b Persei Results - December 2021 primary eclipse


 
The lower figure shows the results for the b Persei eclipse by AAVSO observers listed in the legend.  The solid curve shows the simulated curve based on the predictions of the date and the parameters of the Jan 2020 curve.  As can be seen the timing of the eclipse is basically correct, but the other parameters such as star sizes, luminosities, separation, orbital line-of-nodes direction need adjusting.  I have made some progress in multi-parameter fitting using a simplex search algorithm in the spring and summer of 2021.  I will be developing this algorithm to use a searching routine that makes evaluations on all the eclipses that we have observed to date.

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AAVSO b Persei Results for November 2023 primary eclipse   As we can see, the timing predictions of the eclipse main ingress and egress are reasonable, but the light curve of the prediction near the mid-eclipse needs some work.  Most likely the sizes and brightnesses of the B and C stars.  These data are significant in that we hope to gain a better approximation of the stellar sizes.  The predicted eclipse date was determined by extrapolating the best fit dates of mid eclipse of past eclipses into 2023. The approximate sinusoidal curves are the fits to the out-of-eclipse data from 2018-19. 
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