Feralia Planitia (Vesta)

Roman All Souls’ Day (February 21) where each household made offerings at the graves of its dead.

Feralia Planitia /fəˈreɪliə pləˈnɪʃiə/ is the third-largest known impact crater on the asteroid Vesta, after Rheasilvia and Veneneia. It is one of several old, degraded impact basins that predate the Rheasilvia basin that now dominates Vesta. It is situated near the equator, and is 270 kilometres across east to west, though compressed latitudinally by the Rheasilvia impact. (wikipedia entry)

A planitia is a low plain. On Vesta they are named after places and festivals associated with vestal virgins.