Within the past 24 hours or so, the peculiar Centaur object
29P/Schwassmann-Wachmann 1 has undergone its second most intense outburst
for more than 12 years.
We know this thanks to imaging by Patrick Wiggins from Utah (Obs Code 718).
Here are my measurements of his very recent images:

COD 718
OBS P. Wiggins
MEA R. Miles
COM Photometric measuring aperture 5.5 arcsec radius
TEL 0.35-m f/5.4 Schmidt-Cassegrain + CCD
ACK MPCReport file updated 2022.11.22 17:38:47
NET UCAC-4
0029P         C2022 11 21.33732 06 55 51.73 +29 16 21.0          15.70R
718 5.11" (5.48")
0029P         C2022 11 21.33815 06 55 51.72 +29 16 21.0          15.71R
718
0029P         C2022 11 21.33899 06 55 51.71 +29 16 21.0          15.70R
718
0029P         C2022 11 21.33982 06 55 51.69 +29 16 21.0          15.66R
718
0029P         C2022 11 21.34065 06 55 51.68 +29 16 21.0          15.69R
718
0029P         C2022 11 21.34148 06 55 51.66 +29 16 21.0          15.67R
718
0029P         C2022 11 21.34232 06 55 51.64 +29 16 21.1          15.64R
718
0029P         C2022 11 21.34315 06 55 51.64 +29 16 21.1          15.72R
718
0029P         C2022 11 21.34399 06 55 51.62 +29 16 21.1          15.67R
718
0029P         C2022 11 21.34482 06 55 51.60 +29 16 21.2          15.69R
718

** Outburst at 2022 11 21.83 +/-0.40  15.70R => 11.95R

0029P         C2022 11 22.32544 06 55 34.15 +29 16 54.6          11.95R
718
0029P         C2022 11 22.32627 06 55 34.12 +29 16 54.5          11.95R
718
0029P         C2022 11 22.32711 06 55 34.10 +29 16 54.5          11.95R
718
0029P         C2022 11 22.32794 06 55 34.11 +29 16 54.3          11.96R
718
0029P         C2022 11 22.32877 06 55 34.09 +29 16 54.5          11.94R
718
0029P         C2022 11 22.32961 06 55 34.07 +29 16 54.4          11.94R
718
0029P         C2022 11 22.33044 06 55 34.03 +29 16 54.8          11.95R
718
0029P         C2022 11 22.33127 06 55 34.04 +29 16 54.6          11.94R
718
0029P         C2022 11 22.33211 06 55 34.02 +29 16 54.8          11.96R
718
0029P         C2022 11 22.33294 06 55 33.99 +29 16 54.7          11.96R
718
----- end -----

Expressed in terms of the intensity of reflected light from the new outburst
coma, the change in brightness is equivalent to about 160
nucleus-equivalents.
By comparison, the intensity of the event of 2010 February 02 was some 200
nucleus-equivalents.
N.B. The unprecedented outbursts of 2021 September 26-27 equated to 350
nucleus-equivalents of new ejecta reflecting sunlight.
Other than these three dramatic events, the next brightest outburst since
2010 February has equated to 90 nucleus-equivalents.

Clearly the present cryo-eruption deserves follow-up.
More observations are to be encouraged.

N.B. If anyone has images of 29P between 2022 November 21.35 and 22.32 then
please do get in touch.

Additional information will be posted shortly to the MISSION 29P webpage at:
https://britastro.org/section_information_/comet-section-overview/mission-29
p-centaur-comet-observing-campaign

Richard Miles
Comet Section
British Astronomical Association