British Astronomical Association
British Astronomical Association (BAA) Main organization co-ordinating the work of amateur astronomers in the UK, with a membership (2001) of around 2500. It was founded in 1890 as an egalitarian alternative to the Royal Astronomical Society. The BAA has a number of observing sections, each dedicated to a specific area of astronomy. Reports are published in a bimonthly Journal, and the annual Handbook provides ephemerides for astronomical phenomena.