Janet A. Mattei* AAVSO, 25 Birch Street, Cambridge, MA 02138
The American Association of Variable Star Observers (AAVSO) collects,
processes, evaluates, and makes available to researchers and educators visual,
photoelectric, and CCD observations of variable stars from observers worldwide.
The AAVSO International Database contains over 8.5 million observations. The
AAVSO recently completed the digitizing and processing of observations going
back to the founding in 1911, thus creating the world’s largest and longest (in
time) database of variable star observations. The AAVSO’s history, observing
programs, committees, and services to researchers and educators will be described
Addendum, 2007: As of October 1, 2007, the AAVSO International Database
contains over 15 million observations.