31P/Schwassmann-Wachmann 2

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Updated on October 26, 2008

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 31P 2010 Sept.29 31P 2002 Jan. 18 31P 1994 Jan. 23 31P 1987 Aug. 30 31P 1981 Mar. 17 31P 1974 Sept.12 31P 1968 Mar. 14 31P 1961 Sept. 5 31P 1955 Feb. 27 31P 1948 Aug. 23 31P 1942 Feb. 13 31P/1934 X1 1935 Aug. 28 31P/1929 B1 1929 Mar. 23

The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996.