... Observatories 2 . ... The main observing site, however, is at Sutherland, some 200 miles North of Cape Town, where the observatory maintains a suite of telescopes, including 74-inch, 40-inch, 30-inch and 20-inch reflectors. ... MSO formally became part of ANU in 1957, and added "SSO" (Siding Spring Observatory) to the title in the 1970s. As with the Cape observatory, the largest telescope is a 74-inch reflector. see this link for more historical details, and this link for details on current research...