What is  the diameter in km of the feature with a longitude of 40.2E? 
CREATE TABLE table_16799784_8 (diameter__km_ VARCHAR, longitude VARCHAR)
SELECT diameter__km_ FROM table_16799784_8 WHERE longitude = "40.2E"
<s>[INST] Write mssql query to answer the following question given the database schema. Schema: CREATE TABLE table_16799784_8 (diameter__km_ VARCHAR, longitude VARCHAR) Question: What is  the diameter in km of the feature with a longitude of 40.2E?  [/INST] SELECT diameter__km_ FROM table_16799784_8 WHERE longitude = "40.2E" </s>