Thank you for your support!
Your generous donations helped us reach—and exceed—our Annual Campaign goal.
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https://www.aavso.org/donate-now?utm_source=slider&utm_medium=web&utm_campaign=ac25
Deciphering Eclipsing Binary Systems
Join Dr. Pierre Maxted for a presentation on ESA’s PLATO mission to study terrestrial exoplanets.
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https://us02web.zoom.us/webinar/register/8817374773923/WN__1iX3a3URi-ry9MneK7lfw
RW Cephei, King of Kings
The physical processes behind a hypergiant’s “great dimming” may have been unlocked by high-resolution imagery and a century’s worth of AAVSO observations
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https://www.aavso.org/blog/rw-cephei
Discover the AAVSO
An international community
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Welcome to the conversation.
We are excited to announce a transition to a new forum system. The new system is modern, faster, and easier-to-use.
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https://forums.aavso.org/

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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
/index.php/apps/jaavso
Data
Submit and Access Data
/index.php/databases
Telescope
Tools and Observer Resources
/index.php/observers
Observing Sections
Observing Sections
/index.php/observing-sections
Education
Education
CHOICE Courses, Manuals, Videos
/index.php/education
AAVSO In the Press
AAVSO In the Press
/index.php/press
Membership and Support
Membership and Support
/index.php/join-aavso

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

Last Observation Received:

8 min 15 sec ago by HMB - Franz-Josef (Josch) Hambsch (BE)

GAIA DR3 5959638075314688128   May 19.2669   17.007V

Plot GAIA DR3 5959638075314688128 light curve

Director's Report for 2024-Q4
Feb 13
The Tesla Roadster—Not an Asteroid
Feb 8
Solar Section Looks Back to the Future
Dec 23
Winter 2024 Visual Observing Challenge
Dec 19
JAAVSO Volume 52 Number 2, 2024 is published
Dec 15
News Archives

Our Stellar Partners


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