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Annual Meeting: Registration Closed

Join keynote speakers Brad Schaefer and Sukanya Chakrabarti (UAH), plus two days of talks online!

https://www.aavso.org/113

AAVSO Board Election: Voting & Candidates

Voting in this election is open only to members in good standing.

https://www.aavso.org/2024-board-candidates

Webinar | Things I Thought I’d Never See

Presenter: Bob King | Saturday, December 7 at 2p.m. ET | Pre-Registration Required.

https://us02web.zoom.us/webinar/register/9217299562829/WN_U_yVT5RKQXWCTAovTByNTA

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Discover the AAVSO

An international community

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.

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

(VSX) Variable Star Index

jaavso

The Journal of the AAVSO

Data

Submit and Access Data

Telescope

Tools and Observer Resources

Observing Sections

Observing Sections

/observing-sections

Education

Education

CHOICE Courses, Manuals, Videos

AAVSO In the Press

AAVSO In the Press

Membership and Support

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 5 , 1 2 3 , 1 6 8 and Counting ...

Last Observation Received:

19 min ago by TRE - Ray Tomlin (US)

ASASSN-V J195557.69+463121.4 Oct 24.1727 10.344I

Plot ASASSN-V J195557.69+463121.4 light curve

Director's Report - 2024-Q3

Oct 23

Clinton B. Ford Observatory Destroyed by Fire

Oct 7

What to Do During the Eruption of T CrB

Sep 17

2024 Proposed Bylaw Revisions

Sep 13

Alert Notice - Observing Campaign #872: Nova in Sco: N Sco 2024 No. 3 = V1725 Sco (TCP J17064645-3528079)

Sep 11

Our Stellar Partners

orange circle with with snake next to the words "The Astropy Project"

$Diffraction Limited logo of a swirled circle with text: Diffraction: Astronomy + Scientific Imaging SolutionsIm$

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Text reads "Sky & Telescope" with the ampersand in a circle.