AAVSO Observations Help Confirm Betelgeuse's Long-Suspected Companion
After more than a century of searching, astronomers have confirmed Betelgeuse's elusive companion star, and AAVSO observations played a critical role in the discovery. Learn how years of dedicated monitoring helped solve one of astronomy's longest-standing mysteries.
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A New AAVSO Website
Coming Soon
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115th Annual Meeting Registration is Now Open
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Building for the Future: AAVSO Expands Staff and Scientific Capacity
Building on recent growth in observers, scientific output, and community engagement, the AAVSO is making strategic investments to strengthen its future and expand opportunities for participation in astronomy.
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AAVSO at a Glance

Variable Star Observations in Database:

8 5 , 4 8 0 , 2 3 4 and Counting ...

Last Observation Received:

31 min 18 sec ago by BORA - Orlando Benítez Sánchez (ES)

Gaia DR3 2061246172212227712   Jul 29.9336   10.823V

Plot Gaia DR3 2061246172212227712 light curve

A New AAVSO Website is Coming
Aug 3
AAVSO Observations Help Confirm Betelgeuse's Long-Suspected Companion
Jul 28
JAAVSO Volume 54, Number 1, June 2026, print version now available
Jul 9
Director’s Report - 2026-Q1/Q2
Jul 8
JAAVSO Volume 54, Number 1, 2026 is published
Jun 15
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