Vibidia has a diameter of 7.6 km. There is a distinctive ray-like pattern of bright and dark material, with the bright rays extending circularly for 15 km around Vibidia, and the dark rays mostly restricted to within the crater and on the rim. The rays cut across older craters, whereas a few younger craters have formed on top of them. (wikipedia entry)
A crater is a circular depression likely created by an impact event. On Vesta they are named after names historically associated with the Roman goddess Vesta (vestal virgins, people associated with vestal virgins) and famous Roman women.
Image Source. Marker locations are approximate and may not always appear to align with image on map.