Xappho is a COMET discovered in 1819 by the German astronomer Heinrich Wilhelm Olbers. It is a periodic COMET, meaning it orbits the Sun in a predictable pattern and returns to the inner Solar System every 5.3 years. Xappho is classified as a Jupiter-family COMET, which means its orbit is strongly influenced by the gravity of Jupiter. It is estimated to have a diameter of about 2.5 kilometers and is composed of ice, dust, and other materials.