Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_16799784_3 (diameter__km_ VARCHAR, longitude VARCHAR)
### Question:
At a longitude of 109.9e, how many features were found?
### Answer:
SELECT COUNT(diameter__km_) FROM table_16799784_3 WHERE longitude = "109.9E"