CREATE TABLE table_43785 ("Name" TEXT, "Latitude" TEXT, "Longitude" TEXT, "Diameter  ( km ) " FLOAT, "Year named" FLOAT)

How long is the diameter that has a longitude of 8.0e?
SELECT "Diameter (km)" FROM table_43785 WHERE "Longitude" = '8.0e'
SELECT "Diameter (km)" FROM "table_43785" WHERE "Longitude" = '8.0e'