Comet ISON, C/2012 S1 (ISON) & Encke Not The Only Comets That Will Round The Sun (i.e., perihelion) In November 2013.
. by Anura Guruge
aerith.net, by Japanese Seiichi Yoshida is an amazing resource for cometary data. His work is so appreciated that he even had Minor Planet, (32200) 2000 OT2, named after him in 2000.
He lists 84 comets that will perihelion in 2013.
That is, however, the known, discovered comets. Most likely there will be another 50 or so undiscovered comets that will also perihelion given that the SOHO Solar observatory spots, on average, 130 comets per year rounding the Sun.
So there is a veritable traffic jam around the Sun in late November, 3 well known comers perihelioing within a week: Encke, P/2005 L1 (McNaught) and, of course, Comet ISON, C/2012 S1.