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According to observations by S. Fritsche and myself the comet C/2023 Q1 has
started a sudden brightening in November. Unfortunately our observations
are very sparse due to the bad weather during the last two months.
Our data suggest a brightening by 1-2 mag between October 26th and November
30th.

Latest measurement (green channel): 2024-12-23.46 UT, m1=14.1, coma diam. 5'

A more thorough investigation by using small aperture measurements is on the
way.


Thanks to all contributors for sharing results and ideas/thoughts to this list.
Merry Christmas and best wishes to all of you,
Thomas