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observing aid

The AAVSO Circulars – See what’s been happening in the night sky as you plan your observing program!

The AAVSO has numerous observing aids designed to help you make the most efficient use of your valuable observing time. Each Observing Section and each mode of observing has a variety of resources – be sure to visit these pages and explore the links. The best place to start is the "Observing at a Glance – for Observers" page (

AAVSO Bulletin 81 for 2018 - Introduction

AAVSO Bulletin 81: Predicted Dates of Maxima and Minima of
381 Long Period Variables for 2018

AAVSO Target Tool

One of the most commonly asked questions by AAVSO observers is "What should I observe tonight?" With the easy-to-use AAVSO Target Tool, we hope that you will find the answer!

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,

AAVSO Bulletin 79 for 2016 - How to Use the Bulletin

AAVSO Bulletin 79 - Predicted Dates of Maxima and Minima of Long Period Variables for 2016 - is published in the format that was introduced in 2011. The information that was included in earlier numbers of the Bulletin is included in this format, along with more information. The Bulletin does not include stars that do not have an AAVSO mean curve. Please read all of the materials provided to familiarize yourself with the customizable format of the Bulletin and all the ways you can use it in your variable star observing and research.


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