Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future
2015 Aug. 13 67P2009 Feb. 28 67P2002 Aug. 18 67P1996 Jan. 17 67P1989 June 18 67P1982 Nov. 12 67P/1975 P11976 Apr. 7 67P/1969 R11969 Sept.11