139P/Vaisala-Oterma

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Updated on December 10, 2022

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 2027 July 23 139P 2017 Dec. 10 139P 2008 Apr. 19 139P/1998 WG22 1998 Sept.28 1988 July 18 1978 May 18 1968 Oct. 22 1959 Mar. 4 1949 July 16 139P/1939 TN 1939 Dec. 30

The perihelion dates since 1939 until 1988 are calculated by Kazuo Kinoshita (http://www9.ocn.ne.jp/~comet/pcmtn/0139p.htm).