AAVSO Alert Notice 761 announces an observing campaign on the triple-component eclipsing system b Per, which has an eclipse in December 2021. Please see the notice for details and observing instructions.
There are threads for this campaign under the following forums:
Please subscribe to these threads if you are participating in the campaign so you can be updated. Join in the discussion or ask questions there!
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ