Chaldean Society, Ipswich branch [1920s & 1930s] (CSI), formed in 1921 with monthly meeting held at Ipswich museum. The national group was founded in London (1916), being dedicated to observational astronomy – see IDAS.
Darsham and Surrounding Hamlets Astronomical Society (DASH), founded 2013 in to encourage astronomy, for both beginners and the more experienced. The members (25) meet at Westleton Village Hall, North Suffolk, observing from the nearby common.
Ipswich & District Astronomical Society (IDAS), founded 1948 from 25 members of the Ipswich & District Natural History Society, led by Roland Clarkson. The astronomy section later ceded formining IDAS. The Society occasionally used Orwell Park Observatory, but its main interest were lectures and telescope construction rather than observing. A lack of leadership with the departure of Clarkson the group folded by 1957.
Lowestoft & Great Yarmouth Astronomical Society (LYRA), founded 1967, originally as the Yarmouth Astronomical Society. Members (40 – 2016) meet at Parkhill Hotel, Oulton Village (NR32 5DQ). The society restored and formerly used the Observatory and 12-inch reflecting telescope in the grounds of Kirkley High School, Lowestoft (see A Brief History of LYRA by Ron Larter).
Orwell Astronomical Society (OrwAS), founded 1966-7 by school friends who approached Orwell Park School to re-instate the Orwell Park Observatory (see above). Much of the society’s activities have been involved with the restoration and maintenance of the observatory.
Stour Astronomical Society (StouAS), founded 2003 (formerly Stour Valley Astronomical Society) for amateur astronomers in the Stour Valley area. Members meet at the Memorial Hall, Cavendish (CO10 8A).
Survey of Astronomical History 