In Bulletin 74 there are three stars that exhibit double maxima: V Boo, R Cen, and R Nor. These stars therefore have primary and secondary maxima and minima. They are not included in the main Bulletin table. Their predicted dates of maximum and minimum for January 2011 through February 2012 are presented here in list form (JD and Gregorian calendar dates) and in approximation of the main Bulletin table format.
The following form will allow you to generate a customized copy of the AAVSO Bulletin suited to your needs. You may select stars from a given constellation, range of Right Ascension and/or Declination, or simply type in a list of stars you would like returned. You may also customize the page that's output by color-coding the months depending upon the brightness of the star, and also limit output to a single month. Leaving all options blank will give you the complete list of stars in this issue of the Bulletin with no color added to the table.
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Note: A separate page exists for the data including unpublished times of maxima.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).
The AAVSO Bulletin: Predicted Dates of Maxima and Minima of Long Period Variables is a long-running publication of the AAVSO. It gives predictions of dates of maxima and minima for hundreds of long period variables (Miras and semiregulars) in the AAVSO program, and is intended to be an observing guide and planning tool for all observers of LPV stars, amateur and professional alike.
The currently published Bulletin for January 2018 through February 2019 is Bulletin 81.
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.
