What was the year when the diameter was 729 km?
CREATE TABLE table_name_59 (year_named VARCHAR, diameter__km_ VARCHAR)
SELECT year_named FROM table_name_59 WHERE diameter__km_ = 729
### Context: CREATE TABLE table_name_59 (year_named VARCHAR, diameter__km_ VARCHAR) ### Question: What was the year when the diameter was 729 km? ### Answer: SELECT year_named FROM table_name_59 WHERE diameter__km_ = 729