Morning everyone,

Up until yesterday the central region (11 arcsec radius) of C/2019 Y4
has been brightening at around 0.05 mag per day but last night it had
jumped by a whole magnitude compared to the night before (May 7.9 vs May
8.9). The attached plot is from my astrometry with a 0.28-m, f/10 SCT in
Chelmsford.

Terry Lovejoy, via the CometWatch FB group, reports a similar sudden
increase between May 8.12 and May 9.12 using the iTelescope T11 system
in New Mexico.

With all the excitement over C/2020 F8 (SWAN) please remember to keep
observing Y4 for as long as you can.

Nick.