The comet was discovered 19 October 2008 by the American astronomer Robert S. McMillan . In December, S. Nakano link to this comet that was observed as early as in October 2000 and gave it the tag S7 2000.
Comet McMillan or 208P/McMillan is a periodic comet with orbital period of about 8.1 years. The comet belongs to the Jupiter family of comets. It will next come to perihelion on 1 July 2016.