Inscribirse: Reprogramado para el 18/3, "Introducción a la Astronomía, Parte 2"
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Check out changes to the Variable Star Plotter!
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Now hiring: software developer
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Rarity in Space Provides Insights to Evolution
AAVSO's Staff Astronomer plays key role
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Renew your AAVSO membership to keep the perks!
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Discover the AAVSO
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La Ciencia del Cielo para Principiantes
Seminarios web de astronomia gratis en espanol
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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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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 7 , 1 7 3 , 3 9 9 and Counting ...

Last Observation Received:

1 hour 16 min ago by DALD - Athol Davis (US)

X LEO   Mar 21.1571   15.029I

Plot X LEO light curve

Solar Bulletin - Volume 79, Number 2
Mar 17
Alert Notice 818: SSS 100511:061754-362655 observations scheduled with HST
Mar 15
Alert Notice 817: Coverage needed of MU Cam in current low state
Mar 15
Alert Notice 816: KR Aur observations needed tonight for HST check
Mar 9
Alert Notice 815: T Pyx monitoring requested for upcoming HST observations
Feb 28
News Archives

Our Stellar Partners


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