The bright (currently V~7.5) symbiotic variable CH Cyg is undergoing a fading episode.
AAVSO Alert Notice 639 requests coverage of CH Cyg during and after its current fading. Please see the notice for details and observing instructions.
There is a second thread on this event located in the Cataclysmic Variables forum (although CH Cyg is not a CV) at https://www.aavso.org/ch-cygni-precipitous-fading
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ