Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future
2012 Feb. 7 2006 July 7 2000 Oct. 7 1995 Jan. 19 1989 July 15 1984 Jan. 15 1978 July 25 1973 Feb. 3 1967 Aug. 16 1962 Feb. 23 1956 Aug. 30 1951 Mar. 2 1945 Aug. 19 1940 Jan. 29 1934 July 21 1928 Dec. 23 1923 June 9 1917 Sept.20 1912 Jan. 12 1906 July 17 1901 Jan. 24 1895 Aug. 10 1890 Feb. 25 1884 Sept.13 5D1879 Mar. 31 5D1873 Oct. 10 5D1868 Apr. 17 1862 Oct. 13 5D/1857 F11857 Mar. 29 1851 Sept.24 5D/1846 D21846 Feb. 25