LPV

Letter to Users of 2016 Bulletin

                                                                                                                                                        February 2016

Dear Observers,

Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2016

December 1, 2015

The long period variable R Aquarii is an extremely interesting system. Its type is both Mira (M) and symbiotic (ZAND) - R Aqr is a close binary system consisting of a hot star and a late-type star, both enveloped in nebulosity. In the case of R Aqr, the late-type star is a Mira. As a result, the very interesting light curve shows not only the Mira pulsation but also eclipses as the two stars interact.

Letter to Users of 2015 Bulletin

                                                                                                                                                        February 2015

Dear Observers,

AAVSO Bulletin 78 - Predicted Dates of Maxima and Minima of Long Period Variables for 2015 - is published in the new format that was introduced in 2011. The information that was included in earlier numbers of the Bulletin is included in this new format, along with more information. The Bulletin does not include stars that do not have an AAVSO mean curve.

AAVSO Bulletin 78: Predicted Dates of Maxima and Minima of
380 Long Period Variables for 2015

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

In AAVSO Bulletin 78 there are two stars that exhibit double maxima:  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 2015 through February 2016 are presented here in list form (JD and Gregorian calendar dates) and in approximation of the main Bulletin table format.

Predicted Dates of Maxima and Minima of 380 Long Period Variables for 2015