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semiregular

AAVSO Bulletin 77 for 2014 - Introduction

AAVSO Bulletin 77: Predicted Dates of Maxima and Minima of
381 Long Period Variables for 2014

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

AAVSO Bulletin 77 - Stars with Double Maxima

In AAVSO Bulletin 77 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 2014 through February 2015 are presented here in list form (JD and Gregorian calendar dates) and in approximation of the main Bulletin table format.

Alert Notice 301: Observations requested for 1041-59 eta Car and 2349+56 rho Cas

THE AMERICAN ASSOCIATION OF VARIABLE STAR OBSERVERS
25 Birch Street, Cambridge, MA 02138 USA
INTERNET: aavso@aavso.org
Tel. 617-354-0484 Fax 617-354-0665

AAVSO ALERT NOTICE 301 (May 21, 2003)

SUBJECTS: 1041-59 ETA CAR; 2349+56 RHO CAS

OBSERVATIONS REQUESTED: 1041-59 ETA CAR and 2349+56 RHO CAS

EVENTS: Possible optical brightening of eta Car over next few months; Possible optical fading of rho Cas over next few months

Bulletin 76 for 2013 published and available online

AAVSO Bulletin 76 - Predicted Dates of Maxima and Minima of Long Period Variables for 2013 - has been published and is available from the AAVSO Bulletin page.

AAVSO Bulletin 76 gives predicted dates for 381 Mira and semiregular variables for the period January 2013 through February 2014. These dates are based on observations in the AAVSO International Database.

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

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.

Pages

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