Learn which stars to observe based on your location, equipment, & more!
Register for the online course here!
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Want to present? Submit an abstract!
Submission deadline: Sept. 4
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Please note: there will be no session July 2
Happy Independence Day weekend to those in the USA!
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Discover the AAVSO
an international community
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AAVSO is accepting self-nominations for 2022 AAVSO Board candidacy!
Nomination period ends July 15th
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Interested? Please click here!
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stands in solidarity
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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
/vsx

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
/observers
Observing Sections
Observing Sections
/observing-sections
Education
Education
CHOICE Courses, Manuals, Videos
/education
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 3 , 1 8 9 , 4 9 3 and Counting ...

Last Observation Received:

1 min 16 sec ago by BBRE - Brook Belay (US)

z uma   Jun 14.0985   7.5Vis.

Plot z uma light curve

JAAVSO Volume 50, Number 1, June 2022, print version now available
Jun 28
Solar Bulletin - Volume 78, Number 5
Jun 17
JAAVSO Volume 50 Number 1, 2022 is published
Jun 15
Alert Notice 781: Nova in Musca - N Mus 2022 (= ASASSN-22hw = AT 2022mmp)
Jun 14
Alert Notice 780: Observations needed for four YSO targets being observed with HST
Jun 14
News Archives

Our Stellar Partners


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