C/1997 J6 = C/2001 D1 = C/2004 X7 = C/2008 S2 ( SOHO )

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Updated on April 30, 2009

Returns and Appearances Discovered Appeared Not observed Appeared before discovery Not observed before discovery Returns in the future 2012 June 30 C/2008 S2 2008 Sept. 17 C/2004 X7 2004 Dec. 7 C/2001 D1 2001 Feb. 18 C/1997 J6 1997 May 1

The identification between C/2001 D1 and C/2004 X7 and C/2008 S2 is printed on M.P.E.C. 2008-S82. The identification between C/1997 J6 and C/2001 D1, C/2004 X7, C/2008 S2 is printed on M.P.E.C. 2009-H56.