19P/Borrelly

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Updated on December 11, 2022

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 2028 Dec. 12 19P 2022 Feb. 1 19P 2015 May 28 19P 2008 July 22 19P 2001 Sept.14 19P 1994 Nov. 1 19P 1987 Dec. 18 19P 1981 Feb. 20 19P 1974 May 12 19P 1967 June 17 19P 1960 June 13 19P 1953 June 9 1946 June 9 1939 June 8 19P 1932 Aug. 27 19P 1925 Oct. 7 19P 1918 Nov. 17 19P/1911 S1 1911 Dec. 18 19P/1904 Y2 1905 Jan. 17

The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996. The perihelion dates of non-observed returns from 1939 to 1946 are calculated using the Minor Planet & Comet Ephemeris Service.