Athenaeum Club Observatory [AtCO] (1858 – ), Bury St Edmunds, established by the Athenaeum Club in Bury-St.-Edmunds, Suffolk. The main telescope is a 4-inch Troughton & Simms Refractor housed inside a dome on top of the building (Mobberley & Goward 2005).
Bennett’s Observatory [BeO](1922-37), Leiston, established Arthur Frederick Bennett, the observatory was equipped with a 6-inch Cooke refractor on an equatorial mount (see Orwell Astronomy Society: History section [http://www.oasi.org.uk]; Stroobant 1931).
Boreham’s Observatory [BorO] (1850s- ), Havershill, established by William Wakling Boreham and equipped with a 6-inch refractor on a transportable equatorial mounting. After Boreham’s death the telescope was donated to Newham College, Cambridge and erected in a new observatory in the college grounds (Obit., MNRAS, 47 (4 ), 135).
Cockfield Tower Observatory [CTO] (1767-1773), St. Peter’s Church, Cockfield, established by the Revd. William Ludham where he made observations using a transit instrument – evidence of a slot in the tower wall, which has been repaired, is apparent. The instrument might be the one used at the St. Johns College Observatory, Cambridge – preserved at the Whipple Museum, Cambridge (Mobberley 2006, 123-5).
Collinson’s Observatory [CoO] (1980s-1990), Playford, established by Edward Howard Collinson and equipped with 10-inch Calver Reflector on loan from the British Astronomical Association (Obit.: JBAA, 101 (1991), 12-3; Obit., QJRAS, 32 (1991), p.207 & Orwell Astronomy Society: History section [www.oasi.org.uk]).
Ludham’s Observatory (1767-1773) see Cockfield Tower Observatory above.
May’s Observatory [MaO] (1840-1851), Bolton Lane, Ipswich, established by Charles May and equipped with a 6 1/4-inch refractor by Merz, a 20-inch [FL] transit instrument housed in a building to the ‘Bedford Plan’ and dome like that of Hartwell House – a reference to Admiral Smyth’s Bedford and Lee’s Observatories (Obit., MNRAS, 21 (1861), 101-2; Weale 1851, 71-2).
Mobberley’s Observatory [MobOC] (1980s- ), Cockfield, established by Martin Mobberley and equipped with a 14-inch SCT instrument on a Paramount mount and a 12-inch Reflector stored in ‘Dog Kennel’ shed (Moore 2002, 29-40).
Orwell Park Observatory [OPO] 1874- ), Nacton, Ipswich, established by Colonel George Tomline at his at Orwell Park. Its main telescope is a 10-inch Merz refractor on a Troughton & Simms mounting with a transit instrument housed adjacent to the main dome. It was principally used to observe comets. The former country house is now a school, and in recent times the Observatory has been superbly restored by members of Orwell Astronomical Society (Hutchins 2012 & see [see www.oasi.org.uk]).