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AAVSO File Format Specifications

This Official AAVSO file report format was released on January 15, 2008.

Files of observations uploaded to the AAVSO via the WebObs File Upload tool must be formatted in the Official AAVSO Format. Visit our page on Software that exports to AAVSO format to help format your observations.

AAVSO Visual File Format

Version: 1.0
Release Date: January 15, 2008

This is one of two 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.

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