Book your room at the group rate before Tuesday!
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Python! Finding Frequency Solutions for Variable Star Light Curves
Register for this Saturday's webinar!
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New Executive Director
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Discover the AAVSO
an international community
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Observe Delta Cephei in September!
360-degree video | Tips for beginners
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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
/databases
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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AAVSO In Press
AAVSO In Press
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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:

5 4 , 3 4 2 , 5 0 6 and Counting ...

Last Observation Received:

3 min 42 sec ago by MDJ - Daniel Mendicini (AR)

FH SCT   Sep 23.0437   11.386Vis.

Plot FH SCT light curve

Alert Notice 793: Nova in Mensa: N Men 2022 (= ATLAS22beux = AT 2022ufh)
Sep 30
111th Annual Meeting - Hotel Group Rate Ends Tuesday, October 4th
Sep 30
History of AAVSOnet
Sep 28
Alert Notice 792: R Aqr photometry and spectroscopy requested in support of Chandra observations
Sep 21
Solar Bulletin - Volume 78, Number 8
Sep 16
News Archives

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