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September 12, 1811. Next perihelion. ≈ 48th century. Physical characteristics. Dimensions. 30−40 km [3] The Great Comet of 1811, [4] formally designated C/1811 F1, is a comet that was visible to the naked eye for around 260 days, the longest recorded period of visibility until the appearance of Comet Hale–Bopp in 1997.
It is one of the brightest known periodic comets, reaching an absolute visual magnitude of about 5 in its approach to perihelion. [2] Comet Pons-Brooks was conclusively discovered at Marseilles Observatory in July 1812 by Jean-Louis Pons, and on its next appearance in 1883 by William Robert Brooks. [10]
It was visible to the naked eye for a record 18 months, due to its massive nucleus size. This is twice as long as the Great Comet of 1811, the previous record holder. Accordingly, Hale–Bopp was dubbed the great comet of 1997.
Oct 10, 2020 · Both comets were visible for a long period of time and both of them were among the brightest and most-observed comets of their respective timeframes. Although it was never formally named for him, the Great Comet of 1811 was discovered by a French astronomer, Honore Flaugergues, on the evening of March 25 of that year.
The comet was visible for the first time on the 5th September, 1811. On the 7th, at half past seven o'clock, P. M. it was observed by professor Wood, of William and Mary College, and its situation then as calculated by that gentleman is thus described: it was in the same line with the polar star, and alpha and beta or the two pointers of the ...
The Great Comet of 1811, first observed in March and easily visible in the night sky during September and October, made a dramatic backdrop for the first weeks of the trip. More information on the Great Comet of 1811 is available from astronomer Gary W. Kronk.
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