51P/Harrington

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Total 6,336 html files since Dec. 4, 1995 Updated on July 31, 2008

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 51P 2008 June 18 51P 2001 June 5 51P 1994 Aug. 23 51P 1987 Oct. 31 51P 1980 Dec. 24 1974 Feb. 17 1967 Apr. 23 51P/1960 P1 1960 June 28 51P/1953 P1 1953 Sept.22

The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996. The perihelion dates of non-observed returns from 1967 to 1974 are calculated using the Minor Planet & Comet Ephemeris Service.