Comet Kopff or 22P/Kopff is a periodic comet in our solar system. Discovered on August 23, 1906, it was named after August Kopff who discovered the comet. The comet was missed on its November 1912 return, but was recovered on its June 1919 return. The comet has not been missed since its 1919 return and its last perihelion passage was on May 25, 2009. A close pass by Jupiter in 1939 decreased the perihelion distance and orbital period. The comet 22P/Kopff's next expected perihelion is October 25, 2015.