Skip to main content

long period variable

AAVSO Bulletin 80 for 2017

Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2017

AAVSO Bulletin 80 for 2017 - Introduction

AAVSO Bulletin 80: Predicted Dates of Maxima and Minima of
381 Long Period Variables for 2017

Elizabeth O. Waagen, Senior Technical Assistant (Science Operations)
AAVSO, 49 Bay State Road, Cambridge, MA 02138 USA

AAVSO Bulletin 80 for 2017 - Letter to Observers

Letter to Users of 2017 Bulletin

                                                                                                                                            February 2017

Dear Observers,

Khi Cygni

Khi Cygni: Overshadowing the Bride

By Dr. Kristine Larsen, Central Connecticut State University

Alert Notice 358: Monitoring of Mira (omi Cet) in support of HST Observations

September 17, 2007: Dr. Margarita Karovska (Harvard-Smithsonian Center for Astrophysics) and
collaborators are performing a comprehensive study of the Mira AB interacting system, using the WFPC2 camera on the Hubble Space Telescope. Mira AB is composed of the prototype Mira variable omi Cet and its companion VZ Cet, separated by about 0.5 arcsecond. As part of this project they plan to obtain a large number of high-angular resolution images at wavelengths ranging from UV to optical.  The main objectives of the HST/WFPC2 observations are:

AAVSO Bulletin 75 for 2012

Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2012

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.

Pages

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