Visual Observing Manual - Spanish
Manual Completo - Edición Revisada 2013
Manual para la Observación Visual de Estrellas Variables (5.5 MB)
observing aids
any content that aids in observing practices
AAVSO Bulletin 81 for 2018
Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2018
Julian Date (JD) Calculator and Calendars
What is Julian Date?
Compute the JD or UT yourself
To convert from JD to calendar date enter the Julian Date below:
How to report new variable star discoveries
What do I do when I discover a new variable star?
(Jump to Reporting Possible Nova Discoveries)
AAVSO Bulletin 80 for 2017
Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2017
Visual Observing Manual - German
Complete Manual - 2013 edition
Handbuch zur Beobachtung von veränderlichen Sternen (6.1 MB)
AAVSO Bulletin 79 for 2016
Predicted Dates of Maxima and Minima of 381 Long Period Variables for 2016
The AAVSO DSLR Observing Manual in Greek
A Greek translation of The AAVSO DSLR Observing Manual is now available for download.
Many thanks to Mr. Stelios Kleidis for his tremendous volunteer effort in creating this excellent translation.