D/1766 G1 ( Helfenzrieder )

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Updated on October 31, 2021

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 2026 Mar. 16 2021 Nov. 16 2017 July 16 2013 Mar. 16 2008 Nov. 16 2004 July 17 2000 Mar. 20 1995 Dec. 10 1991 Aug. 30 1987 Mar. 2 1982 Sept.27 1978 Apr. 25 1973 Nov. 19 1969 June 11 1965 Jan. 5 1960 Aug. 7 1956 Mar. 8 1951 May 20 1946 Oct. 1 1942 Feb. 14 1937 July 1 1932 Nov. 13 1928 Mar. 13 1923 Oct. 13 1919 May 16 1914 Dec. 7 1910 June 26 1906 Jan. 15 1901 Aug. 8 1897 Feb. 26 1892 Sept.11 1888 May 26 1884 Feb. 9 1879 Oct. 3 1875 May 22 1871 Jan. 9 1866 Aug. 31 1862 Apr. 18 1857 Dec. 8 1853 Aug. 9 1849 Apr. 9 1844 Oct. 4 1840 May 21 1836 Jan. 7 1831 Aug. 20 1827 Mar. 28 1822 Nov. 6 1818 June 19 1814 Jan. 29 1809 Sept. 9 1805 June 7 1801 Mar. 5 1796 Oct. 27 1792 June 18 1788 Feb. 9 1783 Sept.30 1779 May 18 1775 Jan. 7 1770 Sept. 2 D/1766 G1 1766 Apr. 27

The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996. The perihelion dates since 1770 are calculated by Kazuo Kinoshita (http://www9.ocn.ne.jp/~comet/pcmt/h66g1.htm).