After nine months of ups and downs, V1405 Cas has finally broken through the mag 10 barrier – last night (Dec 19) 10.47TG. That’s a 0.7 mag drop in 24h.
Munari and Valisa report in a recent ATel that this is a rare neon nova with an overabundance of neon in the ejecta, derived from the white dwarf: https://www.astronomerstelegram.org/?read=15796
This nova, which erupted in March 2021, is still above mag 12.