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The mission of the AAVSO is to enable anyone, anywhere to participate in scientific discovery through variable star astronomy. 


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(VSX) Variable Star Index

Pick a Star

Plot a light curve
The Journal of the AAVSO
Submit and Access Data
Tools and Observer Resources
Observing Sections
Observing Sections
CHOICE Courses, Manuals, Videos
AAVSO In the Press
AAVSO In the Press
Membership and Support
Membership and Support

The AAVSO is an equal opportunity and discrimination / harassment free environment. 
Please read our policies HERE

AAVSO at a Glance

Variable Star Observations in Database:

6 3 , 6 0 0 , 6 0 9 and Counting ...

Last Observation Received:

21 min 39 sec ago by MJOD - Jose Luis Martin (ES)

QSO B1420+326   Jul 21.9125   15.718V

Plot QSO B1420+326 light curve

Our Stellar Partners

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