Possible there are some observers, who are interested to contribute to a new long-term monitoring campaign of rho Cas. Attached is the Halpha RV and EW monitoring of the past combined with the newest state.
AAVSO Alert Notice 746 announces an observing campaign (spectroscopy, photometry, visual observations) on the yellow hypergiant rho Cas. 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 by the astronomer and by HQ. Join in the discussion or ask questions there!
Many thanks, and Good observing,
Elizabeth O. Waagen, AAVSO HQ
the first and primary aim of the campaign should be, to catch any possible ejections events as quick as possible and to document.
If we are successful in certain cases I suggest to take quick contact with the professional astronomy (A. Lobel et al., A. Aret et al., V. Klochkova et al.), they do have the corresponding analytical experience to suggest, what additional wavelenght regions should be monitored.