He was also one of several co-discoverers of "Comet Pons-Coggia-Winnecke-Forbes", which is today known as 27P/Crommelin in honor of the astronomer who computed its orbit.
Jedanje od nekoliko suotkrivatelja kometa Pons-Coggia-Winnecke-Forbes, danas znan kao 27P/Crommelin, u čast astronoma koji je izračunao njegovu orbitu.