CREATE TABLE table_21076 ("Name" TEXT, "Latitude" TEXT, "Longitude" TEXT, "Diameter  ( km ) " TEXT, "Year named" FLOAT, "Name origin" TEXT)

At what latitude can you find the diameter (km) of 500.0?
SELECT "Latitude" FROM table_21076 WHERE "Diameter (km)" = '500.0'
SELECT "Latitude" FROM "table_21076" WHERE "Diameter (km)" = '500.0'