The Thomas R. and Anna Fay Williams AAVSO Archives
These data are formally published for the years 1900 to 2008. For a description of this data set, please click here.
Note: A separate page exists for the data including unpublished times of maxima. Go here for the current data set including the most recent data (through February of the current year).
Stars with maxima and minima data are as follows:
Long-term observations of long period variable stars are essential to the determination of period, change in period, change in behavior resulting from mass loss and/or evolution, mode of pulsation (fundamental or overtone), internal structure, and phase at specific times for these stars.