The R Coronae Borealis-type star NSV 11664 in Aquila seems to be dimming rapidly. From a magnitude of around 14.3 TG a month ago it is now down to below 16.1 TG. There are only 60 total observations of it in the AAVSO database and only a handful of those from when it is in a minimum so I think more observations of it in the near future would be useful. I will continue watching it but it’s pushing the limits of my equipment and very soon will probably be too dim for me to meaningfully estimate.
Brian (SBQ)