Perth Observatory install a 16-inch telescope at the Observatory that was built and used by the University of Western Australia staff and students, as well as Perth Observatory astronomers. Harris then moved the astrographic telescope, which had been in storage since August 1963, to the new site after arranging its refurbishment; the telescope recommenced observations on 29 March 1968, taking second epoch photographic plates for proper motion studies. In 1968, the Lowell Observatory of Flagstaff Arizona USA, located a 24-inch Boller and Chivens telescope at the Perth Observatory as part of the International Planetary Patrol Program. The program was designed to collect
Percival Lowell Planet X. Lowell started a search program in 1906 using a camera in aperture. The small field of view of the reflecting telescope rendered the instrument impractical for searching. From 1914 to 1916, a telescope on loan from Sproul Observatory was used to search for Planet X. Lowell did not discover Pluto but later Lowell Observatory (observatory code 690) would photograph Pluto in March and April 1915, without realizing at the time that it was not a star. In 1930 Clyde Tombaugh, working at the Lowell Observatory, discovered Pluto near the location expected for Planet X. Partly in recognition of