67P/Churyumov-Gerasimenko is a Jupiter family comet, originally from the Kuiper Belt. 67P is approximately 4.3 x 4.1 km (2.7 x 2.5 miles) at its longest and widest points. 67P has an orbital period of 6.45 years and a rotation period of about 12.4 hours. It was first observed on photographic plates in 1969 by Soviet Astronomers for whom it is named after.
It is possible to see 67P on SOS Explorer thanks to the success of the European Space Agency's Rosetta mission, which was launched on March 2, 2014. Rosetta's lander, Philae, landed on the comet's surface on November 12, 2014, becoming the first spacecraft to land on a comet.