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See our Annual Meeting Schedule!
Register today!
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October's featured variable star episode: Mira (Omicron Ceti)
Finder charts | Tips for the beginner
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Attention AAVSO members: cast your vote for board members!
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/2021-board-candidates
Welcome to the AAVSO!
New explorers are welcome.
YOU can be an astronomer.
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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
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Pick a Star

Plot a light curve
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The Journal of the AAVSO
/apps/jaavso
Data
Submit and Access Data
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Telescope
Tools and Observer Resources
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Observing Sections
Observing Sections
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Education
Education
CHOICE Courses, Manuals, Videos
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Shop
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Membership and Support
Membership and Support
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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 6 2 , 6 5 7 and Counting ...

Last Observation Received:

7 min 38 sec ago by FFAD - Fabio Feijo (BR)

1SWASP J022916.91-395901.4   Oct 20.0347   12.8Vis.

Plot 1SWASP J022916.91-395901.4 light curve

Press
Oct 15
Alert Notice 756: GM Aur being observed by HST and TESS
Oct 14
Alert Notice 755: Exoplanet transit observation requested for HD 80606
Sep 22
Solar Bulletin - Volume 77, Number 08
Sep 17
Alert Notice 754: Monitoring requested for 15 VY Scl cataclysmic variables in support of HST observations
Sep 14
News Archives

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