19P/Borrelly

Japanese version Home page

Updated on August 1, 2023

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.