Skip to main content

Support the AAVSO



AAVSO: Optimum Science from Connecting Professionals with Citizen Volunteers

Increase Astronomical Discoveries by Storing Your Spectroscopic Observations with AVSpec

A new database created by AAVSO enables amateur to experienced observers to record data from any variable object in the sky


AAVSO Contributors Honored

AAVSO presented awards to their recipients at the 108th Annual Meeting

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

Pick a Star

Type star name then click action.
Recent Activity

Variable Star Observations in Database:

39,908,682 and Counting ...
Last Observation Received:

9 min 7 sec ago by MJHA - John McCammon (US)

OMI CET   Dec 7.0658   4.2Vis.   

Plot OMI CET 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