31P/Schwassmann-Wachmann 2

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Updated on September 12, 2017

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 31P 2019 July 6 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.