Table 3: Orbital elements of the C2 double weighted link (see text) for the 2003 apparition, as well as a prediction for the next perihelion passage in 2007.

	C/1999 R1 = C/2003 R5 (SOHO)
Epoch	2003 Sep. 9.0		2007 Sep. 11.0
T	2003 Sep. 8.819		2007 Sep. 11.263
q [AU]	0.0570		0.0538
e	0.97741		0.97860
[deg]	43.713		48.612
[deg]	5.022		0.019
i [deg]	13.687		12.727
P [yr]	4.01		3.99
rms [ ]	28.213