Saturnalia Fossa

Saturnalia Fossa /sætərˈneɪliə ˈfɒsə/ is the largest of the series of parallel Veneneian troughs in the northern hemisphere of the giant asteroid 4 Vesta. It is estimated to be approx. 39 km wide and is at least 365 km long; as of early 2012, one end disappeared in shadow and its total length was thus unknown. It is thought to be a shock fractures resulting from the impact that created Veneneia crater, which it is concentric with. It is one of the longer chasms in the Solar System, and is named after the Roman festival of Saturnalia.