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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
Join and Support
Join 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 5 , 9 7 9 , 1 3 1 and Counting ...

Last Observation Received:

17 min 27 sec ago by VSD - David Vansteelant (BE)

N CAS 2021   Jul 30.9528   8.0Vis.

Plot N CAS 2021 light curve

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