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_46408 ( "Name" text, "Latitude" text, "Longitude" text, "Diameter (km)" real, "Year named" real )

### Question ###
What's the average year for the name aida-wedo dorsa with a diameter less than 450?

### Accurate SQL ###

SELECT AVG("Year named") FROM table_46408 WHERE "Name" = 'aida-wedo dorsa' AND "Diameter (km)" < '450'