Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future
29P2019 Mar. 7 29P2004 July 10 29P1989 Oct. 26 29P1974 Feb. 15 29P1957 May 12 29P1941 Apr. 21 29P/1927 V11925 May 7 29P/1902 E11908 Oct. 18