Deadline Extended to Submit Talk Abstracts
The AAVSO invites would-be presenters to submit their topics by September 10.
Slider Link
https://docs.google.com/forms/d/e/1FAIpQLSem_OgxpsoUuNBwlZ5RZEZmJ4a9qmu32yY24oyhT0fEaLdj8g/viewform
We Have a New Login System
Click Here to Learn More
Slider Link
/new-login
Registration Opens for Annual Meeting
Join us at the U.S. Space & Rocket Center in Huntsville, Alabama!
Slider Link
https://www.aavso.org/113
Discover the AAVSO
An international community
Slider Link
/welcome

old logo

The mission of the AAVSO is to enable anyone, anywhere to participate in scientific discovery through variable star astronomy. 

Resources

VSX Logo
(VSX) Variable Star Index
/index.php/vsx

Pick a Star

Plot a light curve
jaavso
The Journal of the AAVSO
/index.php/apps/jaavso
Data
Submit and Access Data
/index.php/databases
Telescope
Tools and Observer Resources
/index.php/observers
Observing Sections
Observing Sections
/index.php/observing-sections
Education
Education
CHOICE Courses, Manuals, Videos
/index.php/education
AAVSO In the Press
AAVSO In the Press
/index.php/press
Membership and Support
Membership and Support
/index.php/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 4 , 4 9 4 , 3 8 7 and Counting ...

Last Observation Received:

8 min 3 sec ago by OYE - Yenal Ogmen (CY)

V1130 CYG   Sep 9.8963   12.4407V

Plot V1130 CYG light curve

Alert Notice 868: Photometry of BZ Camelopardalis in support of HST, Chandra multiwavelength observing campaign
Aug 26
Alert Notice 869: CS Ind HST schedule set for August 30
Aug 23
Stellafane: 88 Years . . . and Counting
Aug 22
New Forums, Chat, and Sign in with Google
Aug 21
Director’s Report for 2024-Q2
Aug 14
News Archives

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

Chroma Technology logo: the word chroma goes through a bright rainbow-colored hoop

Black outline of an intricately dressed being with accentuated features

Unistellar

Boyce Astro Logo

Text reads DC-3 Dreams Observatory Operating Systems

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

NSF

NASA Logo