489P/Denning

Japanese version Home page

Updated on August 8, 2025

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 2025 Dec. 4 2016 Sept. 2 489P/2007 HE4 2007 Apr. 22 1997 Dec. 5 1988 July 26 1980 June 20 1972 Apr. 23 1964 Feb. 26 1955 Dec. 8 1947 Sept. 21 1939 Sept. 15 1931 Sept. 13 1923 Sept. 30 1916 May 29 1908 Dec. 30 1901 July 21 489P/1894 F1 1894 Feb. 9

The perihelion dates from 1894 to 1997 are printed on CBET 5425.