9P/Tempel 1

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Updated on September 29, 2025

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 9P 2028 Feb. 12 9P 2022 Mar. 4 9P 2016 Aug. 2 9P 2011 Jan. 12 9P 2005 July 5 9P 2000 Jan. 2 9P 1994 July 3 9P 1989 Jan. 4 9P 1983 July 9 9P 1978 Jan. 11 9P/1972 A1 1972 July 15 9P/1967 L1 1967 Jan. 12 1961 July 4 1955 Dec. 13 1950 Mar. 9 1944 May 5 1937 Dec. 22 1931 June 17 1924 Dec. 9 1918 May 21 1911 Nov. 4 1905 Apr. 21 1898 Oct. 3 1892 Mar. 29 1885 Sept.24 9P 1879 May 7 9P/1873 G1 1873 May 10 9P/1867 G1 1867 May 24

The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996. The perihelion dates of non-observed returns from 1905 to 1961 are calculated using the Minor Planet & Comet Ephemeris Service. The perihelion dates of non-observed returns from 1885 to 1898 are calculated by Kazuo Kinoshita (http://www9.ocn.ne.jp/~comet/pcmtn/0009p.htm).