27P/Crommelin is a periodic comet that was first noticed by the French astronomer Jean-Louis Pons, a prolific discoverer of comets, in 1818. It was lost after several appearances and recognised again in 1928 by the British astronomer Andrew Crommelin, who calculated that the comet seen in 1873 and the one in 1928 were the same object as Pons's comet, with a period of about twenty-seven years. The comet is now named after him. It is a Halley-type comet whose returns are well observed, and it is often cited as an example of how the careful computation of orbits can link observations separated by many decades.
Before and after
- 30 November 1817Birth of Theodor Mommsen
- 1 January 1818Publication of Frankenstein; or, The Modern Prometheus
- 1818Rise of House of Bernadotte
- 1 January 1818Battle of Koregaon
- 23 February 1818Discovery of 27P/Crommelin
- 5 April 1818Battle of Maipú
- 17 April 1818Birth of Alexander II of Russia
- 5 May 1818Birth of Karl Marx
- 30 July 1818Birth of Emily Brontë
More in Universe & space
- 1774Founding of Heidelberg-Königstuhl State Observatory
- 13 March 1781Discovery of Uranus
- 23 November 1843Discovery of 4P/Faye
- 23 September 1846Discovery of Neptune
- 28 June 1851Discovery of 6P/d'Arrest
- 28 December 1904Discovery of 19P/Borrelly
The era
This moment belongs to the Industrial era (1760 CE to 1914 CE), steam, factories and revolutions. You can also browse everything in the 19th century.