Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future
180P2023 July 12 180P2015 Dec. 12 180P/2006 U32008 May 26 180P/2001 K12000 Nov. 6 1993 Apr. 28 1985 Oct. 12 1978 Mar. 16 1970 July 10 1962 Oct. 3 180P1954 Dec. 22