BornRoubaix, Belgium, 25 July 1888
Diedprobably Marseilles, France, 27 June 1974
Robert Jonckheere was one of the leading double star discoverers of the twentieth century. As the son of a Belgian industrialist, Jonckheere developed an early passion for astronomy and exhibited talent in this area because of his acute vision. His father provided an observatory equipped with an 8.7-in. refractor at their home in Roubaix in 1905. Young Jonckheere joined the Société Astronomique de France [SAF] in that same year and published his early results in the Comptes rendus de l'Academie des sciences, The Observatory, and the Monthly Notices of the Royal Astronomical Society. By 1908, it was clear that a larger telescope in a darker area would benefit Jonckheere’s observation program, so he constructed a new observatory at Hem, near Lille, in 1908 and commenced a program of observation and discovery of double stars. From 1908 to 1914, Jonckheere discovered 1,067 new faint (between 9th and 15th...