18D/Perrine-Mrkos

Returns and Appearances

Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future

		2025 Jan. 1
		2017 Feb. 26
		2009 Apr. 17
		2002 Sept.10
		1995 Dec. 6
		1989 Feb. 28
		1982 May 16
		1975 Aug. 2
	18D	1968 Nov. 1
	18D	1962 Feb. 12
	18D/1955 U1	1955 Sept.27
		1949 Apr. 5
		1942 Sept.22
		1936 Feb. 24
		1929 July 26
		1922 Dec. 23
		1916 May 22
	18D/1909 P1	1909 Nov. 1
		1903 Apr. 22
	18D/1896 X1	1896 Nov. 25

The perihelion dates in the past appearances are printed on Catalog of Cometary Orbits 1996.
The perihelion dates of non-observed returns from 1903 to 1989 are calculated using the Minor Planet & Comet Ephemeris Service.