Born in Ireland, but his parents moved to England when he was a small child. Worked at the Royal Observatory in Greenwich. Went on several solar eclipse expeditions.
An expert on comets, in 1929 his calculation of orbits of what were then called Comet Forbes 1928 III, Comet Coggia-Winnecke 1873 VII, and Comet Pons 1818 II showed that these comets were one and the same periodic comet. The comet thus received the rather unwieldy name "Comet Pons-Coggia_Winnecke_Forbes". In 1948, he was posthumously honored when the comet was renamed after him alone (today, in modern nomenclature, it is designated 27P/Crommelin). This is similar to the case of Comet Encke, where the periodic comet is named after the person determining the orbit rather than the possibly-multiple discoverers and re-discoverers at each apparition.
Crommelin, Andrew Claude de la Cherois, “Note on the Approaching Return of Halley’s Comet”;, Monthly Notices of the Royal Astronomical Society, 67 (1906), 137-140.
Cowell, Philip Herbert and Crommelin, Andrew Claude de la Cherois, “The Perturbations of Halley’s Comet in the Past: Second Paper: The Apparition of 1222”, Monthly Notices of the Royal Astronomical Society, 68 (1908), 173-179.
Cowell, Philip Herbert and Crommelin, Andrew Claude de la Cherois, “The Perturbations of Halley’s Comet in the Past.
Albert Marth, Note on the Transit of the Earth and Moon across the SunÂ’s Disk as seen from Mars on November 12, 1879, and on some kindred Phenomena, Monthly Notices of the Royal Astronomical Society, 39 (1879), 513–514.
AndrewCrommelin, Observations of Mars, 1904–6, Monthly Notices of the Royal Astronomical Society, 64 (1904), 520–521 [1]
Jean Meeus & Edwin Goffin, Transits of Earth as Seen from Mars, Journal of the British Astronomical Association, 93 (1983), 120–123 [1]
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