A periodic comet discovered in 1969 October by the Ukrainian astronomers Klim Ivanovic Churyumov (1937–2016) and Svetlana Ivanovna Gerasimenko (1945– ). In 2014 it was visited by the Rosetta probe, which found its nucleus to be double-lobed, with dimensions 4.1 km × 2.6 km, density 0.53, and rotation period 12.4 hours. The comet orbits the Sun every 6.44 years at an average distance of 3.46 au, perihelion 1.24 au, aphelion 5.68 au, eccentricity 0.64, and inclination 7°.04. It is a Jupiter-family comet.

http://sci.esa.int/rosetta/54472-comet-67p-on-3-august-2014/ The nucleus of Comet 67P/Churyumov–Gerasimenko, seen in 2014 by the European Space Agency’s probe Rosetta.