Skip to main content

Support the AAVSO


2020 AAVSO online CHOICE courses


AAVSO Selected to Participate in Harvard Business School Association of Boston’s Community Action Partners Program

Dennis Conti Honored

AAVSO observer Dennis Conti received the 2020 AAS Chambliss Amateur Achievement Award "for his outstanding observational, computational, and educational contributions to exoplanet studies."

From our Leadership

President's letter December, 2019

Are you an undergrad or grad student? Volunteer as an AAVSO Ambassador!

Pick a Star

Type star name then click action.
Recent Activity

Variable Star Observations in Database:

40,452,082 and Counting ...
Last Observation Received:

34 min 33 sec ago by SDN - Douglas Slauson (US)

bet Lyr   Jul 3.2882   3.4Vis.   

Plot bet Lyr light curve


We gratefully acknowledge support from the Friends of the AAVSO:


AAVSO is an equal opportunity and discrimination/harassment-free environment. Please read our policies here.

AAVSO 49 Bay State Rd. Cambridge, MA 02138 617-354-0484