Proposal #658

AAVSO Alert Notice 908 describes the next eclipse of the triple system b Per. The eclipse only lasts about 3 days centered on November 1, but the researcher wants monitoring from about October 19 through November 15. This will be a primary eclipse, with the third star (C), which has a 704d orbit, passing in front of the AB pair (1.5d orbit). Out of eclipse data is needed to calculate the offsets between observers, taking into account the 0.06mag ellipsoidal variation caused by the AB pair.

I would like to use AAVSOnet for monitoring this eclipse. A few nightly observations will be made before and after the eclipse, with time series during the window October 31 through November 2. Observations will be submitted. It appears this observation has been done by members of the AAVSOnet team before. I am specifically asking for B and V filters used, but totally open for other filters to be added by the team if wanted. I will be performing my own observations (TG/DSLR) during this period and it will be a chance for me to compare. This is my first AAVSOnet proposal.