any content that aids in observing practices
AAVSO Bulletin 78 for 2015
Predicted Dates of Maxima and Minima of 380 Long Period Variables for 2015
Program stars in need of observation
The AAVSO maintains several lists of stars for which observations are strongly encouraged. These are primarily stars for which the AAVSO already has well-covered light curves spanning several decades or longer, and for which we deem there is value in continuing observations indefinitely.
Visually observed stars known to be constant or not measurably variable
The following is a list of stars present in the VSX catalog as of 2013 March 7 that are known or suspected of being constant and have been visually observed in the past. You should not observe these stars anymore; if they are a part of your visual observing program, please remove them immediately.
The list is divided into three parts: named variables first, followed by NSV stars, and then a small number of GSC stars. In the case of the GSC stars, these are primarily previously used comparison stars suspected of being variable at some time in the past.
New Chinese Visual Observing Manual
I am very pleased to announce that we now have TWO Chinese translations of the AAVSO Manual for Visual Observing of Variable Stars available for downloading. The newest addition to our collection of Manual translations is in "Traditional Chinese" which is used in Hong Kong, Macau, Taiwan and parts of southeast Asia. This beautiful translation was done by Tao Fan-Lin (陶蕃麟) who is the Director of the Taipei Association of Astronomy Now.
You can get both versions of the Chinese Manual here:
2013 JD Calendar
The 2013 JD Calendar is now available.
Go to the JD Calendar page and scroll down to the bottom where you will be able to view or download the new calendar.
Bob Nelson's O-C files for EBs 2012 edition
The AAVSO is happy to provide a copy of Bob Nelson's O-C files for Eclipsing Binaries for 2012. These files can be used for observation planning, and are a valuable resource for EB observers.
Thanks once again for Bob Nelson for providing this service to the EB community.
AAVSO Bulletin 75 for 2012
Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2012
Visual Observing Manual in Persian
The Manual for Visual Observing of Variable Stars is now available in Persian (Farsi).
This translation would not have been possible without the hard work and dedication of volunteers Fatemeh Bahrani and her colleagues, Ali Honarmand, Fateme Kayanikhoo, Mozhde Mohamadi, Sajad Safari, and Arezoo Saleki of the Dr. Hesabi Institute in Shiraz, Iran (http://www.dr-hesabi.org).
Visual Observing Manual - Persian
(4.5 MB) راهنمای رصد بصری ستارگان متغیر
(257 KB) مقدمه
(1.1 MB) فصل 1 – آماده سازی