This is the AAVSO Data Download form, where you can access and download data from the AAVSO International Database, which has over 18 million visual, PEP, and CCD observations of variable stars dating back to its founding over 90 years ago. Over 6 thousand observers from all over the world have contributed data for over 6 thousand objects. This is the largest and highest quality digital database of variable star observations available. All our data go through a strict quality control analysis (validation), a procedure that insures the data are as error free as possible.By entering the specifics of the search you wish to perform in the form to the right, you can download data from the AAVSO International Database in a variety of formats.Guidance in the use of this form is available on the form by clicking any of the question mark icons found next to each input field. If you need further assistance, send us an E-mail at: aavso@aavso.org

WHAT IS THE AUID, NAME, OR DESIGNATION OF THE OBJECT?

WHAT DATE RANGE WOULD YOU LIKE TO USE?
Enter Julian date or Gregorian Date (MM/DD/YYYY)

START DATE

END DATE

HOW SHALL WE CONTACT YOU?

FIRST NAME

LAST NAME

EMAIL

COUNTRY

AFFILIATION

WHICH OF THESE BEST DESCRIBES YOU?

Select one...Professional AstronomerAmateur AstronomerEducatorStudentOther

HOW DO PLAN ON USING THIS DATA?

Select one...Data AnalysisSchedule Observing RunFigure for paper or presentationEducation & OutreachOther

DO YOU WANT DISCREPANT DATA INCLUDED?

Yes

No

DO YOU WANT DIFF AND STEP DATA INCLUDED?

Yes

No

IN WHAT FORMAT SHOULD THE DATA BE RETURNED?

Comma-delimited

Tab-delimited

Space-delimited

ANY ADDITIONAL COMMENT AND/OR QUESTIONS?

Submit