The following SOHO comets are related and be part of own groups, first proposed by Rainer Kracht. Sebastian F. Hönig was the first to successfully link P/1999 R1 and P/2003 R5 and predict the return in 2007. If the second link is correct, then the group has three members.
Name T q (AU) e w node i Reference Linked orbits P/1999 R1 (SOHO) 1999 Sep 05.5191 0.056379 0.977645 43.3432 5.3859 13.6785 CCO 2008 P/2003 R5 (SOHO) 2003 Sep 08.8165 0.056890 0.977459 43.6242 5.0936 13.6042 CCO 2008 P/2007 R5 (SOHO) 2007 Sep 11.3197 0.053720 0.978649 48.5655 0.0489 12.6400 MPC 60664 Linked orbits: C/2002 R5 (SOHO) 2002 Sep 05.79262 0.0471997 0.9853312 45.76339 13.34199 14.17434 MPEC 2008-O23 C/2008 L6 (SOHO) 2008 Jun 10.18275 0.0459562 0.9857043 58.89903 359.83361 12.15136 MPEC 2008-O23 Single object: C/2008 L7 (SOHO) 2008 Jun 10.15 0.0455 1.0 57.99 358.06 12.14 MPEC 2008-O23 (w, node, i, in degrees)