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Great Comet of 1811
The Great Comet of 1811,〔Friedrich Wilhelm Argelander, ''Ueber die Bahn des grossen cometen von 1811'', (Tr. Table of the path of the great comet of 1811) 4, Konigsberg, 1822.〕 formally designated C/1811 F1, is a comet that was visible to the naked eye for around 260 days, a record it held until the appearance of Comet Hale–Bopp in 1997. In October 1811, at its brightest, it displayed an apparent magnitude of 0, with an easily visible coma.
== Discovery ==
The comet was discovered March 25, 1811 by Honoré Flaugergues at 2.7 AU from the Sun in the now-defunct constellation of Argo Navis. After being obscured for several days by moonlight, it was also found by Jean-Louis Pons on April 11, while Franz Xaver, Baron Von Zach was able to confirm Flaugergues' discovery the same night.〔.〕
The first provisional orbit was computed in June by Johann Karl Burckhardt. Based on these calculations, Heinrich Wilhelm Matthäus Olbers made a prediction that the comet would go on to become extremely bright later that year.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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