Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_21077 ( "Name" text, "Latitude" text, "Longitude" text, "Diameter (km)" text, "Year named" real, "Name origin" text )

### Question ###
How many numbers are listed under diameter with a lattitude of 5.0n?

### Accurate SQL ###

SELECT COUNT("Diameter (km)") FROM table_21077 WHERE "Latitude" = '5.0N'