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Discover the AAVSO

An international community

/welcome

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

/vsx

The Journal of the AAVSO

/apps/jaavso

Submit and Access Data

/databases

Tools and Observer Resources

/observers

Observing Sections

/observing-sections

Education

CHOICE Courses, Manuals, Videos

/education

AAVSO In the Press

/press

Membership and Support

/join-aavso

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 , 4 8 1 , 8 5 8 and Counting ...

Last Observation Received:

36 min 41 sec ago by HMB - Franz-Josef (Josch) Hambsch (BE)

ASASSN-24GR Dec 13.2754 14.671CV

Plot ASASSN-24GR light curve

RW Cephei, a King of Kings

Dec 11

Board Election Results

Nov 19

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

News Archives

Our Stellar Partners

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

Announcement: New Forums

Resources

Pick a Star

AAVSO at a Glance

Variable Star Observations in Database:

Last Observation Received:

Our Stellar Partners