richard Miles
BAA

----- Original Message -----
From: denis buczynski - buczynski8166 at btinternet.com (via baa-comet list)
To: baa-comet@simplelists.com
Sent: Sunday, September 26, 2021 11:53 AM
Subject: [BAA Comets] 29P outburst 20210925-26

Hello all, I was able to observe Comet 29p S-W last night 20210925-26 (which
was 24 hours after Richard Miles announced a small outburst of 0.7 mag
observed by Patrick Wiggins in USA) and found the comet was in bright
outburst at mag 14.5 with a compact coma. Futher observations are needed to
follow the development of this lastest outburst. Please send observations to
Richard Miles for the MISSION 29P project.
0029P C2021 09 25.99183 04 57 30.80 +31 47 02.9 14.6 G I81
0029P C2021 09 25.99605 04 57 30.81 +31 47 03.2 14.6 G I81
0029P C2021 09 25.99890 04 57 30.83 +31 47 03.4 14.6 G I81
0029P C2021 09 26.00175 04 57 30.84 +31 47 03.6 14.6 G I81
Denis Buczynski Tarbatness

To unsubscribe from this list please go to
http://www.simplelists.com/confirm.php?u=aR5jVcAm0PpxqWzIIDZTQWdURWgNdCOC