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AAVSO Bulletin 76 - Stars with Double Maxima

In AAVSO Bulletin 76 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 2013 through February 2014 are presented here in list form (JD and Gregorian calendar dates) and in approximation of the main Bulletin table format.

AAVSO Bulletin 76 for 2013 - Letter to Observers

Letter to Users of 2013 Bulletin

                                                                                                                                                             February 2013

Dear Observers,

AAVSO Bulletin 76 for 2013 - Introduction

AAVSO Bulletin 76: Predicted Dates of Maxima and Minima of
381 Long Period Variables for 2013

Elizabeth O. Waagen, Senior Technical Assistant
Matthew R. Templeton, Ph.D, Science Director
AAVSO, 49 Bay State Road, Cambridge, MA 02138 USA

Mira Variables with Period Changes

Mira variables are the longest-observed class of stars for which we have long-term quantitative data that allow us to study their behavior over centuries-long periods of time.  Fortunately for us, they're also easy to observe and monitor, having some of the largest amplitudes of all variables, and hundreds of them are bright enough that they're within reach of astronomers with modest telescopes.

AAVSO Bulletin Generator

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.

AAVSO Bulletin 74 for 2011

Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2011

AAVSO Maxima and Minima of Long Period Variables, 1900-2008

Elizabeth O. Waagen, Janet A. Mattei, and Matthew R. Templeton

Click here for data access

Introduction

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.

ejaavso252.115

eJAAVSO  

 

History of the Discovery of Mira Stars

pdf

Dorrit Hoffleit

Department of Astronomy

Yale University

Mira Revisited

Prepared by Kerri Malatesta, AAVSO Technical Assistant - Winter 2006

Pages

AAVSO 49 Bay State Rd. Cambridge, MA 02138 aavso@aavso.org 617-354-0484