He discovered or co-discovered a large number of comets, including the periodic comet 7P/Pons-Winnecke and the comet once known as "Pons-Coggia-Winnecke-Forbes" but later renamed to 27P/Crommelin after Andrew Crommelin, who computed its orbit.
Friedrich August Theodor Winnecke, nemški astronom, * 5. februar 1835, Groß-Heere pri Hannovru, Nemčija, † 3. december 1897, Bonn, Nemčija.