CREATE TABLE table_72816 ("Name" TEXT, "Latitude" TEXT, "Longitude" TEXT, "Diameter  ( km ) " TEXT, "Year named" FLOAT, "Name origin" TEXT)

What is the diameter in km of the feature with a longitude of 40.2E?
SELECT "Diameter (km)" FROM table_72816 WHERE "Longitude" = '40.2E'
SELECT "Diameter (km)" FROM "table_72816" WHERE "Longitude" = '40.2E'