asilles diameter: 11,097km
map is 6000px wide
ratio of diameter:mapwidth - 11097/6000 - 1.8495
affected zone of main impact - 1,387km diameter
would be 750px wide on map
main crater 275px/508km/316mi
esela and kulith traveled ~700km/434mi to get to the main crater

debris is from a combination of Kuraesmeris and Atis.