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

Resources

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(VSX) Variable Star Index

Pick a Star

Plot a light curve
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The Journal of the AAVSO
Data
Submit and Access Data
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Tools and Observer Resources
Observing Sections
Observing Sections
Education
Education
CHOICE Courses, Manuals, Videos
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:

4 6 , 7 2 1 , 0 3 6 and Counting ...

Last Observation Received:

2 min 48 sec ago by LGIB - Gianpiero Locatelli (IT)

S2 0109+224   Oct 15.8699   15.166V

Plot S2 0109+224 light curve

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