CREATE TABLE table_72810 ("Name" TEXT, "Latitude" TEXT, "Longitude" TEXT, "Diameter  ( km ) " TEXT, "Year named" FLOAT, "Name origin" TEXT)

At a longitude of 109.9e, how many features were found?
SELECT COUNT("Diameter (km)") FROM table_72810 WHERE "Longitude" = '109.9E'
SELECT COUNT("Diameter (km)") FROM "table_72810" WHERE "Longitude" = '109.9E'