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AAVSO Extended File Format

Version: 1.2
Release Date: July 27, 2011 (latest update: June 13, 2017)

This is one of two plain text (ASCII) formats that the AAVSO accepts for uploading a file of variable star observations. Please use the WebObs File Upload page to upload your file in the AAVSO Extended Format. The other format, which is intended for visual observers, is called the AAVSO Visual File Format.

AAVSO Visual File Format

Version: 1.0
Release Date: January 15, 2008

This is one of two plain text (ASCII) formats that the AAVSO accepts for variable star observations. Observations in this format may be submitted using the WebObs File Upload Tool. The other format is intended for CCD, DSLR, PEP, and VISDIG (visual observations made from digital images) observers and is called the AAVSO Extended File Format.

Obtaining your PEP epsilon(V) coefficient

Making Observations for Obtaining Epsilon-V Coefficient Using the Two-Star Method


Assuming you have a suitable photoelectric photometry system (telescope and photometer), you will also need the following:

CCD Views

Note: CCD Views is no longer being published. Articles related to CCD observing may be found in the AAVSO Newsletter

This page is currently being created from archives of the old AAVSO website.  It will be completed as staff time permits. (2011 June 30)

Visual Observing Manual - Turkish

Uyari/Cekince: Degisken Yildizlarin Gozlem El Kilavuzu'nun Ingilizce baskisinin metni yenilenmis olup, diger dillere tercumesi henuz yapilmamistir. Bu kilavuzun bazi bolumleri artik guncel degildir. Soz konusu bolumler zaman icerisinde yenilenecektir.

Visual Observing Manual - Italian

AVVISO: E' disponibile una versione più recente in lingua inglese del Manuale per l'Osservazione Visuale delle Stelle Variabili ma la versione italiana non è ancora stata aggiornata. Alcune parti della presente traduzione sono quindi obsolete e contiamo di sostituirle nel prossimo futuro.


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